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Researchers identify a key weapon of Zika virus

Scientists at the University of Southern California discovered a key weapon used by the Zika virus to ravage the brains of infected fetuses: proteins.

In an article published in the journal Cell Stem Cell, researchers identified two proteins in Zika potentially responsible for causing microcephaly.

Microcephaly is a birth defect in which a child’s head is smaller than the average size. A variety of factors can trigger the condition, according to the U.S. Centers for Disease Control and Prevention, including malnutrition, environmental agents and other viruses. Although it is associated with brain damage, some children born with the disease never develop cognitive issues.

The proteins — called NS4A and NS4B — affect the brain by targeting a critical signaling pathway that controls cell growth and breaks down damaged cells and their elements. Initially, Zika slows cell development and reduces the variety of cells in the brain. Over time, this “rigged” system enables the virus to thrive and spread while healthy cells die.

The finding is the first step toward developing future drugs that could prevent Zika’s damaging effects, said Jae Jung, the study’s co-author and director of the USC Institute of Emerging Pathogens and Immune Diseases. ”Those two viral proteins are ultimately the target for therapy development,” he said.

Working with discarded tissue, the researchers infected fetal neural stem cells — a building block of the nervous system — with three different strains of the Zika virus. Stem cells infected with the ZIKV strain, which is responsible for causing the current outbreak, died at rates more than four times higher than an uninfected brain.

The specific proteins in question kill neural cells by hijacking a signaling mechanism called AKT-Mtor pathway. The pathway handles the process of breaking down damaged cells, also known as autophagy. As Zika spreads in the developing fetus, the virus actually uses the disposal process to continue proliferating. Cells began dying as early as two weeks after infection occurred.

The Zika virus rose to prominence in 2015 after cases of an unknown disease were reported in Brazil. Since then, the outbreak has affected more than 40 countries, including the United States.

The virus is spread by certain mosquitoes and can cause flu-like symptoms such as fever, muscle aches and joint pain in adults. Pregnant women are considered especially vulnerable because of the risk of microcephaly.

Dr. Kjersti Aagaard, a maternal-fetal medicine specialist at Texas Children’s Hospital Pavilion for Women and the Baylor College of Medicine, said microcephaly triggered by Zika is an urgent concern because of its association with brain malformation. With the virus, Aagaard said, a smaller head likely encases a smaller brain ravaged by disease.

“Microcephaly is the endpoint of the damage,” she said.

Aagaard also noted that the virus can affect pregnant women in other serious ways, too. The illness can lead to miscarriage, stillbirths and low amniotic fluid. In some cases, the illness causes both mother and child to develop ulcers in the eye.

But, some pregnant women who become infected never pass the virus to the fetus at all, Aagaard stressed. Early screening is key in identifying if and when a fetus is affected by the infected mother.

“An infected mom does not equal an infected fetus,” she said. “And an infected fetus does not equal an affected fetus.”

Findings from the latest study have already prompted further research to develop various Zika drugs and vaccines. Scientists are already working on a live, attenuated vaccine that will use a strain of the virus without the microcephaly-causing proteins, Jung said.

But questions remain, such as how these proteins interrupt the cell’s ability to regulate brain development. And while the scientists made this discovery in six months, Jung anticipates the next phase may take several years.

“We know where we are going but we need to find the detailed map,” he said.

Funding is also an issue. Congress left for recess in July without allocating monies for the Zika effort, which means labs that depend on government grants will be strapped for cash in the coming months.

But Dr. Gary Clark, chief of pediatric neurology and developmental neuroscience at Texas Children’s Hospital, said research should not be the medical community’s main priority. Instead, authorities should refocus on educating pregnant women and travelers entering the country from affected areas to prevent the virus’ spread and protect future children from a lifetime of disability.

“I think that bottom line is that this virus causes brain damage,” he said.  “And this is permanent.”

Published by agreement with Kaiser Health News, a national health policy news service that is part of the nonpartisan Henry J. Kaiser Family Foundation.

Republicans hold Zika funding hostage in Planned Parenthood fight

As the Zika virus escalates into a public health crisis, members of Congress remain entrenched politically, with Republicans and Democrats pointing fingers over the failure to act as the number of mosquito-transmitted cases in the U.S. grows.

Health and Human Services Secretary Sylvia Burwell warned lawmakers this week that her budget for fighting Zika is running out quickly.

Without more money fast, she said, the “nation’s ability to effectively respond to Zika will be impaired.”

Yet lawmakers left Washington in mid-July for a seven-week recess without approving any of the $1.9 billion President Barack Obama requested in February to develop a vaccine and control the mosquitoes that carry the virus.

Abortion politics played a key role in the gridlock over the anti-Zika bill.

Republicans angered Democrats by adding a provision to a $1.1 billion take-it-or-leave-it measure that would have blocked Planned Parenthood clinics in Puerto Rico from receiving money.

U.S. Sen. Tim Kaine of Virginia, the Democratic candidate for vice president, has called for Congress to reconvene to immediately address the threat posed by Zika.

But Senate Majority Leader Mitch McConnell has signaled he is in no rush to return.

In an op-ed published recently in the Lexington Herald-Leader, the Kentucky Republican criticized Democrats for balking at passing the bill.

He said they’ll get another chance after Labor Day when Congress is back in session.

Here are key points to know about the anti-Zika legislation.

 

ZIKA MONEY BEING SPENT ‘AGGRESSIVELY, PRUDENTLY’

Burwell’s Aug. 3 letter seeks to counter Republicans who’ve criticized the Obama administration for not using several hundred million dollars already in the federal budget for Zika prevention.

The money was initially allotted for fighting Ebola but was redirected to address Zika.

U.S. Sen. Marco Rubio, R-Fla., said there’s no excuse for not spending money that Congress already has provided.

“Why are they holding that money back?” he asked.

Burwell said her agency is committed to using “scarce federal dollars aggressively and prudently.”

The U.S. Centers for Disease Control received the bulk of the $374 million “repurposed” for Zika domestic response efforts, she said, and it will exhaust the remainder of the money by Sept. 30.

Money for vaccine development will run out even sooner, she said.

The second phase of clinical trials would be delayed as a result, and Americans would have to wait longer for a vaccine, according to Burwell.

“Now that the United States is in the height of mosquito season and with the progress in developing a Zika vaccine, the need for additional resources is critical,” Burwell wrote.

 

DON’T EXPECT CONGRESS TO INTERUPT ITS RECESS

U.S. Sen. Bill Nelson, a Florida Democrat, said Congress doesn’t have to interrupt its lengthy summer break to pass the bill.

But Republicans immediately dismissed his proposal.

Nelson’s state has become the epicenter for Zika in the U.S. Fifteen people are reported to be infected with the virus in Miami’s Wynwood arts district.

These are believed to be the first mosquito-transmitted cases in the mainland United States, a situation that Nelson said heightens the urgency to respond.

In an Aug. 2 letter to McConnell, Nelson said an anti-Zika bill could be passed in the Senate through a parliamentary procedure known as a pro forma session that requires the presence of only a few senators.

But even Nelson isn’t optimistic that will happen. And he took a jab at McConnell, predicting the Senate would move hurriedly if a transmitted Zika case is reported in Kentucky, McConnell’s home state.

Don Stewart, McConnell’s spokesman, said Nelson’s proposal isn’t at all plausible unless Democrats are willing to end their filibuster of the anti-Zika bill that the House already has passed.

Otherwise, the Senate would be only approving an earlier version of the legislation that Obama could not sign into law, Stewart said.

 

ZIKA IS RISKY FOR BUSINESS TOO

Zika is a looming economic development problem too, according to Rubio.

Many Florida businesses depend heavily on tourism and the state’s economy could be hurt if potential visitors decide to stay away, he said.

“I can foresee now when people that are planning to come to Florida, to go fishing perhaps, will decide to cancel their trip because they’re worried about mosquitoes and they’re worried about Zika,” Rubio said.

White House spokesman Josh Earnest said that it’s up to Congress to pass the legislation so that more can be done.

“They left on a seven-week recess a day early, at the height of mosquito season and basically told the American people, ‘good luck,”” Earnest said.

Wisconsin health officials report 1st confirmed Zika infection

Wisconsin Department of Health Services officials announced a resident has a confirmed case of Zika virus infection.

The individual who tested positive is a woman who recently traveled to Honduras, where Zika-infected mosquitoes are present.

There have been no locally-acquired cases of Zika virus infection in Wisconsin or in the continental United States, according to the DHS.

“Wisconsin is one of the last states to have a confirmed case of Zika virus infection detected in a resident, but we have been actively preparing for the likelihood that this day would come,” State Health Officer Karen McKeown said in a news release. “Together with partners we have been working to prepare our Zika virus response plans. This includes testing more than 300 people who have traveled to countries with known Zika virus transmission, and monitoring for the presence of mosquitoes that may carry Zika virus. We will remain vigilant in our response to ensure the safety and health of all Wisconsinites, particularly pregnant women and unborn babies, who are most at risk.”

DHS, according to the news release, has been working on this issue with the U.S. Centers for Disease Control and Prevention, local health departments, health care professionals, the Wisconsin State Lab of Hygiene and the University of Wisconsin-Madison Entomology Department.

Because Zika virus poses the greatest risk to pregnant women and their unborn babies, DHS has targeted outreach to health care providers caring for pregnant women, because an infected mother may pass the Zika virus to a baby during pregnancy.

Zika virus may cause microcephaly in the infant, which is a medical condition in which the size of the head is smaller than normal because the brain has not developed properly.

About 80 percent of people who are infected with Zika virus do not have any symptoms.

Illness may develop in 20 percent of infected people within 3 to 7 days after a bite from an infected mosquito.

Symptoms are generally mild and can last for several days to a week. Common symptoms of Zika virus infection include fever, rash, joint pain, conjunctivitis (red eyes), muscle pain or headache.

There is no medication to treat Zika virus disease and no vaccine is currently available.

Zika is typically transmitted to people by a bite from an infected mosquito, however, it can also be spread from mother to unborn child, through sexual contact and through blood transfusions.

According to DHS, surveillance has not identified mosquitoes that carry the Zika virus in Wisconsin.

The best way to prevent Zika virus infection is to avoid travel to areas where active transmission is present. Zika is only one of several diseases that can be spread by mosquitoes. To protect yourself from mosquito bites, consider the following:

  • Wear long-sleeved shirts, long pants, socks, and shoes.
  • Use EPA-registered insect repellants and apply according to the label instructions.
  • Stay and sleep in places with air conditioning and screened-in windows.
  • Avoid being outside during times of high mosquito activity, specifically around dawn and dusk.
  • Prevent standing water in your yard by disposing discarded tires, cans, plastic containers; draining standing water from pool or hot tub covers; turning over plastic wading pools and wheel barrows when not in use; keeping drains, ditches and culverts clean of trash and weeds so water will drain properly; and cleaning gutters to ensure they drain properly.

On the Web

For more information, go to the DHS Zika virus webpage.

Tests show baby born with HIV is in remission

Doctors now have convincing evidence that they put HIV into remission, hopefully for good, in a Mississippi baby born with the AIDS virus – a medical first that is prompting a new look at how hard and fast such cases should be treated.

The case was reported earlier this year but some doctors were skeptical that the baby was really infected rather than testing positive because of exposure to virus in the mom’s blood.

The new report, published online on Oct. 23 by the New England Journal of Medicine, makes clear that the girl, now 3, was infected in the womb. She was treated unusually aggressively and shows no active infection despite stopping AIDS medicines 18 months ago.

Doctors won’t call it a cure because they don’t know what proof or how much time is needed to declare someone free of HIV infection, long feared to be permanent.

“We want to be very cautious here. We’re calling it remission because we’d like to observe the child for a longer time and be absolutely sure there’s no rebound,” said Dr. Katherine Luzuriaga, a University of Massachusetts AIDS expert involved in the baby’s care.

The government’s top AIDS scientist, Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, agreed.

“At minimum, the baby is in a clear remission. It is possible that the baby has actually been cured. We don’t have a definition for cure as we do for certain cancers, where after five years or so you can be relatively certain the person is not going to go and relapse,” he said. A scientist at his institute did sophisticated tests that showed no active virus in the child.

A government-sponsored international study starting in January aims to test early treatment in babies born with HIV to see if the results in this case can be reproduced.

Most HIV-infected moms in the U.S. get AIDS medicines during pregnancy, which greatly cuts the chances they will pass the virus to their babies. But the Mississippi mom got no prenatal care and her HIV was discovered during labor. Doctors considered the baby to be at such high risk that they started the child on three powerful medicines 30 hours after birth, rather than waiting for a test to confirm infection as is usually done.

Within a month, the baby’s virus fell to undetectable levels. She remained on treatment until she was 18 months old when doctors lost contact with her. Ten months later when she returned, they could find no sign of infection even though the mom had stopped giving the child AIDS medicines.

Only one other person is thought to have been cured of HIV infection – a San Francisco man who had a bone marrow transplant in 2007 from a donor with natural resistance to HIV, and showed no sign of infection five years later.

In the Mississippi baby, “there’s no immune mechanism we can identify that would keep the virus in check” like that bone marrow donor, said another study author, Dr. Deborah Persaud of the Johns Hopkins Children’s Center, who helped investigate the case because she has researched treatment in children.

Dr. Peter Havens, pediatric HIV chief at Children’s Hospital of Wisconsin and a government adviser on HIV treatment guidelines, said the child may have an undiscovered genetic trait that helped her manage the virus.

“I’m just not convinced that her dramatic response would be replicable in a large population,” he said. It’s too soon to recommend treating other high-risk babies so aggressively without more study, he said.

In the upcoming study, doctors plan to give AIDS medicines for at least two years and watch for signs of remission before suspending treatment and seeing whether a remission results.

The Mississippi case “did open people’s eyes further” about a possible cure, Luzuriaga said. “We might be able to intervene early and spare children a lifetime of therapy. That is the potential impact of this case.”

On the Web…

AIDS information: HTTP://WWW.AIDSINFO.NIH.GOV

and HTTP://WWW3.NIAID.NIH.GOV/TOPICS/HIVAIDS/

Iowa man who didn’t tell his sex partner he had HIV wants conviction overturned

A Plainfield, Iowa man sentenced to 25 years in prison for failure to notify his sex partner he carried HIV went before the Iowa Court of Appeals this week.

Nick Rhoades had pleaded guilty to failing to disclose his HIV status before having sex with a Cedar Falls man in June 2008.

His attorneys say the contact was consensual, Rhoades used a condom and HIV was not transmitted.

Rhoades, whose sentence was reduced and who has been on probation, claims he should not have been advised to plead guilty because he lacked the intent to spread HIV required to be proven by state law.

Rhoades, who had to register as a sex offender for life, wants his conviction overturned.

2 stem cell patients stop HIV drugs, no virus found

Two HIV-positive patients in the United States who underwent bone marrow transplants for cancer have stopped anti-retroviral therapy and still show no detectable sign of the HIV virus, researchers said this week.

The Harvard University researchers stressed it was too early to say the men have been cured, but said it was an encouraging sign that the virus hasn’t rebounded in their blood months after drug treatment ended.

The first person reported to be cured of HIV, American Timothy Ray Brown, underwent a stem cell transplant in 2007 to treat his leukemia. He was reported by his German doctors to have been cured of HIV two years later.

Brown’s doctors used a donor who had a rare genetic mutation that provides resistance against HIV. So far, no one has observed similar results using ordinary donor cells such as those given to the two patients by the Harvard University researchers.

The researchers, Timothy Henrich and Daniel Kuritzkes of the Harvard-affiliated Brigham and Women’s Hospital in Boston, announced last year that blood samples taken from the men – who both had blood cancers – showed no traces of the HIV virus eight months after they received bone marrow transplants to replace cancerous blood cells with healthy donor cells. The men were still on anti-HIV drugs at the time.

The men have both since stopped anti-retroviral therapy – one 15 weeks ago and the other seven weeks ago – and show no signs of the virus, Henrich told an international AIDS conference in Malaysia.

“They are doing very well,” Henrich said. “While these results are exciting, they do not yet indicate that the men have been cured. Only time will tell.”

The HIV virus may be hiding in other organs such as the liver, spleen or brain and could return months later, he warned.

Further testing of the men’s cells, plasma and tissue for at least a year will help give a clearer picture on the full impact of the transplant on HIV persistence, he said.

Kuritzkes said the patients will be put back on the drugs if there is a viral rebound.

A rebound will show that other sites are important reservoirs of infectious virus and new approaches to measuring these reservoirs will be needed in developing a cure, Henrich said.

“These findings clearly provide important new information that might well alter the current thinking about HIV and gene therapy,” Kevin Robert Frost, chief executive of The Foundation of AIDS Research, said in a statement. “While stem cell transplantation is not a viable option for people with HIV on a broad scale because of its costs and complexity, these new cases could lead us to new approaches to treating, and ultimately even eradicating, HIV.”

LGBT, AIDS groups vow to ‘re-engage’ community in HIV fight

The executive directors from 35 LGBT and HIV/AIDS organizations on June 3 released a joint letter committing themselves and their organizations to re-engaging the LGBT community in the fight against HIV.

Despite making up an estimated 2 percent of the population, gay and bisexual men accounted for more than 63 percent of new HIV infections in 2010, and gay men are the only group in which HIV infections are increasing.

“We are at an important crossroads in our fight against HIV,” stated National Minority AIDS Council executive director Paul Kawata.  “The evidence behind treatment as prevention, and expansions in health care coverage that will accompany implementation of the Affordable Care Act, have provided a unique opportunity to end this epidemic, which has ravaged our community for more than three decades. But this will not happen without the full engagement of those most impacted by the disease, and no community has been more heavily affected than the LGBT community.  I am thrilled to be a part of this campaign to re-energize the LGBT response and work together to realize the vision of an AIDS-free generation.”

Kevin Cathcart, the executive director of Lambda Legal, said, “As an organization that has been working to combat HIV discrimination since the beginning of the epidemic we are excited to see the LGBT movement re-commit to this work. Because gay and bisexual men and transgender people are disproportionately affected by the epidemic and because we see the effects of discrimination and laws targeting people with HIV for criminalization it is incredibly important for the LGBT community to step up.”

The joint letter said, in part, “Over the last 30 years, the (LGBT) community has seen great strides in the movement for full equality. Much of this success is the result of a concerted movement, which was galvanized in response to the AIDS epidemic in the 1980s…In the decades since our movement has seen incredible victories… Unfortunately, our community hasn’t maintained the same momentum in our fight against HIV…Each day, more than 80 gay and bisexual men become infected with HIV in the United States…Despite these alarming statistics, which have galvanized our community in the past, the HIV epidemic has seemed to fall by the way side.  Many in our community have simply stopped talking about the issue.  This must change.”

To read the letter and see a video go on to www.wethelgbt.org.

President issues World AIDS Day statement

President Barack Obama has issued a statement in observance of World AIDS Day, which takes place annually on Dec. 1.

The president said:

“This Saturday, Dec. 1, on World AIDS Day, we will come together as a global community to stand with people affected by HIV/AIDS, to remember those we have lost, and to renew our commitment to ending the pandemic once and for all. We have made great strides in combating this disease, and an AIDS-free generation is within sight.  Here in the United States we are implementing a National HIV/AIDS Strategy and concentrating our efforts in communities where HIV rates are highest, including among gay men, Latinos, and African Americans. We are investing in comprehensive HIV prevention and care, including through the Affordable Care Act, to prevent infection and ensure that all people living with HIV have access to life-extending treatment. Testing for HIV remains a top priority, and thanks to ongoing scientific advancements, finding out your HIV status has never been easier and treatment is more effective than ever. 

“Today, I am pleased my Administration will make public new data that demonstrates we are on track to meet the ambitious treatment and prevention targets I announced on World AIDS Day a year ago.  As of today, we are treating over 5 million people with lifesaving medicines for AIDS, up from 1.7 million in 2008, and, as I pledged last year, we are on track to treat 6 million people by the end of 2013.  This year, we have also reached over 700,000 HIV-positive pregnant women with antiretroviral drugs that will prevent them from passing the virus to their children.  As we meet these new targets, we are joined by a growing number of countries and the Global Fund for AIDS, Tuberculosis and Malaria, who share our commitment to doing more so that more may live.  As we continue this important work with our partners around the world and here at home, let us remember the lives we have lost to AIDS, celebrate the progress we have made, and, together, recommit to ourselves to achieving our shared vision of an AIDS-free generation.”

AIDS conference returns to U.S. at turning point

The world’s largest AIDS conference returned to the U.S. on Sunday with a plea against complacency at a time when the epidemic is at a critical turning point. “We can start to end AIDS,” one expert said.

There is no cure or vaccine yet, but scientists say they have the tools to finally stem the spread of this intractable virus – largely by using treatment not just to save patients but to make them less infectious, too.

“Future generations are counting on our courage to think big, be bold and seize the opportunity before us,” said Dr. Diane Havlir of the University of California, San Francisco, a co-chair of the International AIDS Conference.

The Obama administration calls the goal an AIDS-free generation, and U.S. Health and Human Services Secretary Kathleen Sebelius said what was “once a far-off dream, now is in sight.”

But the challenge that more than 20,000 scientists, doctors, people living with HIV and policy-makers will grapple with this week is how to make this promising science a practical reality. What combinations of protections work best in different regions, from AIDS-ravaged poor countries to hot spots in developed countries like the U.S.? With HIV increasingly an epidemic of the poor and the marginalized, will countries find the will to invest in the most vulnerable?

And where’s the money? The world spent $16.8 billion fighting AIDS in poor countries last year, but that’s still $7 billion a year shy of the amount needed to get the 15 million people most in need of treatment on drugs by 2015, the United Nations says. Eight million take them today.

Experts told the conference Sunday that a global recession and fatigue in the AIDS fight threaten those dollars.

“We must resolve together never to go backwards,” said Dr. Elly Katabira, president of the International AIDS Society.

Added Havlir, “It would be an extraordinary failure of global will and conscience if financial constraints truncated our ability to end AIDS just when the science has shown us that this goal is achievable.”

One key step in stemming HIV’s spread is to treat more infected pregnant women so they don’t spread the virus to their babies. Some 300,000 children were infected last year, but that number is steadiliy dropping.

UNAIDS chief Michel Sidibe put a face to that investment Sunday, introducing a mother from Nigeria who received U.S.-funded treatment that meant her daughter, now 13, was born without HIV.

“I do not want to be the lucky exception,” Florence Uche Ignatius told the crowd.

Added her daughter, Ebube Francis Taylor, “I want all children to be born just like me, free of HIV.”

But the hurdles are huge. Some 34.2 million now are living with HIV around the world. The epidemic is worst in developing countries, especially in Africa. Progress has stalled even in the U.S., which has seen about 50,000 new infections every year for a decade. Here, nearly 1.2 million people live with HIV, and one in five doesn’t know it. African-Americans are particularly hard-hit, accounting for about half of infections.

Getting medication is a problem for the poor here, too. Sebelius said the Obama administration had released nearly $80 million in grants this week to increase access to treatment, and is trying novel partnerships with community groups to help people stick with the medication daily for life. First up is a pilot program with the MAC AIDS Fund that will send text-message reminders about medication to young people living in the South.

The AIDS conference – remarkable for giving a forum not just to leading scientists but to people who live with HIV – hasn’t returned to the U.S. since 1990, in protest of the longtime ban on people with the virus entering the country. The Obama administration lifted the travel ban in 2010, finishing a process begun under the Bush administration. Not lifted was a ban on sex workers and injecting drug users, and protesters briefly interrupted the opening news conference to decry their absence from the meeting.

People living with HIV marched through downtown Washington Sunday to urge the public and policy-makers to pay attention to a disease that, in this country, doesn’t get much publicity anymore.

“We’re everyday people. Anybody and everybody can catch this,” said Ann Dixon, who traveled from North Little Rock, Ark., to attend the march. She learned she had HIV in 1997.

Activists, researchers foresee an AIDS-free generation

An AIDS-free generation: It seems an audacious goal, considering how the HIV epidemic still is raging around the world.

Yet more than 20,000 international HIV researchers and activists will gather in the U.S. capital later this month with a sense of optimism not seen in many years – hope that it finally may be possible to dramatically stem the spread of the AIDS virus.

“We want to make sure we don’t overpromise,” Dr. Anthony Fauci, the National Institutes of Health’s infectious disease chief, told The Associated Press. But, he said, “I think we are at a turning point.”

The big new focus is on trying to get more people with HIV treated early, when they’re first infected, instead of waiting until they’re weakened or sick, as the world largely has done until now. Staying healthier also makes them less likely to infect others.

“It saves lives of people who are infected, and it saves lives of people by not allowing them to get infected,” Fauci explained.

That’s a tall order. But studies over the past two years have shown what Fauci calls “striking, sometimes breathtaking results,” in preventing people at high risk of HIV from getting it in some of the hardest-hit countries, using this treatment-as-prevention and some other protections.

Now, as the International AIDS Conference returns to the U.S. for the first time in 22 years, the question is whether the world will come up with the money and the knowledge to put the best combinations of protections into practice, for AIDS-ravaged poor countries and hot spots in developed nations as well.

“We have the tools to make it happen,” said Dr. Elly Katabira, president of the International AIDS Society, which organizes the world’s largest HIV conference, set for July 22-27. He points to strides already in Botswana and Rwanda in increasing access to AIDS drugs.

But Fauci cautioned that moving those tools into everyday life is “a daunting challenge,” given the costs of medications and the difficulty in getting people to take them for years despite poverty and other competing health and social problems.

In the U.S., part of that challenge is complacency. Despite 50,000 new HIV infections here every year, an AP-GfK poll finds that very few people in the United States worry about getting the virus.

Also, HIV increasingly is an epidemic of the poor, minorities and urban areas such as the District of Columbia, where the rate of infection rivals some developing countries. The conference will spotlight this city’s aggressive steps to fight back: A massive effort to find the undiagnosed, with routine testing in some hospitals, testing vans that roam the streets, even free tests at a Department of Motor Vehicles office, and then rapidly getting those patients into care.

“These are the true champions,” Dr. Mohammed Akhter, director of the city’s health department, said of patients who faithfully take their medication. “They’re also protecting their community.”

A few miles east of the Capitol and the tourist-clogged monuments, the Community Education Group’s HIV testing van pulls into a parking lot in a low-income neighborhood with a particularly high infection rate. An incentive for the crowd at a nearby corner is the offer of a $10 supermarket gift card for getting tested.

Christopher Freeman, 23, is first in line. He was tested earlier this year and says showing off that official paper proclaiming him HIV-negative attracts “the ladies.”

“Forget money, it’s the best thing you can show them,” he said.

But that test was months ago, and Freeman admits he seldom uses condoms. He climbs into the van and rubs a swab over his gums. Twenty minutes later, he’s back for the result: Good news – no HIV. But counselor Amanda Matthews has Freeman go through a list of the risk factors; it’s education to try to keep him and his future partners safe.

“Just try to get yourself in the habit of using condoms,” she said. “You say it’s hard to use condoms but what if you do contract the virus? Then you’ve got to take medications every day.”

Freeman waves his new test result with a grin, and walks off with a handful of free condoms.

At a nearby bus stop, counselor Laila Patrick encounters a little resistance while handing out condoms, when a woman says that encourages sex outside of marriage.

“Stopping AIDS is everyone’s business. You’re looking out for the next person,” Patrick said. “You might just want to help someone be safe.”

About 34 million people worldwide have HIV, including almost 1.2 million Americans. It’s a very different epidemic from the last time the International AIDS Conference came to the United States, in 1990. Life-saving drugs emerged a few years later, turning HIV from a death sentence into a manageable chronic disease for people and countries that can afford the medications.

Yet for all the improvements in HIV treatment, the rate of new infections in the U.S. has held steady for about a decade. About 1 in 5 Americans with HIV don’t know they have it, more than 200,000 people who unwittingly can spread the virus.

Government figures show most new U.S. infections are among gay and bisexual men, followed by heterosexual black women. Of particular concern, African-Americans account for about 14 percent of the population but 44 percent of new HIV infections.

Where you live plays a role in your risk, too. Twelve cities account for more than 40 percent of the nation’s AIDS cases: New York, Los Angeles, Washington, Chicago, Atlanta, Miami, Philadelphia, Houston, San Francisco, Baltimore, Dallas and San Juan, Puerto Rico. Many are concentrated in specific parts of those cities.

“Maps tell the story,” said Brown University assistant professor Amy Nunn, who is beginning a campaign that will bring a testing van door-to-door in the hardest-hit areas of Philadelphia.

“It’s not just what you do, it’s also where you live. There’s just a higher chance that you will come into contact with the virus,” she explained.

Prospects for a vaccine are so far elusive and health disparities are widening, so why the optimism as expressed by the Obama administration’s goal of getting to an AIDS-free generation?

Consider the potential strategies, to add to tried-and-true steps such as condom use and treating HIV-infected pregnant women to protect their unborn babies:

• Studies found treatment-as-prevention could lower an HIV patient’s chance of spreading the virus to an uninfected sexual partner by a stunning 96 percent. In the U.S., new guidelines recommend starting treatment early rather than waiting until the immune system has weakened. Abroad, the United Nations hopes to more than double the number of patients being treated in poor countries to 15 million by 2015.

• Other studies show a longtime AIDS medication named Truvada can prevent infection, too, if taken daily by healthy people who are at risk from their infected sexual partners. The U.S. Food and Drug Administration is expected to decide by fall whether to formally approve sale of Truvada as an HIV preventive.

• A study from South Africa found a vaginal gel containing anti-AIDS medication helped protect women when their infected partners wouldn’t use a condom, generating more interest in developing women-controlled protection.

• Globally, experts also stress male circumcision, to lower men’s risk of heterosexually acquired HIV.

Testing is a key step in improving prevention. The AP-GfK poll found 57 percent of adults say they’ve been tested at some point, a bit higher than federal estimates, but not enough. The government recommends at least one test for adults, and that populations at higher risk get tested at least once a year.

Following those recommendations depends in part on people’s concern about AIDS. The poll found just over half of Americans consider HIV as much or more of a problem now than two decades ago. But less than 20 percent are worried about getting it themselves, and even populations at higher risk don’t consider HIV a big threat. Some 16 percent of black respondents said they’re very worried about HIV, compared with 4 percent of whites.

“We’ve become complacent about HIV in America, and it’s a real tragedy because hundreds of thousands of people in our own country aren’t getting the care they need,” said Chris Collins of amFAR, The Foundation for AIDS Research.

The drugs can cost up to $15,000 a year in the U.S., and overall treatment costs are rising as people with HIV live longer. In developing countries, those drugs can cost less than $400 a year.

The AP-GfK Poll was conducted June 14-18 by GfK Roper Public Affairs and Corporate Communications. It involved landline and cellphone interviews with 1,007 adults nationwide. Results for the full sample have a margin of sampling error of plus or minus 4.0 percentage points.

In the U.S., the government is targeting the hardest-hit communities as part of a plan to reduce HIV infections by 25 percent by 2015, said Assistant Secretary of Health Howard Koh. Work is under way to learn the best steps to get people treated early, including in cities such as Washington, where 2.7 percent of residents have HIV, roughly four times the national rate.

Washington resident Zee Turner knows it’s hard to stick with care. She’s had HIV for two decades, learning the news when her baby was born sick. Health workers helped mom and daughter receive then-newly emerging treatments, and they’re doing well today.

“I felt that I should get out here and try to help somebody else, because somebody had to help us get into care,” said Turner, now 53 and a community health worker.

The city’s latest HIV count suggests progress, with a slight decrease in new diagnoses and a majority of patients being connected with medical care. Community workers such as Turner are called to try to help people stay on treatment when other problems intervene.

“If they’re on drugs, I take them to the drug program. If they need help going on Medicaid, I go with them to Medicaid,” Turner said. “Any problem they have, I’m going to try to fix it and get them back into care.”

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