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NEW YORK (Reuters Health) - Hepatitis C has surpassed HIV for example a killer of U.S. adults, and screening wholly "baby boomers" could be one practice to stem the problem, according to two new government studies.

Hepatitis C is a liver pest caused by a virus of the same name that is usually passed end contact with infected blood. An estimated 75 to 85 percent of infections be transformed into chronic, which can eventually cause demure diseases like cirrhosis (scarring of the liver) and liver cancer.

In common of the new studies, researchers at the Centers because of Disease Control and Prevention (CDC) set that by 2007, hepatitis C was killing else Americans than HIV -- the virus that causes AIDS.

In 2007, hepatitis C killed 15,100 Americans, accounting as being 0.6 percent of all deaths that year. That compared by a little over 12,700 deaths kindred to HIV.

Those numbers are based adhering death certificates, and almost certainly misprize the real scope, according to the CDC. Compared by HIV, hepatitis C infection is greater amount of likely to still be unrecognized at the time of a body's death.

"Hepatitis C mortality has, regrettably, been ~ward the rise for a number of years," afore~ Dr. John Ward, director of the CDC's viral hepatitis distribution and an author of the commencing study.

But, he told Reuters Health, "many of those deaths could be prevented."

Of the estimated 3.2 the public Americans with chronic hepatitis infection, not far from half of them don't comprehend it, according to the CDC.

That's for the reason that the initial infection causes no symptoms in in the greatest degree cases. Instead, the virus silently damages the liver over the years, and clan may only discover they are infected whereas they develop irreversible liver cirrhosis.

Chronic hepatitis C is ut~ common in "baby boomers" -- about brace thirds of U.S. infections are in humbler classes born between 1945 and 1964, Ward's team notes in their state, which is published in the Annals of Internal Medicine.

That dominance among boomers has a lot to work out with casual injection-drug use back in the 1960s, 70s and 80s, inasmuch as sharing tainted needles is a major route for passing on the venom.

Some people also contracted hepatitis C through house transfusions during that era. Since 1992, the whole of blood donations in the U.S. be obliged been tested for hepatitis C.

Baby boomers by hepatitis C are now getting to every age where the consequences of the contagion would be evident, said Dr. Harvey Alter, a researcher through the National Institutes of Health who wrote one editorial on the new studies.

"The massy issue is that most people through chronic infection are still not identified," Alter told Reuters Health.

Right at this time, health officials recommend that certain nation at increased risk have blood tests to exist screened for hepatitis C. That includes anyone who's used injection drugs, people who received blood transfusions or organ transplants before 1992 and people through HIV.

"But that approach hasn't been self-same effective," Alter said.

Another option, Ward before-mentioned, would be to screen all baby boomers.

Experts are only seriously considering that option now because of newly come advances in hepatitis C treatment.

Before 1990, the corruption was virtually incurable. Then researchers ground that a combination of two medicines, interferon and ribavirin, could boost the method of treatment rate to 45 percent ("cure" design the virus is cleared from the carcass).

The downside is that the preservation of health is hard to take. Interferon has to subsist injected, and the whole treatment course takes about a year. The drugs have power to also have side effects ranging from flu-like symptoms to be motionless problems to depression.

Less than a year ago, the U.S. approved two new oral drugs that, when added to the good for nothing regimen, send the cure rate to 70 percent. Adding one or the other one of the drugs -- boceprevir (sold for the re~on that Victrelis in the U.S.) or telaprevir (Incivek in the U.S.) -- have power to also cut the treatment time to not far from six months in some people.

The verge effects are still there with the treble-drug approach. But with the eminently possibility of a cure, more persons with chronic hepatitis C may absence treatment, both Ward and Alter afore~.

So in a second study, the CDC researchers estimated the cost-effectiveness of doing one-time hepatitis C screening in altogether Americans born between 1945 and 1965.

They calculated that compared by the "status quo," screening baby boomers would gripe an extra 808,580 cases of hepatitis C, at a cost of almost $2,900 for one and the other one.

Ultimately, screening would prevent an extra 82,000 deaths, the CDC estimates -- haughty a certain percentage of people agree to handling with interferon and ribavirin.

As alienated as cost-effectiveness, Ward said, that would entice baby-boomer screening in line through other widely accepted types of screening, like tests because colon cancer and high blood compressing.

If screened people received one of the recent hepatitis C drugs, that would keep even more lives -- an additional 121,000 by current screening policy, the CDC says. But the require to be paid would be greater, since both fresh drugs are very expensive.

Incivek costs penuriously $50,000 for the whole methodical arrangement, while Victrelis rings up at roughly $26,000 to $48,000 depending without ceasing the duration of treatment.

Still, Alter, who supports baby boomer screening, said the approach looks to exist "very cost-effective" -- especially when compared to the costs of treating cirrhosis and liver cancer, what one. are the most common reasons ~ the sake of liver transplants.

"The beauty of this is, it's six months to person year of treatment," Alter said.

Both Alter and Ward besides pointed to other medications now in the drug industry's pipeline that are aimed at anger interferon injections out of the equation.

"Hopefully, we'll readily have oral therapies that are easier to take and be in possession of fewer adverse effects," Alter said.

For very lately, the screening focus in the U.S. is up~ the body baby boomers. Whether it could have ~ing a good idea in younger generations is not light.

New hepatitis C infections in the U.S. are prostrate sharply since the 1980s, according to a CDC study published latest year.

In the mid-1980s, roughly 70 of every million Americans developed acute hepatitis C cropped land year. Between 1994 and 2006, that fixed measure was 90 percent lower: only seven by million per year.

As it stands, there are roughly 18,000 new hepatitis C infections both year -- most of which occur in injecting-drug users.

SOURCE: and Annals of Internal Medicine, February 21, 2012.

(This fabrication update clarifies that Victrelis and Incivek are U.S. brand names, in paragraph 21)

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