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CDC: Opioid use helping drive spread of hepatitis C

CDC researchers say a tripling of hepatitis C patients from 2010 to 2016 was traced mostly to an increase in injection drug use among young people addicted to heroin and other opioids. Photo by Maxal Tamor/Shutterstock

By Amy Norton, HealthDay News

More than 2 million Americans have hepatitis C -- and the opioid epidemic is a major contributor to the problem, according to a new government study.

The study, by the U.S. Centers for Disease Control and Prevention, does highlight progress against the potentially fatal liver disease. It also shows how much more work remains, CDC officials said.

Between 2013 and 2016, the agency estimated, nearly 2.4 million Americans had hepatitis C infections.

That's a small decline from previous years. And the CDC said that may indicate the effects of new therapies that have changed the face of hepatitis C treatment in the past several years.

But it's also likely that deaths among older Americans with the infection account for part of the decline, the agency added.

And while better treatment may be making a dent in hepatitis C cases, the new figures show that most Americans with the infection had not yet benefited by the end of 2016.

Meanwhile, there are ominous signs when it comes to hepatitis C prevention.

Earlier CDC research found that new hepatitis C cases tripled between 2010 and 2016. Most were traced to injection-drug use among younger adults addicted to heroin and other opioids. Adults under 40 have the highest rate of new infections.

"The opioid crisis is sabotaging our progress against hepatitis C," said the CDC's Dr. Jonathan Mermin, who worked on the new study.

Hepatitis C is a viral infection that causes inflammation in the liver. In most cases, the infection becomes chronic. Without treatment, about 15 percent to 30 percent of people with chronic hepatitis C will develop cirrhosis (scarring) of the liver, according to the CDC. Some of those also develop liver cancer.

These days, most people become infected by sharing injection-drug equipment, said Dr. Judith Feinberg, an infectious disease expert who was not involved in the study.

Baby boomers -- people born between 1945 and 1965 -- account for most hepatitis C cases in the United States. But the opioid crisis is putting a "whole new generation" of Americans at risk, said Feinberg, chairwoman-elect of the HIV Medicine Association.

Feinberg noted that West Virginia, which has been hard-hit by the opioid epidemic, has the nation's second-highest rate of acute hepatitis C infections.

It's a worrisome trend that has evolved at the same time as breakthroughs in chronic hepatitis C treatment, Feinberg said.

For decades, the only treatment for hepatitis C involved the injection drug interferon -- a year-long regimen that often caused fatigue and flu-like side effects. Even then, the cure rate was 40 percent to 50 percent, according to the U.S. Food and Drug Administration.

But in the past several years, new oral drugs to fight hepatitis C have been approved -- all with cure rates that top 90 percent after two or three months of treatment.

"We can cure it now, which is wonderful," Feinberg said.

The problem has been access to treatment, Mermin said. Many people who have hepatitis C don't know it, because they haven't been tested.

The CDC recommends testing for baby boomers and for anyone who has ever abused injection drugs, Mermin said.

Then there is the huge price tag of treatment. The first of the new drugs to hit the market -- including Sovaldi and Harvoni -- cost as much as $95,000 for a full round of treatment.

State Medicaid programs, which cover many Americans with hepatitis C, balked at the cost and set up restrictions, Feinberg said. Generally, only people with more-severe liver damage could get the drugs -- when it was too late to prevent hep C complications.

But shifts are taking place, Feinberg said. Increased competition is bringing costs down; the cost of a cure can be $15,000 to $25,000 now, she noted.

"A number of state Medicaid programs have moved to no restrictions, or looser restrictions," Feinberg said.

Ideally, though, hepatitis C should be prevented. Both Mermin and Feinberg pointed to "syringe service programs" as one strategy. The community programs offer injection-drug users clean equipment, to help prevent infections; they can also link people to drug abuse treatment and infection testing, Mermin said.

But a CDC study last year found that only three U.S. states have laws that "support full access" to both syringe service programs and hepatitis C treatment.

The new findings were published online Nov. 6 in the journal Hepatology.

More information
The CDC has more on hepatitis C.

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