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Man Dies After Parasitic Worms Invade Lungs
Date:3/20/2013

By Randy Dotinga
HealthDay Reporter

WEDNESDAY, March 20 (HealthDay News) -- A Vietnamese immigrant in California died of a massive infection with parasitic worms that spread throughout his body, including his lungs. They had remained dormant until his immune system was suppressed by steroid drugs used to treat an inflammatory disorder, according to the report.

The 65-year-old man was apparently infected by the worms in Vietnam, one of many countries in the world where they're known to infect humans. About 80 percent to 90 percent of people die if they are infected by the worm species and then suffer from so-called "hyperinfection" as the worms travel through their bodies, said report co-author Dr. Niaz Banaei, an assistant professor of infectious diseases at Stanford University School of Medicine.

The man's case emphasizes the importance of testing patients who might be infected with the parasite before giving them drugs to dampen the immune system, said Dr. Peter Hotez, dean of the National School of Tropical Medicine at Baylor College of Medicine, who's familiar with the report findings.

"You have to think twice before starting big doses of steroids," Hotez said. "The problem is that most physicians are not taught about this disease. It often does not get recognized until it's too late."

Parasitic worms of the Strongyloides stercoralis species are most commonly found in tropical and subtropical areas of the world, although they've also appeared in the Appalachian region of the United States. Typically, they infect people in rural areas such as Brazil, northern Argentina and Southeast Asia, Hotez noted, and may currently infect as many 100 million people worldwide.

The worms live in the ground or water, typically in places with poor sanitation, and infect humans by penetrating the skin. They may live in the intestines for years or even decades, creating new larvae that grow into worms abou
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