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Researchers look for culprit behind oral health problems in HIV-positive patients
Date:2/20/2014

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While even a healthy mouth is full of bacteria - in fact, more than 600 species play a role in keeping the mouth healthy Vazquez and De Rossi suspect a different set of bacteria set up shop in these patients.

Vazquez's lab also will be analyzing the different types of yeast recovered from study patients to determine if HIV patients have more aggressive or treatment-resistant strains.

"One of the earliest signs of HIV can be a yeast infection in the mouth," said Vazquez. In the worst case scenario, this fungal infection can quickly spread into and block the esophagus. "They can't swallow, they can't drink, they can't eat, and so they dehydrate," he said. In fact, when De Rossi sees a patient with an oral yeast infection, he may suggest an HIV test, after ruling out more common causes such as taking an antibiotic for an upper respiratory infection.

While mostly responsive to antifungal drugs, a few missed doses can give the fungus the opportunity to develop a protective film of sugar, called a biofilm, and become treatment resistant. "To successfully treat a yeast infection, you need a combination of some kind of host immune response and the antifungal medication," Vazquez noted.

HPV, more commonly known as a cause of cervical cancer, was actually not a significant problem in HIV patients until the advent of highly-active antiretroviral therapy, said De Rossi, a study co-investigator. But once it has found a home, the virus can move quickly throughout the mouth and beyond as patients inadvertently bite the area enabling its spread. Treatment tends to work marginally and the virus often resurfaces, spreads, and can cause head and neck cancer.

"We don't know a lot about the evolution of HPV in the mouth of anybody," Vazquez added. "We have to characterize this HPV infection and how it advances in HIV patients from a state of colonization to a tiny lesion, to a little wart, to maybe head and neck cancer that requ
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Contact: Toni Baker
tbaker@gru.edu
706-721-4421
Medical College of Georgia at Georgia Regents University
Source:Eurekalert  

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