Oral sex is the main form of transmission of HPV

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HPV, The Human Papilloma Virus

Oral sex is the main form of transmission of HPV among the interviewees

Research has evaluated 1.300 people's injuries and tumors in the head and neck.

São Paulo - A new study conducted by the University of São Paulo's School of Public Health shows that 72% of head and neck cancer cases present the virus HPV, mostly transmitted in unprotected sex.

Oral sex without Condom would be the main route of transmission of HPV

Experts warn that the relationship between this virus and tumors in the tongue, throat and pharynx is through oral sex without Condom. The new research, released by Agência FAPESP, was done with 1.475 Brazilian patients.

"We performed two types of tests to verify the prevalence of HPV among the 1.475 patients: serology and DNA analysis, "said Rossana Veronica Mendoza López, author of the analysis.

Considering the results only for the HPV of the 16 type - most related to the development of head and neck cancer among the existing 200 virus types -, the prevalence of positive cases among study patients was 72%. In the earliest assessments made between the 1998 and 2003 years, the index found was 55%, an increase of 17 percentage points.

Less lethal

When analyzing the survival of the patients, the scientists observed that, among those that presented a positive result for the HPV, the mortality was 38% lower.

"International studies have shown that HPV has more relation with oropharyngeal tumors. The results of our study suggest, therefore, that cases of head and neck cancer with HPV present higher survival, that is, they have a better prognosis. But we still do not know for sure why, "said Lopez.

Victor Wünsch Filho, professor and research supervisor, the demographic profile and life habits of the patients who presented a positive result for the HPV 16 is a possible explanation for the best prognosis.

"They form a group of younger patients with a higher proportion of women and a lower proportion of smokers. These data merit further analysis, "Wünsch said.

According to Lopez, although the evidence indicates that HPV is becoming a more common cause of head and neck cancer, tobacco and alcohol consumption still account for most cases.

THE ONLINE DAY - RJ | SCIENCE AND HEALTH

DST, AIDS AND VIRAL HEPATITES

04/07/2012

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