Laboratorio Of Referencia Nacional Para Hepatites Virais

Brazil

Laboratorio Of Referencia Nacional Para Hepatites Virais

Brazil

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Soares C.C.,Laboratorio Of Virologia Molecular | Georg I.,IPEC Inc | Lampe E.,Laboratorio Of Referencia Nacional Para Hepatites Virais | Lewis L.,Laboratorio Of Referencia Nacional Para Hepatites Virais | And 8 more authors.
PLoS ONE | Year: 2014

Background: Men who have sex with men (MSM) are more vulnerable to blood-borne infections and/or sexually-transmitted infections (STI). This study was conducted to estimate the prevalences of mono and co-infections of HIV-1 and other blood-borne/STIs in a sample of MSM in Campinas, Brazil. Methods: Responding Driven Sampling (RDS) was used for recruitment of MSM. Serum samples collected from 558 MSM were analyzed for the presence of serological markers for HIV-1, HBV, HCV, HTLV, HPV-16/18, and T. pallidum infections. Results: The highest prevalences of infection in serum samples were found for HPV-16 and 18 (31.9% and 20.3%, respectively). Approximately 8% of the study population showed infection with HIV-1, and within that group, 27.5% had recently become infected with HIV-1. HBV infection and syphilis were detected in 11.4% and 10% of the study population, respectively, and the rates of HTLV and HCV infection were 1.5% and 1%, respectively. With the exception of HTLV, all other studied infections were usually found as co-infections rather then mono-infections. The rates of co-infection for HCV, HPV-18, and HIV-1 were the highest among the studied infections (100%, 83%, and 85%, respectively). Interestingly, HTLV infection was usually found as a mono-infection in the study group, whereas HCV was found only as a co-infection. Conclusions: The present findings highlight the need to educate the MSM population concerning their risk for STIs infections and methods of prevention. Campaigns to encourage vaccination against HBV and HPV could decrease the rates of these infections in MSM. © 2014 Soares et al.


Potsch D.V.,Federal University of Rio de Janeiro | Camacho L.A.B.,ENSP Fiocruz | Tuboi S.,Federal University of Fluminense | Villar L.M.,Laboratorio Of Referencia Nacional Para Hepatites Virais | And 6 more authors.
Vaccine | Year: 2012

Background: Antibody responses to standard regimens of hepatitis B (HBV) vaccination are lower in HIV-infected subjects and the best hepatitis B vaccine schedule in this population is not known. Objective: To assess the immunogenicity and to evaluate predictors of serologic response of a modified regimen of a HBV recombinant vaccine in a cohort of HIV-infected subjects. Methods: HIV-infected subjects received 4 doses (40 μg) of a recombinant HBV vaccine at 0, 1, 2 and 6 months. Demographic information as well as CD4 cell count and plasma viral load were assessed at baseline. Protective and strong responses were defined as an anti-HBs titer ≥10. mIU/mL and ≥100. mIU/mL, respectively and were evaluated one month after the third and the fourth doses. Results: 163 HIV-infected individuals were evaluated 67 (40%) were male and median age was 37 years. Median CD4 cell count was 385cells/mm3 and 113 (70%) had undetectable HIV-1 viral load. Protective antibody response was observed in 83 and 91% and a strong antibody response was observed in 62 and 80% of the subjects after 3 and 4 doses, respectively. In a multivariate logistic model undetectable HIV-1 viral load and higher CD4 cell counts were independent predictors of a strong antibody response after 4 doses. Patients with undetectable HIV viral load were almost 3 times more likely to have anti-HBs titers above 100. mIU/mL than those with detectable viral load. Conclusions: A 4-double-dose regimen of a recombinant HBV vaccine increased response rates and determined higher antibody titers which may translate in prolonged protection agains HBV. Inclusion of a fourth dose of HBV vaccine for HIV-infected subjects should be considered in the public health setting. © 2012 Elsevier Ltd.

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