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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 97, No. 2, 2002, pp. 197-198
Bioline Code: oc02036
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 97, No. 2, 2002, pp. 197-198

 en SHORT COMMUNICATION - Relation between Hepatitis B Carrier Status and Antibody against Synthetic Plasmodium falciparum check for this species in other resources Erythrocyte Surface (pf155 - RESA) Antigen
Francisco José Dutra Souto; Cor Jésus Fernandes Fontes & Ana Maria Coimbra Gaspar

Abstract

A survey on Plasmodium check for this species in other resources infection was carried out in gold mine camps located in the Brazilian Amazon. Antibody against P. falciparum check for this species in other resources ring-infected erythrocyte surface antigen (RESA) was quantified by an enzyme-immunoassay in order to assess P. falciparum exposure. Hepatitis B, a common infection in this area, was also investigated by serologic markers. Among 520 sampled subjects, 517 (99.4%) admitted previous symptomatic malaria, 106 (20.4%) had positive thick smears for malaria, 82.9% had HBV markers, and 7.1% were HBsAg positive. Anti-RESA titers was significantly lower in HBV carriers than in people with resolved HBV infection suggesting that the anti-RESA immune response could be supressed by HBV carrier status. Moreover, immunedeficient responses to both infections may take place in some subjects causing concomitant lower anti-RESA response and incapacity to clear HBV.

Keywords
malaria falciparum - malaria antigen - hepatitis B virus - Brazilian Amazon

 
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