| [seroprevalence of infection by st. louis encephalitis virus in the province of formosa]. | the aim of this work was to determine the prevalence of antibodies against st. louis encephalitis virus (sle) in human sera provided by the laboratory of epidemiological surveillance from formosa district (province of formosa, argentina) in 1995 and 1997. the tests used for this study were hemagglutination inhibition (hi) and neutralization (nt). the screening performed by nt test showed prevalences of 21% (60/284) and 32% (50/157) of antibodies in samples obtained in 1995 and 1997 respectively. ... | 2000 | 11188954 |