Background Reinvasion by Aedes aegypti of cities in the Americas poses a threat of urbanisation of yellow fever.
After detection of yellow-fever infection in a resident of the city of Santa Cruz, Bolivia, in December, 1997, we investigated all subsequent suspected cases.
Methods We introduced active surveillance of yellow fever in the Santa Cruz area.
Hospitals and selected urban and rural health centres reported all suspected cases.
Patients were serologically screened for yellow fever, dengue, hepatitis A and B, and leptospirosis.
We collected clinical and epidemiological information from patients'records and through interviews.
We also carried out a population-based serosurvey in the neighbourhood of one case.
Findings Between December, 1997, and June, 1998, symptomatic yellow-fever infection was confirmed in six residents of Santa Cruz, five of whom died.
Five lived in the southern sector of the city.
Two had not left the city during the incubation period, and one had visited only an area in which sylvatic transmission was deemed impossible.
Of the 281 people covered in the serosurvey 16 (6%) were positive for IgM antibody to yellow fever.
Among five people for whom this result could not be explained by recent vaccination, there were two pairs of neighbours.
Interpretation Urban transmission of yellow fever in Santa Cruz was limited in space and time. (...)
Mots-clés Pascal : Fièvre jaune, Arbovirose, Virose, Infection, Homme, Milieu urbain, Bolivie, Amérique du Sud, Amérique, Epidémiologie, Surveillance sanitaire, Evaluation, Dépistage, Transmission homme homme, Recommandation, Immunisation
Mots-clés Pascal anglais : Yellow fever, Arbovirus disease, Viral disease, Infection, Human, Urban environment, Bolivia, South America, America, Epidemiology, Sanitary surveillance, Evaluation, Medical screening, Transmission from man to man, Recommendation, Immunization
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0269259
Code Inist : 002B05C02I1B. Création : 16/11/1999.