Geographic information systems and the environmental risk of schistosomiasis in Bahia, Brazil.
Am J Trop Med Hyg
; 60(4): 566-72, 1999 Apr.
Article
en En
| MEDLINE
| ID: mdl-10348229
A geographic information system was constructed using maps of regional environmental features, Schistosoma mansoni prevalence in 30 representative municipalities, and snail distribution in Bahia, Brazil to study the spatial and temporal dynamics of infection and to identify environmental factors that influence the distribution of schistosomiasis. Results indicate that population density and the duration of annual dry period are the most important determinants of prevalence of schistosomiasis in the areas selected for study. Maximum rainfall, total precipitation during three consecutive months, annual maximum or minimum temperatures, and diurnal temperature difference were not shown to be significant factors influencing S. mansoni prevalence in local populations or distribution of snail hosts. Prevalence of the disease was highest in the coastal areas of the state. Higher prevalence tended to occur in areas with latossolo soil type and transitional vegetation.
Buscar en Google
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Esquistosomiasis
/
Biomphalaria
/
Sistemas de Información
Tipo de estudio:
Etiology_studies
/
Prevalence_studies
/
Prognostic_studies
/
Risk_factors_studies
Límite:
Animals
/
Humans
País/Región como asunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Am J Trop Med Hyg
Año:
1999
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
Estados Unidos