Epidemiology and population dynamics of Ascaris lumbricoides and Trichuris trichiura infection in the same community.
Trans R Soc Trop Med Hyg
; 81(6): 987-93, 1987.
Article
em En
| MEDLINE
| ID: mdl-3503421
The gastrointestinal helminth infection status of an age-stratified sample from a single Caribbean community was assessed using anthelmintic expulsion techniques. The same sample was re-assessed in a similar manner after a 17 month period of re-infection. The age-prevalence profile of Ascaris lumbricoides was convex while that of Trichuris trichiura was asymptotic. The age-intensity profiles of both species were convex. These differing patterns are attributed to differences in the absolute worm burdens of the 2 species. The frequency distributions of infection intensity were similar for both species, and largely independent of host age. The basic reproductive rate of A. lumbricoides (Ro = 1-1.8) was similar to that recorded elsewhere and much lower than that of T. trichiura (Ro = 4-6), implying that the latter is intrinsically more resistant to control. Individual hosts were predisposed to high (or low) intensity infection with either species, although predisposition to both species simultaneously was not conclusively demonstrated. Further studies are required to determine the cause of these observations.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ascaríase
/
Tricuríase
Tipo de estudo:
Risk_factors_studies
/
Screening_studies
Limite:
Adolescent
/
Adult
/
Animals
/
Child
/
Child, preschool
/
Humans
/
Infant
/
Middle aged
País/Região como assunto:
Caribe
Idioma:
En
Revista:
Trans R Soc Trop Med Hyg
Ano de publicação:
1987
Tipo de documento:
Article
País de publicação:
Reino Unido