Smallness of the panmictic unit of Triatoma infestans (Hemiptera: Reduviidae).
J Med Entomol
; 35(6): 911-7, 1998 Nov.
Article
em En
| MEDLINE
| ID: mdl-9835679
ABSTRACT
The population genetic structure of Triatoma infestans (Klug), the principal vector of the causative agent of Chagas disease in Bolivia, was investigated by enzyme electrophoresis at 15 loci, of which 3 were polymorphic. A total of 1,286 adults and nymphs was collected from 19 localities of the Cochabamba (high endemicity) and La Paz (low endemicity) departments. Previous results were confirmed, including a low level of polymorphism (0.20), low genetic distance between geographic areas, and a population structure compatible with an isolation by distance model. However, a high proportion (26.3%) of the surveyed localities showed a significant excess of homozygotes, disputing previous conclusions that considered the village as the probable panmictic unit. The excess of homozygotes was reduced when smaller subunits, such as individual houses or chicken coops, were considered, indicating a Wahlund effect.
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Base de dados:
MEDLINE
Assunto principal:
Triatoma
/
Genética Populacional
Tipo de estudo:
Prognostic_studies
Limite:
Animals
/
Humans
País como assunto:
America do sul
/
Bolivia
Idioma:
En
Ano de publicação:
1998
Tipo de documento:
Article