Epidemiology of Chagas disease in Guatemala: infection rate of Triatoma dimidiata, Triatoma nitida and Rhodnius prolixus (Hemiptera, Reduviidae) with Trypanosoma cruzi and Trypanosoma rangeli (Kinetoplastida, Trypanosomatidae)
Mem. Inst. Oswaldo Cruz
;
98(3): 305-310, Apr. 2003. tab
Artigo
em Inglês
| LILACS
| ID: lil-340106
RESUMO
A five-year domiciliary collection in the 22 departments of Guatemala showed that out of 4,128 triatomines collected, 1,675 were Triatoma dimidiata (Latreille, 1811), 2,344 were Rhodnius prolixus Stal 1859, and only 109 were T. nitida Usinger 1939. The Chagas disease parasite, Trypanosoma cruzi, was found in all three species. Their natural infection rates were similar in the first two species (20.6 percent; 19.1 percent) and slightly lower in T. nitida(13.8 percent). However there was no significant difference in the infection rates in the three species (p = 0.131). T. dimidiata males have higher infection rates than females (p = 0.030), whereas for R. prolixus there is no difference in infection rates between males and females (p = 0.114). The sex ratios for all three species were significantly skewed. More males than females were found inside houses for T. dimidiata (p < 0.0001) and T. nitida (p = 0.011); a different pattern was seen for R. prolixus (p = 0.037) where more females were found. Sex ratio is proposed as an index to show the mobility of T. dimidiata in different populations. T. dimidiata is widely distributed in the country, and is also the main vector in at least ten departments, but R. prolixus with higher vectorial capacity is an important vector in at least two departments
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Triatoma
/
Trypanosoma cruzi
/
Doença de Chagas
/
Insetos Vetores
Tipo de estudo:
Estudo de rastreamento
Limite:
Animais
/
Feminino
/
Humanos
/
Masculino
País/Região como assunto:
América Central
/
Guatemala
Idioma:
Inglês
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
Medicina Tropical
/
Parasitologia
Ano de publicação:
2003
Tipo de documento:
Artigo
País de afiliação:
Guatemala
/
Japão
Instituição/País de afiliação:
Japanese International Cooperation Agency/JP
/
Universidad de San Carlos/GT
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