Influence of temperature and humidity on the biology of Triatoma mexicana (Hemiptera: Reduviidae: Triatominae) under laboratory conditions
Mem. Inst. Oswaldo Cruz
; 103(7): 719-723, Nov. 2008. tab
Artigo
em Inglês
| LILACS
| ID: lil-498382
Biblioteca responsável:
BR1.1
ABSTRACT
Several biological parameters related to the Triatoma mexicana life-cycle were evaluated in this study. Three cohorts were maintained under different combinations of temperature and relative humidity (RH) 25ºC/50 percent RH; 25ºC/75 percent RH; and 30ºC/75 percent RH. Observed hatching rates varied from 49-57.5 percent whereas the average time of hatching varied from 19.5-22.7 days. In the three cohorts studied, the mean time-lapse between presentation of the blood meal and the beginning of feeding was less than 5 min in all instars; the mean feeding time was longer than 10 min in all the instars; the post-feed defecation delay was over 10 min in all the instars. Less than 50 percent of nymphs in each cohort completed the cycle and the average time from 1st instar nymph to adult was more than 255 days for the three cohorts. The number of blood meals before molt at each nymphal instar varied from 1-9. Our results appear to indicate a lack of influence of temperature and RH on the biological parameters of T. mexicana that were studied, which could reflect the adaptation capacity of this species. We also conclude that T. mexicana can not be considered an effective transmitter of Trypanosoma cruzi to human populations in areas where this species is currently present.
Texto completo:
Disponível
Coleções:
Bases de dados internacionais
Base de dados:
LILACS
Assunto principal:
Temperatura
/
Triatoma
/
Umidade
Limite:
Animais
País/Região como assunto:
México
Idioma:
Inglês
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
Medicina Tropical
/
Parasitologia
Ano de publicação:
2008
Tipo de documento:
Artigo
País de afiliação:
México
Instituição/País de afiliação:
Instituto Politécnico Nacional, Carpio y Plan de Ayala/MX
/
Universidad Nacional Autónoma de México/MX
/
Universidad de Guadalajara/MX