Embryonic development of human lice: rearing conditions and susceptibility to spinosad
Mem. Inst. Oswaldo Cruz
;
101(3): 257-261, May 2006. tab, graf
Article
in English
| LILACS
| ID: lil-431722
RESUMO
The embryonic development of human lice was evaluated according to the changes in the morphology of the embryo observed through the transparent chorion. Based on ocular and appendage development, three stages of embryogenesis were established early, medium, and late. Influence of temperature and relative humidity (RH) on the laboratory rearing of Pediculus humanus capitis eggs was assessed. The optimal ranges for temperature and RH were 27-31°C and 45-75%. The susceptibility of human louse eggs to insecticide spinosad (a macrocyclic lactone) was assessed by immersion method. The results showed similar susceptibility to spinosad in early, medium, and late stages of head lice eggs. In addition, this study showed similar susceptibility of head and body lice eggs to spinosad, an insecticide that has not been used as pediculicide in Argentina (lethal concentration 50 0.01%).
Full text:
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Index:
LILACS (Americas)
Main subject:
Pediculus
Limits:
Animals
/
Humans
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
Tropical Medicine
/
Parasitology
Year:
2006
Type:
Article
Affiliation country:
Argentina
Institution/Affiliation country:
Centro de Investigaciones de Plagas e Insecticidas/AR
/
Universidad Nacional de General San Martín/AR
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