Experiments to Determine Potential Mosquito Vectors of Wuchereria Bancrofti in the Continental United States
| Autor: | Walter L. Newton, Ivan Pratt |
|---|---|
| Rok vydání: | 1946 |
| Předmět: |
Psorophora
biology Ecology fungi Intermediate host Zoology biology.organism_classification medicine.disease_cause United States Filariasis Culicidae Infectious Diseases Wuchereria bancrofti Aedes canadensis Virology parasitic diseases Culex pipiens medicine Anopheles crucians Animals Humans Parasitology Psorophora ciliata Mansonia |
| Zdroj: | The American Journal of Tropical Medicine and Hygiene. :699-706 |
| ISSN: | 1476-1645 0002-9637 |
| DOI: | 10.4269/ajtmh.1946.s1-26.699 |
| Popis: | Summary and Conclusions Studies to determine possible mosquito vectors of Wuchereria bancrofti (nocturnally-periodic strain) in the United States were continued. A total of 1314 dissections was made of mosquitoes from 14 species. Seventy-eight per cent of Culex pipiens examined 9½ days or longer after infection contained infective larvae, and an additional 13 per cent contained larvae in late stages of development. A total infectibility rate of 91 per cent was obtained with this species. Thirty-three per cent of Psorophora discolor in late dissections contained infective larvae, and an additional 34 per cent contained larvae in late stages of development. The infectibility rate of this species was 67 per cent. Occasional development of the larvae to advanced or infective stages was observed in the following species: Culex salinarius, 3 per cent; Anopheles crucians, 2 per cent; Aedes thibaulti, 3 per cent. No development beyond the first stage was observed in Anopheles quadrimaculatus, Anopheles maculipennis freeborni, and Psorophora ciliata. Studies were not completed on Aedes canadensis, Culex erraticus, Mansonia perturbans, and Psorophora cyanescens. However, on the basis of 50 or more late dissections of each species, none of these was a good intermediate host with the exception of Culex erraticus which permitted development of the larvae to late and infective stages in 14 of 49 specimens. The few dissections obtained of Psorophora ferox and P. howardii were negative. It is concluded that Culex pipiens and Psorophora discolor are capable of serving as vectors of Wuchereria bancrofti should other conditions prevail for the spread of the parasite. Incomplete studies on Culex erraticus indicate that this species also might be involved as a transmitter although to a lesser extent. C. salinarius, Anopheles crucians, and Aedes thibaulti might serve as occasional vectors, although their low infectibility rates preclude their playing a major role in the spread of the disease. Anopheles quadrimaculatus, A. maculipennis reeborni, and Psorophora ciliata are incapable of transmitting infection. Finally, although studies are not completed, it is apparent that Aedes canadensis, Mansonia perturbans, and Psorophora cyanescens could not serve as vectors of Wuchereria bancrofti. |
| Databáze: | OpenAIRE |
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