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Susceptibility experiments with a strain of Wuchereria bancrofti (Cobbold) from Bora Bora in the Society Islands showed that development to advanced or infective stages occurred in the following United States mosquitoes: Culex pipiens, C. quinquefasciatus, C. erraticus, C. salinarius, Anopheles walkeri, A. punctipennis, Aedes triseriatus, A. aegypti, A. atropalpus, and Mansonia perturbans. Taking into consideration the habits and prevalence of the species, it was concluded that only Culex pipiens (83.5 per cent infected) and possibly Culex quinquefasciatus (34.9 per cent infected) were sufficiently susceptible to be dangerous potential vectors.
Anopheles quadrimaculatus, A. freeborni, Aedes atlanticus (or tormentor), and Psorophora ferox failed to develop the infection beyond the early first larval stage.
* Contribution from the National Institute of Health and the Moore General Hospital U. S. Army.
1 U. S. Public Health Service, National Institute of Health, Division of Infectious Diseases.
2 Major, Medical Corps, Army of the United States.
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