Abstract
Nyssomyia intermedia is an important vector of American cutaneous leishmaniasis. Sand flies were captured in a Shannon trap and after landing on human collectors and retrieved monthly. Nocturnal activity was estimated using a log-linear model. Peak sand fly collection in the Shannon trap occurred in summer and winter, and peak fly collection on humans occurred in spring and summer. Ny. intermedia was captured in both the hottest and coldest months, indicating its adaptability to different seasons and the possibility of disease transmission at any time of the year in Campus Fiocruz Mata Atlântica, Brazil.
Highlights
Nyssomyia intermedia is an important vector of American cutaneous leishmaniasis
The nocturnal activity of Ny. intermedia was estimated using two years of seasonal observation data collected from the Shannon trapping
In a Shannon trap study conducted in the municipality of Itupeva, in the southeast region of the state of São Paulo, Mayo et al found that Ny. intermedia s. l. was at its highest density in the coldest and driest period of the year (April–September), with the highest activity between the second and fifth hour after twilight, reaching a peak in the third hour, at approximately 08.00 pm[13]
Summary
Nyssomyia intermedia is an important vector of American cutaneous leishmaniasis. Methods: Sand flies were captured in a Shannon trap and after landing on human collectors and retrieved monthly. All sand fly captures were authorized by Mrs Maria Jovelina Ferreira de Freitas, owner of the study site in the community of Caminho da Cachoeira Community in CFMA. The expected number of sand flies per hour, λt, represents Ny. intermedia nocturnal activity where t = 0 is 06.00 pm; t = 1 represents is the time period from 06.00–07.00 pm; and t = 2 is 07.00–08.00 pm, and so on.
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