Abstract
Simple SummaryAnalyzing the biological and ecological characteristics of arthropods constitutes the basis for the entomological surveillance of vector-borne diseases. This is accomplished in order to implement vector surveillance and control programs. Thus, with the objective to update the distribution of sandflies in the main transmission region of cutaneous leishmaniasis in the state of São Paulo, we carried out a study of fauna in a modified environment, considering its environmental characteristics and climatic variables. Ecological indices such as richness, abundance, diversity, and equitability of the sandfly fauna in the region are presented.Some ecological parameters and the distribution of vectors in the municipality of Eldorado, Vale do Ribeira Region, São Paulo, were studied. Entomological surveys were carried out from September 2019 to March 2021. It was observed that a few ecological parameters, including richness, abundance, diversity, and equitability, were typical of a modified environment, where artificial ecotopes maintain the presence of sandflies throughout the year. A total of 11,668 sandflies were captured. The presence of five taxa were observed in Eldorado, with low diversity and high dominance of Nyssomyia intermedia next to Ny. neivai, which are sympatric species. The results presented reinforce the importance of these species in anthropized areas in the transmission of cutaneous leishmaniasis (CL) agents and the need for entomological monitoring. Psathyromyia pascalei was encountered for the first time in the municipality, expanding the known area of distribution of this species in a modified environment.
Highlights
Cutaneous leishmaniasis (CL) is an infectious non-contagious chronic disease caused by several species of parasites in the genus Leishmania (Kinetoplastida, Trypanosomatidae)
The clinical forms have different characteristics according to the infecting species, such as: cutaneous leishmaniasis (L. guyanensis), mucosal cutaneous leishmaniasis (L. braziliensis), diffuse cutaneous leishmaniasis (L. amazonensis), and disseminated leishmaniasis (L. braziliensis) [1]
The species that have been identified as vectors of CL of the main etiological agent in the state of São Paulo (SSP), Leishmania braziliensis, are Nyssomyia intermedia (Lutz and Neiva), Nyssomyia whitmani (Antunes and Coutinho), Nyssomyia neivai (Pinto), Migonemyia migonei (França), Pintomyia pessoai (Coutinho and Barretto), and Pintomyia fischeri (Pinto) [2]
Summary
Cutaneous leishmaniasis (CL) is an infectious non-contagious chronic disease caused by several species of parasites in the genus Leishmania (Kinetoplastida, Trypanosomatidae). The clinical forms have different characteristics according to the infecting species, such as: cutaneous leishmaniasis (L. guyanensis), mucosal cutaneous leishmaniasis (L. braziliensis), diffuse cutaneous leishmaniasis (L. amazonensis), and disseminated leishmaniasis (L. braziliensis) [1]. The transmission of these parasites depends on the species of sandfly-vectors found in an area and distribution of the reservoir [1]. Sandflies are Diptera (Diptera, Psychodidae, Phlebotominae) whose females are hematophagous. Their average period of adulthood is 20 days, which is sufficient time for successful transmission of the protozoan. The species that have been identified as vectors of CL of the main etiological agent in the state of São Paulo (SSP), Leishmania braziliensis, are Nyssomyia intermedia (Lutz and Neiva), Nyssomyia whitmani (Antunes and Coutinho), Nyssomyia neivai (Pinto), Migonemyia migonei (França), Pintomyia pessoai (Coutinho and Barretto), and Pintomyia fischeri (Pinto) [2]
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