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Parasite. 2017;24:2. doi: 10.1051/parasite/2017002. Epub 2017 Jan 30.

Canine visceral leishmaniasis in the metropolitan area of São Paulo: Pintomyia fischeri as potential vector of Leishmania infantum.

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  • 1Postgraduate Program in Public Health, School of Public Health, University of São Paulo - USP, São Paulo, 01246-904 SP, Brazil.
  • 2Department of Pathology, Federal University of Mato Grosso do Sul-UFMS, Campo Grande, 79070-900 MS, Brazil.
  • 3Center of Control of Zoonosis of Bauru Municipality, 17032-340 SP, Brazil.
  • 4Institute of Tropical Medicine, University of São Paulo, São Paulo, 05403-000 SP, Brazil.
  • 5Department of Epidemiology, School of Public Health, University of São Paulo - USP, São Paulo, 01246-904 SP, Brazil.

Abstract

American visceral leishmaniasis is a zoonosis caused by Leishmania infantum and transmitted mainly by Lutzomyia longipalpis. However, canine cases have been reported in the absence of this species in the Greater São Paulo region, where Pintomyia fischeri and Migonemyia migonei are the predominant species. This raises the suspicion that they could be acting as vectors. Therefore, this study sought to investigate specific vector capacity parameters of these species and to compare them with those of Lu. longipalpis s.l. Among these parameters the blood feeding rate, the survival, and the susceptibility to the development of Le. infantum were evaluated for the three species, and the attractiveness of dogs to Pi. fischeri and Mg. migonei was evaluated. The estimated interval between blood meals was shorter for Lu. longipalpis s.l, followed by Pi. fischeri and Mg. migonei. The infection rate with Le. infantum flagellates in Lu. longipalpis was 9.8%, in Pi. fischeri 4.8%, and in Mg. migonei nil. The respective infective life expectancies (days) of Lu. longipalpis, Mg. migonei, and Pi. fischeri were 2.4, 1.94, and 1.68. Both Pi. fischeri and Mg. migonei were captured in the kennel with a predominance (95%) of Pi. fischeri. Considering the great attractiveness of dogs to Pi. fischeri, its susceptibility to infection by Le. infantum, infective life expectancies, and predominance in Greater São Paulo, this study presents evidence of Pi. fischeri as a potential vector of this parasite in the region.

PMID:
28134092
DOI:
10.1051/parasite/2017002
[PubMed - in process]
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