Luís Fábio da Silva Batista1,2, Vânia Lúcia Ribeiro da Matta1, Thaise Yumie Tomokane1, Acácio Duarte Pacheco3, Fernando Tobias Silveira4,5, Claudio Nazaretian Rossi6, Mary Marcondes3, Márcia Dalastra Laurenti1. 1. Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, São Paulo, Brasil. 2. Departamento de Patologia, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, São Paulo, Brasil. 3. Departamento de Clínica, Cirurgia e Reprodução Animal, Faculdade de Medicina Veterinária, Universidade Estadual de São Paulo, Araçatuba, São Paulo, Brasil. 4. Instituto Evandro Chagas, Ministério da Saúde, Ananindeua, Pará, Brasil. 5. Núcleo de Medicina Tropical, Universidade Federal do Pará, Belém, Pará, Brasil. 6. Instituto de Ciências da Saúde, Universidade Paulista, Campinas, São Paulo, Brasil.
Abstract
INTRODUCTION: Canine exposure to Lutzomyia longipalpis bites and the potential of Leishmania infantum transmissibility for the vector were evaluated. METHODS: Immunoglobulin G (IgG) anti-Lu longipalpis saliva and -L. infantum, and blood parasite load were determined in dogs from endemic areas of visceral leishmaniasis. RESULTS: Blood parasitism was similar between symptomatic and asymptomatic dogs. IgG anti-L. infantum was higher in symptomatic dogs, but IgG anti-Lu. longipalpis saliva was mostly observed in higher titers in asymptomatic dogs, indicating vector preference for feeding on asymptomatic dogs. CONCLUSIONS: Our data suggest a pivotal role of asymptomatic dogs in L. infantum transmission in endemic areas.
INTRODUCTION:Canine exposure to Lutzomyia longipalpis bites and the potential of Leishmania infantum transmissibility for the vector were evaluated. METHODS: Immunoglobulin G (IgG) anti-Lu longipalpis saliva and -L. infantum, and blood parasite load were determined in dogs from endemic areas of visceral leishmaniasis. RESULTS: Blood parasitism was similar between symptomatic and asymptomatic dogs. IgG anti-L. infantum was higher in symptomatic dogs, but IgG anti-Lu. longipalpis saliva was mostly observed in higher titers in asymptomatic dogs, indicating vector preference for feeding on asymptomatic dogs. CONCLUSIONS: Our data suggest a pivotal role of asymptomatic dogs in L. infantum transmission in endemic areas.
Authors: Luís F S Batista; Yuri T Utsunomiya; Thaís B F Silva; Mariana M Carneiro; Joyr S F Paiva; Rafaela B Silva; Thaíse Y Tomokane; Claudio N Rossi; Acácio D Pacheco; Rafaela B P Torrecilha; Fernando T Silveira; Mary Marcondes; Cáris M Nunes; Márcia D Laurenti Journal: PLoS One Date: 2018-05-09 Impact factor: 3.240