Diversity of parasites of the genus Leishmania and Trypanosoma in a wildlife conservation area and pets from their surroundings in Espírito Santo

Author(s)

Igor da Cunha Lima Acosta

• Document type: Master's Dissertation
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Faculdade de Medicina Veterinária e Zootecnia (FMVZ/SBD)
• Defense date: 2013-11-19

Examining board members

Arlei Marcili; Rodrigo Martins Soares; Marcia Aparecida Sperança

• Advisor: Arlei Marcili

Abstract

The species of the genus Trypanosoma parasites of all vertebrate classes (fish, amphibians, reptiles, birds and mammals) and the genus Leishmania parasites mammals in the New World and have life cycles with alternating between vertebrates and invertebrates. Most species develops in arthropod vectors, which may belong to different orders and families. Trypanosomes circulating in sylvatic enzootic diseases as associated with the hosts and their ecotopes. Most species are not pathogenic, Visceral Leishmaniasis is an important zoonosis and has wild and domestic canids as important reservoirs known. Studies in some species of trypanosomes show a great complexity of the sylvatic cycle in biomes, including the Atlantic and genetic diversity of L. (L.) infantum chagasi in Brazil is not known. We emphasize the fact that there are few studies in the State of Espírito Santo. So far, have not been evaluated small terrestrial mammals, large mammals (Tapirus terrestris) and wild bats as reservoirs of these parasites in this state. This study\'s main objective, knowledge of the diversity of parasites of the genus Leishmania and Trypanosoma in wild Biological Reserve Stream Deer and domestic of your surroundings in the Pinheiros city in the state of Espírito Santo through isolation, characterization and molecular studies with traditional phylogenetic markers used for the group. There were two campaigns capture in June and November 2012 totaling an effort of 28,800 trap / day for small terrestrial mammals and h.m2 12600 with a total of 157 individuals belonging to five distinct orders, 23 genera and 27 species. Of the total of 18 animals captured (11:46%) had positive blood cultures and 11 (7.1%) cultures were established and cryopreserved with morphology the parasites of the genus Trypanosoma. Isolates were identified and positioned through V7V8 region sequences of SSU rDNA and one isolate of T. cruzi marinkellei and eight T. dionisii hosts were detected in bats and two isolates showed a distinct morphology Tapirus terrestris those already described for the genus Trypanosoma and partial characterization by 18S rDNA gene gGAPDH complete and point to a new species of this genus and these are the first isolates from these hosts. In domestic animals, dogs were obtained culture of popliteal lymph node of both hind legs and all animals were negative. Furthermore, serological analysis was also negative for all dogs sampled in the vicinity of the Biological Reserve of Deer Creek. (AU)

• FAPESP's process: 11/15311-6 - Diversity of parasites of the genus Leishmania and Trypanosoma in wild mammals of one conservation units and domestic animals from their surroundings in the State of Espírito Santo.
• Grantee: Igor da Cunha Lima Acosta
• Support Opportunities: Scholarships in Brazil - Master