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Comparative study of African and South American trypanosomes of ungulates: molecular diversity, diagnosis, phylogeny and epidemiology

Grant number: 16/03028-1
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): June 01, 2016
Effective date (End): May 31, 2019
Field of knowledge:Biological Sciences - Parasitology
Principal Investigator:Marta Maria Geraldes Teixeira
Grantee:Herakles Antonio Garcia Perez
Home Institution: Instituto de Ciências Biomédicas (ICB). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

African Animal Trypanosomiasis causes severe negative economic impact in livestock productivity in Africa, and recently also in Brazil and other South American countries. Trypanosoma vivax, T. congolense, T. b. brucei, T. simiae, T. godfreyi, T. suis, T. evansi and T. equiperdum are all pathogenic species of African origin that affect ungulates, mostly enzootias of wild ungulates transmitted by tsetse flies. T. vivax, T. evansi and T. equiperdum are the only African trypanosomes found outside Africa, introduced into America with livestock brought by European settlers and mechanically transmitted, mostly by biting flies. T. theileri and allied species infect domestic and wild ruminants worldwide inducing chronic and asymptomatic infections. New molecular approaches have shown a remarkable genetic diversity within Trypanosoma, including of non-pathogenic and pathogenic species, and trypanosomes that represent a potential risk to animal production. Analyses of genetic diversity and phylogenetic relationships among trypanosomes of diverse hosts and vectors from distant regions are essential to the understanding of parasites-vertebrates-vectors associations, transmission cycles, tracking of outbreak sources, and to examine potential links between genotypes, hosts and disease. Cooperative studies with several researchers from Brazil, other South American countries and Africa have allowed us to obtain a large trypanosome collection from wild and domestic ungulates and their vectors, as well as a large set of DNA sequences from several genes and entire genomes. The main goal of this project is to expand the knowledge on genetic diversity, phylogeny and eco-phylogeographical patterns of ungulate trypanosomes. Data from this study will be valuable to understand the evolutionary history; to infer hypothesis regarding the origin, adaptation and expansion of genotypes introduced into South America; to assess links between species/genotypes and hosts, geographical origin, pathogenicity and virulence; and to identify new targets for diagnosis, genotyping, vaccines and drugs. (AU)

Matéria(s) publicada(s) na Agência FAPESP sobre a bolsa:
Region in which <i>Trypanosoma vivax</i> originated is identified 

Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
RODRIGUES, CARLA M. F.; GARCIA, HERAKLES A.; SHEFERAW, DESIE; RODRIGUES, ADRIANA C.; PEREIRA, CARLOS L.; CAMARGO, ERNEY P.; TEIXEIRA, MARTA M. G. Genetic diversity of trypanosomes pathogenic to livestock in tsetse flies from the Nech Sar National Park in Ethiopia: A concern for tsetse suppressed area in Southern Rift Valley?. INFECTION GENETICS AND EVOLUTION, v. 69, p. 38-47, APR 2019. Web of Science Citations: 0.
GARCIA, HERAKLES A.; RODRIGUES, CARLA M. F.; RODRIGUES, ADRIANA C.; PEREIRA, DAGMAR L.; PEREIRA, CARLOS L.; CAMARGO, ERNEY P.; HAMILTON, P. B.; TEIXEIRA, MARTA M. G. Remarkable richness of trypanosomes in tsetse flies (Glossina morsitans morsitans and Glossina pallidipes) from the Gorongosa National Park and Niassa National Reserve of Mozambique revealed by fluorescent fragment length barcoding (FFLB). INFECTION GENETICS AND EVOLUTION, v. 63, p. 370-379, SEP 2018. Web of Science Citations: 6.
ORTIZ, PAOLA A.; GARCIA, HERAKLES A.; LIMA, LUCIANA; DA SILVA, FLAVIA MAIA; CAMPANER, MARTA; PEREIRA, CARLOS L.; JITTAPALAPONG, SATHAPORN; NEVES, LUIS; DESQUESNES, MARC; CAMARGO, ERNEY P.; TEIXEIRA, MARTA M. G. Diagnosis and genetic analysis of the worldwide distributed Rattus-borne Trypanosoma (Herpetosoma) lewisi and its allied species in blood and fleas of rodents. INFECTION GENETICS AND EVOLUTION, v. 63, p. 380-390, SEP 2018. Web of Science Citations: 4.
RODRIGUES, CARLA M. F.; GARCIA, HERAKLES A.; RODRIGUES, ADRIANA C.; COSTA-MARTINS, ANDRE G.; PEREIRA, CARLOS L.; PEREIRA, DAGMAR L.; BENGALY, ZAKARIA; NEVES, LUIS; CAMARGO, ERNEY P.; HAMILTON, PATRICK B.; TEIXEIRA, MARTA M. G. New insights from Gorongosa National Park and Niassa National Reserve of Mozambique increasing the genetic diversity of Trypanosoma vivax and Trypanosoma vivax-like in tsetse flies, wild ungulates and livestock from East Africa. PARASITES & VECTORS, v. 10, JUL 17 2017. Web of Science Citations: 5.
GARCIA, HERAKLES A.; RAMIREZ, ONEYDA J.; RODRIGUES, CARLA M. F.; SANCHEZ, RAFAEL G.; BETHENCOURT, ANGELICA M.; PEREZ, GABRIELA DEL M.; MINERVINO, ANTONIO H. H.; RODRIGUES, ADRIANA C.; TEIXEIRA, MARTA M. G. Trypanosoma vivax in water buffalo of the Venezuelan Llanos: An unusual outbreak of wasting disease in an endemic area of typically asymptomatic infections. Veterinary Parasitology, v. 230, p. 49-55, OCT 30 2016. Web of Science Citations: 3.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.