Epizootic Infection by Trypanosoma vivax in Cattle from the State of Minas Gerais, Brazil
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Trypanosomiasis is caused by a pathogenic protozoan of the genus Trypanosoma, being Trypanosoma vivax the most important agent for cattle. The aim of the present study was to demonstrate the expansion of T. vivax infection in different mesoregions of Minas Gerais, Brazil, and describe the clinicopathological findings of trypanosomiasis in cattle. The diagnosis was based on visualization of the parasite in blood smears and DNA detection of T. vivax in the blood of live cows and tissues of necropsied animals by the polymerase chain reaction (PCR). Thirty suspected herds were tested, of which 11 were positive for T. vivax. The most frequent clinical signs were anemia, apathy, drop in milk production, weight loss, reproductive disorders, and nervous signs. Concomitant diseases, such as malignant edema, pneumonia and increased cases of mastitis were associated with T. vivax infection. Three cows were necropsied and the most significant findings were low body condition score, pale mucous and spleen with white pulp hyperplasia. The results demonstrated the expansion of T. vivax infection in Minas Gerais, that PCR-associated blood smears are promising for diagnosis, and that other diseases often occur concomitantly to T. vivax infection in regions with trypanosomiasis in cattle.
Abstract
Trypanosomiasis is caused by a pathogenic protozoan of the genus Trypanosoma, being Trypanosoma vivax the most important agent for cattle. The aim of the present study was to demonstrate the expansion of T. vivax infection in different mesoregions of Minas Gerais, Brazil, and describe the clinicopathological findings of trypanosomiasis in cattle. The diagnosis was based on visualization of the parasite in blood smears and DNA detection of T. vivax in the blood of live cows and tissues of necropsied animals by the polymerase chain reaction (PCR). Thirty suspected herds were tested, of which 11 were positive for T. vivax. The most frequent clinical signs were anemia, apathy, drop in milk production, weight loss, reproductive disorders, and nervous signs. Concomitant diseases, such as malignant edema, pneumonia and increased cases of mastitis were associated with T. vivax infection. Three cows were necropsied and the most significant findings were low body condition score, pale mucous and spleen with white pulp hyperplasia. The results demonstrated the expansion of T. vivax infection in Minas Gerais, that PCR-associated blood smears are promising for diagnosis, and that other diseases often occur concomitantly to T. vivax infection in regions with trypanosomiasis in cattle.
참고문헌 (18)
- Batista JS, "Trypanosomiasis by Trypanosoma vivax in cattle in the Brazilian semiarid : description of an outbreak and lesions in the nervous system", Vet Parasitol, 143, pp.174~181 (2007)
- Batista JS, "Aspectos clínicos, epidemiológicos e patológicos da infecção natural em bovinos por Trypanosoma vivax na Paraíba", Pesq Vet Bras, 28, pp.63~69 (2008)[DOI]
- Cadioli FA, "First report of Trypanosoma vivax outbreak in dairy cattle in São Paulo State, Brazil", Rev Bras Parasitol Vet, 21, pp.118~124 (2012)
- Carvalho AU, "Ocorrência de Trypanosoma vivax no estado de Minas Gerais", Arq Bras Med Vet Zootec, 60, pp.769~771 (2008)[DOI]
- Cortez AP, "Cathepsin L-like genes of Trypanosoma vivax from Africa and South America--characterization, relationships and diagnostic implications", Mol Cell Probes, 23, pp.44~51 (2009)
- Gardiner PR, "Haemorrhagic lesions resulting from Trypanosoma vivax infection in Ayshire cattle", Vet Parasitol, 31, pp.187~197 (1989)
- Linhares GFC, "Tripanossomíase em bovinos no município de Formoso do Araguaia, Tocantins : relato de caso", Ci Anim Bras, 7, pp.455~460 (2006)[DOI]
- Melo SA, "Bovine trypanosomiasis an emerging disease in Maranhão State-Brazil", Vector Borne Zoonotic Dis, 11, pp.853~856 (2011)
- Meléndez RD, "Perinatal infection with Trypanosoma vivax in calf in Venezuela", J Parasitol, 79, pp.293~294 (1993)
- Paiva F, "Ocorrência de Trypanosoma vivax em bovinos no estado do Mato Grosso do Sul", Rev Bras Parasitol Vet, 6, pp.349~ (1997)[DOI]
- Sanger F, "DNA sequencing with chain-terminating inhibitors", Proc Natl Acad Sci USA, 74, pp.5463~5467 (1977)
- Shaw JJ, "Trypanosoma vivax in Brazil", Ann Trop Med Parasitol, 66, pp.25~32 (1972)
- Serra-Freire NM, "Oiapoque-outro foco de Trypanosoma vivax no Brasil", Rev Bras Med Vet, 4, pp.30~31 (1981)[DOI]
- Silva RA, "Outbreak of trypanosomiasis due to Trypanosoma vivax(Ziemann, 1905)in bovine of Pantanal, Brazil", Mem Inst Oswaldo Cruz, 91, pp.561~562 (1996)
- Silva ASD, "Primeiro registro de Trypanosoma vivax em bovinos no Estado do Rio Grande do Sul, Brasil", Cienc Rural, 39, pp.2550~2554 (2009)[DOI]
- Silva TM, "Pathogenesis of reproductive failure induced by Trypanosoma vivax in experimentally infected pregnant ewes", Vet Res, 44, pp.1~ (2013)
- Soulsby EJL, "Helminths, Arthropods and Protozoa of Domesticated Animals", pp.809~ (1982), Bailliére Tindall
- Valli VEO, "Palmer’s Pathology of Domestic Animals", pp.103~268 (2016), Saunders Elsevier