Infection by Trypanosoma vivax in goats and sheep in the Brazilian semiarid region: From acute disease outbreak to chronic cryptic infection

Batista, Jael Soares; Oliveira, Ana F.; Rodrigues, Carla Monadeli Filgueira; Damasceno, Charliana Aragão; Oliveira, Isabelle Rayanne Sousa de; Alves, Heron M.; Paiva, Erika Souza; Brito, Parmênedes Dias de; Medeiros, José Maria Freire de; Rodrigues, Ana Carolina; Teixeira, Marta Maria Geraldes

doi:10.1016/j.vetpar.2009.07.005

Cited by 46 publications

(55 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar observations about the rainy season and T. vivax outbreaks were made by Batista et al (2009) in the Northeastern region of Brazil, and by Cuclovici et al (2010) in Minas Gerais, on dairy farms. In contrast with previous outbreaks described in Brazil, the mean rainfall values for the region of the outbreak reported here were below normal for June to December 2008, with no rainy days between June and October and a mean temperature of 23.6 °C (CIIAGRO, 2011).…”

Section: Outbreak Characterization and Clinical Signssupporting

confidence: 81%

“…The main clinical signs observed in cattle naturally infected with T. vivax have been intermittent fever, anemia, abortion, apathy, inappetence, diminished milk production, progressive weight loss and, occasionally, death (SILVA et al, 1996(SILVA et al, , 1998aBATISTA et al, 2007BATISTA et al, , 2009OSÓRIO et al, 2008). However, infected cattle may sometimes be asymptomatic (GARDINER, 1989;PAIVA et al, 2000;QUISPE et al, 2003;DÁVILA et al, 2003;BATISTA et al, 2007BATISTA et al, , 2009.…”

Section: Introductionmentioning

confidence: 99%

“…However, infected cattle may sometimes be asymptomatic (GARDINER, 1989;PAIVA et al, 2000;QUISPE et al, 2003;DÁVILA et al, 2003;BATISTA et al, 2007BATISTA et al, , 2009. If no treatment were made, the estimated financial impact of bovine trypanosomiasis due to T. vivax occurring in the Brazilian Pantanal region (states of Mato Grosso and Mato Grosso do Sul) would be 17% of the total herd value (SEIDL et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

First report of Trypanosoma vivax outbreak in dairy cattle in São Paulo state, Brazil

Cadioli

Barnabé²,

Machado

et al. 2012

Rev. Bras. Parasitol. Vet.

View full text Add to dashboard Cite

This is the first description of a Trypanosoma vivax outbreak in the state of São Paulo (municipality of Lins). Fever, jaundice, decreased milk production, weight loss, profuse diarrhea, abortion, anemia, leukocytosis and hyperfibrinogenemia were observed in the affected animals. Thirty-one cows and calves died out of a total of 1080 in the herd. Three cows showed neurological symptoms like dysmetria, ataxia, muscle weakness, ptyalism, lymph node enlargement and submandibular edema. Flagellated hemoparasites were observed in blood smears. The species was diagnosed as T. vivax by means of PCR. This T. vivax strain showed resistance to diaminazene aceturate and the infection spread quickly at the herd. From the ELISA test, 599 serum samples (98.36%) were positive for anti-T. vivax IgG antibodies. This outbreak occurred during a very dry period, which indicates that other factors were involved in the outbreak, such as absence of tabanids and large populations of Haematobia irritans and Stomoxys calcitrans. The increases in these populations may have been due to the use of biosolid waste from sugar and ethanol plants in the sugarcane plantations surrounding the dairy farm.Keywords: Bovine, trypanosomiasis, natural infection, anemia, T. vivax, PCR. ResumoEsta é a primeira descrição de um surto de Trypanosoma vivax ocorrido no Estado de São Paulo, no município de Lins. Animais acometidos apresentaram febre, icterícia, diminuição da produção de leite, perda de peso, diarreia profusa, abortos, anemia, leucocitose e hiperfibrigenemia. Foram registrados 31 óbitos de vacas e bezerros em 1.080 bovinos no total. Três vacas apresentaram sintomatologia nervosa, como dismetria, ataxia e fraqueza muscular, além de ptialismo, aumento de linfonodos e edema submandibular. Hemoparasitas flagelados foram observados em esfregaços sanguíneos, e a espécie de tripanossomo foi diagnosticada como T. vivax por PCR. A cepa de T. vivax mostrou ser resistente ao tratamento com aceturato de diaminozeno e a infecção disseminou rapidamente no rebanho. Pelo ELISA, observou-se que 98,36% (599) das amostras de soro colhidas apresentaram títulos positivos para IgG anti-T. vivax. O surto ocorreu em condições de baixa precipitação pluviométrica, fato que indica que outros fatores estavam envolvidos na ocorrência desse surto, como a ausência de tabanídeos e a grande presença de Haematobia irritans e Stomoxys calcitrans, cujo aumento populacional pode ser devido ao uso de resíduos de usinas de açúcar e álcool nos canaviais que circundavam a granja leiteira.Palavras-chave: Bovino, tripanossomíase, infecção natural, anemia, T. vivax, PCR.

show abstract

Section: Outbreak Characterization and Clinical Signssupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

First report of Trypanosoma vivax outbreak in dairy cattle in São Paulo state, Brazil

Cadioli

Barnabé²,

Machado

et al. 2012

Rev. Bras. Parasitol. Vet.

View full text Add to dashboard Cite

show abstract

“…Embora em alguns países a cryptosporidiose seja considerada importante causa de diarreia neonatal em cordeiros, até a presente data não foi apontada como problema sanitário em ovinos criados no Brasil. Portanto, infecções por Cryptosporidium spp., embora frequentes, são aparentemente bem toleradas pelos ovinos (Green et al, 2004; (Batista et al, 2009). Posteriormente, outro surto foi registrado em uma propriedade da Paraíba, onde, dos 306 ovinos, 240 apresentaram sinais clínicos, e 216 morreram.…”

Section: Profilaxiaunclassified

“…Infecções por T. vivax, com baixa parasitemia e ausência de sinais clínicos, é disseminada entre bovinos, ovinos e búfalos. Em 83 ovinos examinados, T. vivax foi detectado em 32 (38,6%) animais por PCR, enquanto T. evansi não foi encontrado parasitando os ovinos (Davila et al, 2003). Em outro estudo realizado na mesma região, T. evansi também não foi detectado em ovinos.…”

Section: Profilaxiaunclassified

Os parasitas de ovinos

Amarante¹,

Ragozo²,

Silva³

2014

View full text Add to dashboard Cite

show abstract

Horses naturally infected by Trypanosoma vivax in southern Brazil

et al. 2010

View full text Add to dashboard Cite

In this study, we reported the first outbreak of the infection by Trypanosoma vivax in horses in southern Brazil, a non-endemic region where bovines have only recently been found infected by this trypanosome species. We evaluated 12 horses from a farm in southern Brazil, where four horses displayed pale mucous membranes, fever, weight loss, and swelling of abdomen, prepuce, or vulva. The diagnosis of T. vivax was confirmed in four horses by morphological parameters of trypomastigotes in blood smears and species-specific PCR. All T. vivax-infected animals showed anemia, and most showed increased levels of beta-1, beta-2, and gamma globulins. Horses were treated with diminazene aceturate, but cure was not achieved, and the disease relapsed after therapy. These findings demonstrated that Brazilian T. vivax isolates, which were already reported infecting cattle, buffaloes, goats, and sheep, can be highly pathogenic for horses, causing severe disease and even death of the animals due to the recurrence of the infection.

show abstract

Infection by Trypanosoma vivax in goats and sheep in the Brazilian semiarid region: From acute disease outbreak to chronic cryptic infection

Cited by 46 publications

References 30 publications

First report of Trypanosoma vivax outbreak in dairy cattle in São Paulo state, Brazil

First report of Trypanosoma vivax outbreak in dairy cattle in São Paulo state, Brazil

Os parasitas de ovinos

Horses naturally infected by Trypanosoma vivax in southern Brazil

Contact Info

Product

Resources

About