Parasitology Research

, Volume 110, Issue 1, pp 73–80 | Cite as

Highly debilitating natural Trypanosoma vivax infections in Brazilian calves: epidemiology, pathology, and probable transplacental transmission

  • Jael S. BatistaEmail author
  • Carla M. F. Rodrigues
  • Roberio G. Olinda
  • Taciana M. F. Silva
  • Rodolfo G. Vale
  • Antônio C. L. Câmara
  • Rachiel E. S. Rebouças
  • Francisco Silvestre B. Bezerra
  • Herakles A. García
  • Marta M. G. Teixeira
Original Paper


Clinical, epidemiological, and pathological aspects of trypanosomiasis caused by Trypanosoma vivax in calves were reported for the first time in northeast Brazil. Clinical and epidemiological data, packed cell volumes (PCV), and parasitemia were assessed in 150 calves in May 2009 (rainy season—survey 1) and in 153 calves in November 2009 (dry season—survey 2) in three farms (A, B, and C). Prevalence of T. vivax in calves examined in the survey 1 was 63.3%, 65.0%, and 80.0% in farms A, B, and C, respectively. Morbidity varied from 63.3% to 80%, mortality from 15% to 30% and lethality from 23% to 37.5%. In survey 1, for all farms, high parasitemia (from 30.3 to 26.2 × 106 parasites/mL), fever (from 39.8 to 40.3°C), low PCV (from 15.7% to 18.1%), and body score (from 2.5 to 3.5) were detected. Calves showed depression, weight loss, pale mucous membranes, enlarged lymph nodes, edema of the dewlap, cough, coryza, and diarrhea. The animals from farms A and B were treated with diminazene aceturate. Six months after, in survey 2, non-treated calves from farm C showed values for prevalence (81.82), morbidity (81.82), mortality (12.73), and lethality (15.55) similar to those in survey 1 (P > 0.05). Also in survey 2, four calves aging merely 1–3 days old presented high parasitemia levels (from 32 × 106 to 74 × 106 parasites/mL), suggesting transplacental transmission. In conclusion, trypanosomiasis by T. vivax constitutes high prevalent disease for calves raised in Brazilian semiarid and may have transplacental transmission.


Pack Cell Volume Vivax Infection Trypanosomiasis High Parasitemia Pale Mucous Membrane 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Jael S. Batista
    • 1
    Email author
  • Carla M. F. Rodrigues
    • 1
  • Roberio G. Olinda
    • 1
  • Taciana M. F. Silva
    • 1
  • Rodolfo G. Vale
    • 1
  • Antônio C. L. Câmara
    • 1
  • Rachiel E. S. Rebouças
    • 1
  • Francisco Silvestre B. Bezerra
    • 1
  • Herakles A. García
    • 2
  • Marta M. G. Teixeira
    • 2
  1. 1.Department of Animal SciencesFederal Rural University of the Semiarid (UFERSA)MossoróBrazil
  2. 2.Department of Parasitology, Institute of Biological SciencesUniversity of São Paulo (USP)São PauloBrazil

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