Levantamento da prevalência da babesiose bovina no município de Umuarama, Paraná, Brasil / Assessment of bovine babesiosis, prevalence in the municipality of Umuarama, Paraná, Brazil / Levantamiento de prevalencia de babesiosis bovina en el município de Umuarama, Paraná, Brasil

A babesiose bovina é uma hemoparasitose causada por duas espécies de protozoários, Babesia bovis e Babesia bigemina, que atinge os rebanhos de bovinos em praticamente todo território nacional, sendo responsável por grandes perdas na produtividade dos rebanhos. A transmissão ocorre, principalmente, pelo carrapato Rhipicephalus Boophillus microplus. Os sinais clínicos se caracterizam por anemia intensa, por hemólise extravascular, febre, hemoglobinúria, icterícia e morte. O diagnóstico da babesiose pode ser por meio do exame microscópico de esfregaços de sangue periférico. O objetivo desse trabalho foi estudar a prevalência da babesiose bovina no município de Umuarama. Foram analisados 325 prontuários clí-nicos de bovinos provenientes do município de Umuarama atendidos no Hospital Veterinário da Universidade Paranaense no período de janeiro de 2003 a dezembro de 2010. A análise revelou que 32,4% foram positivos e 68,6% foram negativos para Babesia spp. Em relação ao sexo dos animais, 30,5% das fêmeas (n=243) e 34,1% dos machos (n=82) foram positivos. Segundo a aptidão zootecnica 27,4% dos bovinos com aptidão para corte (n=164) e 35,4% dos bovinos com aptidão para leite (n=161) foram positivos. Não houve diferença significativa entre os sexos e entre as aptidões (p>0,05). Segundo a subespécie bovina, 23% dos bovinos Bos taurus indicus (n=107) e 37,4% dos bovinos Bos taurus taurus (n=179) foram positivos. Houve diferença significativa entre as subespécies (p<0,05), ocorrendo maior prevalência de babesiose nos Bos taurus taurus. De acordo com os resultados encontrados pode-se concluir que nao houve diferença na prevalência de babesiose quando se comparou o sexo e a aptidão zootécnica. Foi observada uma maior prevalÇencia de babesiose em Bos taurus quando comparado com Bos indicus.

Bovine babesiois is a hemoparasitosis, this disease is caused by two protozoa species, Babesia bovis and Babesiabigemina, and afflicts bovine herds on the entire country, being, responsible for great losses in productivity of the herds.Transmission happens mainly by the tick Rhipicephalus Boophilus microplus. Clinical signs are intense anemia by extravascularhemolysis, fever, hemoglobinuria, jaundice and death. The diagnosis for babesiosis may be through microscopic examinationof peripheral blood smears. It is a disease of great importance for bovine production. The aim of this paper was to studythe prevalence of babesiosis in the municipality of Umuarama. It was analyzed 325 clinical charts from Umuarama, treatedat the Universidade Paranaense (UNIPAR) Veterinary Hospital, from January 2003 to December 2010. The analysis showedthat 32.4% were positive and 68.6% were negative for Babesia spp. Considering gender, 30.5% of the female (n=243) and34.1% of male (n=82) were positive. Concerning productive aptitude 27.4% of the bovines with beef aptitude (n=164) and35.4% of bovines with dairy aptitude (n=161) were positive. There was no significant difference between genders and aptitude(p>0.05). Concerning bovine subspecies 23% of Bos taurus indicus (n=107) and 37.4% of Bos taurus taurus (n=179) werepositive. There was significant difference between subspecies (p<0,05), with greater prevalence of babesiosis in Bos taurustaurus.. According to the results found, it is possible to conclude that there was no difference in the prevalence of babesiosiswhen compared gender and productive aptitude. It was observed a higher prevalence of babesiosis in Bos taurus taurus whencompared to Bos indicus.

Histopathology of lymph nodes of babesia infected cattles with estimation of adenosine deaminose activity in blood cells and serum

The present work was carried out on cattles infected with Babesia bigemina. Blood examination showed various forms of the parasite intraerythrocytes. The histopathological study of the lymph nodes revealed follicular hyperplasia and marked dilatation and congestion of the medullary blood sinusoids with parasitized and non-parasitized RBCs. The activity of adenosine deaminase [ADA] was determined in erythrocytes, leukocytes and serum of infected cattles with acute babesiosis. ADA activity was significantly increased in both erythrocytes and serum, while leukocyte ADA activity showed a significant decrease indicating suppression of cell-mediated immunity