Gastrointestinal and pulmonary nematodes in calves naturally infected in the cities of Botucatu and Manduri, in the Brazilian state of São Paulo

Autor: Marcela C. Cezaro, José H. Neves, José R.L.M. Cury, Felipe M. Dalanezi, Raphaela M. Oliveira, João C.P. Ferreira, Vitoldo A.K. Neto, Elizabeth M.S. Schmidt
Jazyk: English<br />Portuguese
Předmět:
Zdroj: Pesquisa Veterinária Brasileira, Vol 38, Iss 7, Pp 1286-1292
Druh dokumentu: article
ISSN: 1678-5150
DOI: 10.1590/1678-5150-pvb-5225
Popis: ABSTRACT: This study aimed to determine the occurrence of gastrointestinal and pulmonary parasites in calves and to evaluate seasonal and age patterns in parasitism. For this, we used 140 clinically healthy crossbreed calves (two to 12 months old) that belonged to two private farms in the municipalities of Botucatu (n=53) and Manduri (n=87), São Paulo state, Brazil. The calves were monitored for 12 months (from September 2014 to August 2015). Fecal samples were collected directly from the rectum every three months. Fecal egg counts were determined using the modified McMaster technique with a sensitivity of 50 eggs per gram of feces (EPG). Coproculture was performed on pooled samples to identify Strongylida infective larvae. First-stage larvae of Dictyocaulus viviparus were extracted by a modified Baermann method. The data showed non-normal distribution (Shapiro-Wilk) and the nonparametric Kruskall-Wallis test was employed to evaluate the EPG data by seasons and age groups. Dunn’s post-test was used for multiple comparisons (P
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