Economic evaluation and efficacy of strategic-selective treatment of gastrointestinal parasites in dairy calves

Autor: Yuly Andrea Caicedo Blanco, Jonata de Melo Barbieri, Renato Ribeiro de Lima, Marcos Aurélio Lopes, Eduardo Mitke Brandão Reis, Christiane Maria Barcellos Magalhães da Rocha, Adriana de Souza Coutinho, Antônio Marcos Guimarães
Jazyk: English<br />Spanish; Castilian<br />Portuguese
Předmět:
Zdroj: Revista Brasileira de Parasitologia Veterinária, Vol 26, Iss 2, Pp 123-128
Druh dokumentu: article
ISSN: 1984-2961
DOI: 10.1590/s1984-29612017020
Popis: Abstract In the Experimental Farm of the Universidade Federal de Lavras (EF-UFLA), state of Minas Gerais, Brazil, on their day of birth, female Holstein calves were randomly selected and placed into two groups containing fifteen animals each: Strategic-Selective Treatment (S-ST) or Conventional Treatment (CT). In the S-ST, calves were treated after coproparasitological examinations according to criteria established previously by the researchers. Calves in the CT were treated according to the opinion of the veterinarian of EF-UFLA. For statistical analysis, the frequency (%) of fecal samples with count of eggs per gram of feces (EPG) ≥300, count of oocysts per gram of feces (OoPG) ≥500 and fecal samples with count of cysts of Giardia spp. ≥1 were conducted. The overall average frequency of fecal samples with EPG ≥300, OoPG ≥500 and Giardia spp. cysts ≥1, respectively, was similar (p >0.05) between S-ST (20.3%; 17.3%; and 31.5%) and CT (26.4%; 23.9%; and 37.3%). The effective operational cost, per animal, in 12 months, was of R$ 784.58 (US$ 241.41) and R$ 83.90 (US$ 25.81) in S-ST and CT, respectively. The S-ST requires adjustments to be used as a technically efficient and economically viable alternative for the control of gastrointestinal parasitosis in female Holstein calves.
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