Occurrences of Oestrus ovis parasitism in necropsied sheep in the Umuarama microregion, Paraná, Brazil
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Data
2015-09
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Resumo
Between January 2007 and September 2013, 71 sheep belonging to 12 farms in the Umuarama microregion, State of
Paraná, were evaluated regarding presence of Oestrus ovis larvae, during necropsies. The farms from which these animals
originated were visited and the owners and employees were interviewed. Occurrences of O. ovis parasitism in sheep were
diagnosed for the first time on this microregion. Of the 71 animals, 12 (16.9%) were parasitized by O. ovis, with mean
intensity of 2.25 larvae per infested head (1 to 8 larvae/infested head). There was a high correlation (0.81, p=0.0346)
between the number of larvae and the macroscopic lesions observed in these animals’ nasal cavities, such that sheep with
more than 3 larvae may contain mucupurulent secretions or epistaxis. From the interviews conducted, it was found
that all the farm owners were applying chemical parasite control methods (helminths and/or O. ovis), administered
to all animals in the herds every 30 days (91.6% of the producers), using derivatives of macrocyclic lactones and/or
benzimidazoles/imidazothiazoles. Further studies need to be conducted in this particular region, in an attempt to elucidate
the prevalence of O. ovis parasitism in herds.
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Miíase cavitária, Oestrus ovis, Ovinos, Cavitary myiasis, Sheep
Citação
CARVALHO, Rafael Silveira; RUIVO, Maycon Araújo; COLLI, Marcos Henrique Alcantara; PEREIRA, Valdomiro; MARTINEZ, Antônio Campanha; MAZZUCATTO, Barbara Cristina; CRUZ, Breno Cayeiro; MACIEL, Willian Giquelin; FELIPPELLI, Gustavo; TEIXEIRA, Weslen Fabricio Pires; SOARES, Vando Edésio; COSTA, Alvimar José da; LOPES, Welber Daniel Zanetti. Occurrences of Oestrus ovis parasitism in necropsied sheep in the Umuarama microregion, Paraná, Brazil. Revista Brasileira de Parasitologia Veterinária, Jaboticabal, v. 24, n. 3, p. 370-374, July/Sept. 2015.