Occurrences of Oestrus ovis parasitism in necropsied sheep in the Umuarama microregion, Paraná, Brazil.
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.
Universidade Estadual de Maringá, Umuarama, PR, BR.
Rafael Silveira
RS
Carvalho
Universidade Estadual de Maringá, Umuarama, PR, BR.
Maycon Araújo
MA
Ruivo
Universidade Estadual de Maringá, Umuarama, PR, BR.
Marcos Henrique Alcantara
MH
Colli
Universidade Estadual de Maringá, Umuarama, PR, BR.
Valdomiro
V
Pereira
Universidade Estadual de Maringá, Umuarama, PR, BR.
Antônio Campanha
AC
Martinez
Universidade Estadual de Maringá, Umuarama, PR, BR.
Barbara Cristina
BC
Mazzucatto
Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, BR.
Breno Cayeiro
BC
Cruz
Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, BR.
Willian Giquelin
WG
Maciel
Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, BR.
Gustavo
G
Felippelli
Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, BR.
Weslen Fabricio Pires
WF
Teixeira
Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, BR.
Vando Edésio
VE
Soares
Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, BR.
Alvimar José da
AJ
Costa
Universidade Estadual de Maringá, Umuarama, PR, BR.
Welber Daniel Zanetti
WD
Lopes
D000818:Animals; D001344:Autopsy; D001938:Brazil / Q000453:epidemiology; D004175:Diptera; D000072480:Farms; D007814:Larva; D009198:Myiasis / Q000453:epidemiology / Q000662:veterinary*; D012756:Sheep / Q000469:parasitology*; D012757:Sheep Diseases / Q000453:epidemiology / Q000469:parasitology*