Open Access
Research (Published online: 14-04-2019)
6. Oestrus ovis in Ecuador: Importance in the Andean sheep farming
Gabriela Ortega-Munoz, Nivia Luzuriaga-Neira, Richard Salazar-Silva and Richar Rodriguez-Hidalgo
Veterinary World, 12(4): 522-526

Gabriela Ortega-Munoz: Department of Parasitology , Medicine, Veterinary and Zootechnic Faculty, Central University of Ecuador, EC170521, Quito, Ecuador.
Nivia Luzuriaga-Neira: Department of Parasitology , Medicine, Veterinary and Zootechnic Faculty, Central University of Ecuador, EC170521, Quito, Ecuador; Wildlife Conservation Research Unit, Central University of Ecuador, EC170521, Quito, Ecuador.
Richard Salazar-Silva: Department of Parasitology , Medicine, Veterinary and Zootechnic Faculty, Central University of Ecuador, EC170521, Quito, Ecuador.
Richar Rodriguez-Hidalgo: Department of Parasitology , Medicine, Veterinary and Zootechnic Faculty, Central University of Ecuador, EC170521, Quito, Ecuador; Parasitology Unit, Public Health and Zoonosis Research Institute, Central University of Ecuador EC170521, Quito, Ecuador.

doi: 10.14202/vetworld.2019.522-526

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Article history: Received: 05-11-2018, Accepted: 25-02-2019, Published online: 14-04-2019

Corresponding author: Richar Rodriguez-Hidalgo


Citation: Ortega-Munoz G, Luzuriaga-Neira N, Salazar-Silva R, Rodriguez-Hidalgo R (2019) Oestrus ovis in Ecuador: Importance in the Andean sheep farming, Veterinary World, 12(4): 522-526.

Aim: This study aimed to determine the prevalence of Oestrus ovis in sheep meant for meat commercialization in the main slaughterhouse of the country.

Materials and Methods: Between October 2015 and December 2015, we assessed the occurrence of Oestrus myiasis in the main slaughterhouse localized in Quito. In total, 80 sheep heads were randomly inspected and necropsied. Larvae were removed from nasal cavities and paranasal sinuses and cleaned. ANOVA (generalized linear model) was used to estimate the relationship between sex, age, and place of origin and presence or absence of parasite larvae.

Results: Morphological identification confirmed that 19% (15/80) of the examined animals were positive for Oestrus ovis; from the positive cases, 21% were young animals <12 months old. We found that statistical differences by animal sex, males, were most infested 93% (14/15) than females 7% (1/15). Larvae's L2 were more abundant than other stages (62 of the total 149). 14 of the infested animals were from the Andean places at > 2500 meters above sea level (m.a.s.l.), and only one case from the coastal region at 250 m.a.s.l. with tropical environmental conditions.

Conclusion: Our results showed evidence of the presence of myiasis caused by O. ovis in Andean and coastal places in Ecuador and its adaptation to different environmental conditions from that reported previously in temperate regions from Europe and Africa.

Keywords: Ecuador, Ecuadorian highlands, oestrosis, Oestrus ovis, sheep.


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