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  • Title: Epidemiology of ovine oestrosis (OEstrus ovis Linné 1761, Diptera: Oestridae) in Sicily.
    Author: Caracappa S, Rilli S, Zanghi P, Di Marco V, Dorchies P.
    Journal: Vet Parasitol; 2000 Oct 01; 92(3):233-7. PubMed ID: 10962161.
    Abstract:
    A survey for oestrosis was carried out in the slaughterhouse at Messine (Sicily) from May 1996 to April 1998. The heads of sheep from local flocks were collected each month. A total of 841 heads were examined according to a validated procedure. 469 (55.8%) were infested by OEstrus ovis larvae. 4423 larvae were harvested: 1829 first instar larvae or L1 (41.4%), 1286 second instar larvae or L2 (29.1%) and 1308 third instar larvae or L3 (29.6%). The mean larval burden for infected sheep was 9.4 larvae with an average of 3.9 L1, 2.7 L2 and 2.8 L3. No period of hypobiosis was recorded. The proportions of larvae in each of the different larval stages was similar from January to September, however, from October to December the percentage of L1 was higher, indicating a period of slowed development. In order to lower the overall prevalence of this disease, it would be necessary to use a parasiticide effective against O. ovis, for all routine parasite control treatments.
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