Prevalence and intensity of Oestrus ovis in sheep and goats in south-eastern part of Turkey

Abstract

Oestrosis is a parasitic disease which is prevalent among sheep and goats in Mediterranean region. Slaughter house surveys to determine the prevalence and intensity of infestation by Oestrus ovis Linnaeus (Diptera: Oestridae) in sheep and goats, were conducted monthly for one year in south-eastern region of Turkey. A total of 804 heads belonging to 724 sheep and 80 goats were examined for Oestrus ovis larvae between May 2014 and April 2015. 72.75% of sheep heads and 50% of goat heads were seen to be infested with Oestrus ovis larvae. Of a total of 4723 larvae found in sheep heads, 2245 were detected to be first instars larva, 1231 second instars larva, 1247 third instars larva. Of a total of 259 larvae detected in goats, 150 were first instars larva, 79 second instars larva, 30 third instars larva. The mean of larval burden per infested animal was significantly higher in sheep (8.8±5.9) than in goat (6.5±5.0) (P < 0.05). Monthly distribution of first, second and third instars larvae indicate that adult flies are active between April and end of September, first instars larvae enter hypobiotic period in October. In conclusion, it was revealed that to use an effective drug against Oestrus ovis that will be done during reproductive period of flies should start in April and continue until the end of summer due to high rates of oestrosis, parasite treatment that will be done when reproductive period ends should be done in October and November in the southeast part of Turkey.

The corrosion inhibition of carbon steel in 1 M HCl solution by Oestrus ovis larvae extract as a new bio–inhibitor

“…It was noticeable that adult female flies are ovoviviparous; they deposit newly hatched first-stage larvae that enter the nostrils of the host. The image of OO L evolution is shown in Figure 1 (a) [ 15 ]. They were kept for 48 h in 70% ethanol for the extraction process.…”

“…The parasites were then crushed with a mortar and then dried [ 16 ], as shown in Figure 1 (b).

Figure 1 Images of (a) Oestrus ovis larvae ( OOL ) [ 15 ], (b) the powder extract of OOL .

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First Report of Sheep Botfly Oestrus Ovis (Linnaeus) (Diptera: Oestridae) From the Nasal Sinus of Slaughtered Goat in the Republic of Yemen

“…Considerably significant economic losses and less animal production lead due to pathogenic effects. Furthermore, Interference with feeding and rumination reduces weight gain and may reduce milk andwool production which has been roughly calculated as up to 22% in body weight, 16% in wool production and 10 % milk per animal (Ipek, 2018).…”

ASSOCIATIONS BETWEEN PRL/RsaI POLYMORPHISM AND SOME PERFORMANCE TRAITS IN HOLSTEIN CATTLE REARED UNDER ORGANIC CONDITION

“…The pathogenic effects lead to considerably less animal production and significant economic losses. Interference with feeding and rumination reduces weight gain and may reduce milk and wool production which has been roughly calculated as up to 22% in body weight, 16% in wool production and 10 % milk per animal (Dorchies et al, 1993;Ipek, 2018). Oestrosis is additionally regarded as a zoonotic disease.…”