Epidemiology of sheep infection byOestrus ovisin Algeria

Abstract

Summary :313 sheep were examined in 1 996 to assess the importance and seasonal evolution of Oestrus ovis infection in the Algerian region of El-Tarf. Prevalence was found to be 67.4 %. The larval burden was 18 larvae by infected sheep. The prevalence was higher in older sheep than in lambs; intensity was similar. The different larval stages were found all along the year in sheep with prevalence ranging from 33.1 to 80.5 % for LI, 9.7 to 43.9 % for L2 and 8.4 to 23.0 % for L3. The sheep were the least infected in winter (prevalence from 35.7 to 44 % and intensity seven to ten larvae per sheep). The highest infection was found during the warm season (spring to autumn, prevalence from 62 to 90 % and intensity ranging from 15 to 25). This larval evolution profile suggested the existence of one long cycle (NovemberApril) and possibly two shorts cycles (May-October). This epidemiological pattern is similar to that in Morocco but was slightly different from the situation in Tunisia where the winter cycle was apparently of lesser importance.

Prevalence and intensity of Oestrus ovis in sheep of Shiraz, southern Iran

“…The prevalence of infection (49.7%) found in the present study was higher than that reported from southeast Turkey (36.73%) (Gökçen and Sevgili 2004), but less than what was seen in Sicily (56%) (Caracappa et al 2000), Jordan (58%) (Abo-Shehada et al 2000), southwest France (65%) (Yilma and Dorchies 1991), Algeria (67%) (Benakhla et al 2004) and Konya in Turkey (59%) (Uslu and Dik 2006). The figure was also found to be significantly different from the 93.6% reported from Tunisia (Kilani et al 1986), 91% from Italy (Scala et al 2001), 23% from southwest France (Jacquiet and Dorchies 2002a), 21.9% (Pandey 1989) from Zimbabwe and 22.6% (Gabaj et al 1993) from Libya.…”

“…Moreover, O. ovis larvae has caused about 4.6 kg of meat loss, 200-500 g of wool loss and 10% milk loss per animal (Ilcmann et al 1986). The prevalence of O. ovis in sheep in Europe varies from 21.9% to 93.7% (Pandey 1989;Yilma and Dorchies 1991;Gabaj et al 1993;Caracappa et al 2000;Dorchies et al 2000;Benakhla et al 2004). In Iran too, O. ovis is a potentially major economic problem for sheep producers, however, it has not been studied in detail yet (Jafari Shoorijeh and Moazzeni Jola 2001).…”

Flavonoids and Related Compounds in Parasitic Disease Control

“…Rotenone has been proposed as a treatment for the honeybee mite Varroa destructor [65], the Atlantic salmon Plathyhelminth Gyrodactylus salaris [66], cattle hypodermosis [67] and the sheep louse Bovicola ovis [68].…”

Epidemiology of Oestrus ovis infestations in sheep in Kars province of north-eastern Turkey

“…The prevalence O. ovis infestations in sheep in the world as follows; 33.2-65% in France (Bergeaud et al 1994;Dorchies et al 2000;Jacquiet and Dorchies 2002;Yilma and Dorchies 1991), 71.1% in Spain (Alcaide et al 2003), 55.8-91.0% in Italy (Caracappa et al 2000;Scala et al 2001Scala et al , 2002, 22.6% in Libya (Gabaj et al 1993), 17.2% in Iraq (Jarjees et al 2000), 8.7% in Egypt (Amin et al 1997, 58% in Jordan (Abo-Shehada et al 2000), 5.5% in Saudi Arabia (Alahmed 2000), 21.0% in Ethiopia (Bekele and Mukasa-Mugerva 1994), 10-100% in Morocco (Pandey and Ouhelli 1984), 67.4% in Algeria (Benakhla et al 2004), 6-52% in Zimbabwe (Pandey 1989), and 8.1% in India (Pathak 1992). Oestrosis is commonly seen in sheep and goats in Turkey.…”