Role of and Association Between Pasteurella (Mannheimia) Species and Oestrus ovis in Frontal Sinusitis and Rhinitis in Awassi Sheep in Northern Jordan
World Small Animal Veterinary Association World Congress Proceedings, 2004
Saeb Nazmi El-Sukhon, Nareman M. Abu-Kuhail
Faculty of Veterinary Medicine Jordan University of Science & Technology, Irbid, Jordan

Heads of 100 Awassi sheep were examined for etiology of frontal sinusitis and rhinitis in Jordan. Both affections associated significantly (p < 0.05) and were diagnosed in 65% and 90%, respectively and were found to be significantly different (p< 0.05) among the examined age-groups. A total of 58 (58%) bacterial strains were diagnosed as members of Pasteurella/Mannheimia (P/M). Of those, 27 isolates were purely isolated. Besides, the L2 and/or L3, O. ovis larval stages were collected from 56 (56%) heads. Sinusitis and rhinitis affections associated significantly (p< 0.05) with the number of collected living, unlike the dead, L2 instars.

The M. haemolytica, M. trihalosi and P. multocida, were identified in 50%, 36.2% and 13.8%, respectively. All of the Pasteurella/Mannheimia isolates were lethal to Swiss Albino mouse and produced the siderophore while 28 (48%) of them could agglutinate the sheep RBCs.

The larvicidal effect of Pasteurella/Mannheimia isolates was examined on L2 O. ovis larval stage. The highest effect was demonstrated within 24 hours. The three identified Pasteurella/Mannheimia species revealed a larvicidal effect fluctuated between 62% and 64% while their mouse lethality fluctuated between 67% and 88%. Sheep frontal sinusitis and rhinitis were concluded to be highly prevalent in Awassi sheep in Jordan especially among the elder animals with remarkable association between Pasteurella/Mannheimiaspp. and O. ovis causative agents. Further study on the larvicidal effect of Pasteurella is invited.

Speaker Information
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Saeb Nazmi El-Sukhon
Faculty of Veterinary Medicine Jordan University of Science & Technology
Irbid, Jordan

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