1. Dept. of Veterinary Pathology and Public Health, Jordan Univ. of Science and Technology; P.O. Box (3030) Irbid 22110 Jordan
2. Dept. of Basic Medical Sciences; Faculty of Veterinary Medicine, Jordan Univ. of Science and Technology; P.O. Box (3030) Irbid 22110 Jordan
3. Dept. of Nutrition and Food Technology; Faculty of Agriculture, Jordan Univ. of Science and Technology; P.O. Box (3030) Irbid 22110 Jordan