1. SPANA; 41 Lotissement Zohra, Harhoura Témara 12000 Morocco
2. Department of Pathology; Institut Agronomique et Vétérinaire Hassan II; BP 6202 - Instituts Rabat 10101 Morocco
3. Department of Pathology; Ecole Nationale Vétérinaire de Lyon; BP 83 F-69280 Lyon France