1. Department of Veterinary Sciences, School of Veterinary Medicine Ambo University Ambo Ethiopia
2. National Animal Health Diagnostic and Investigation Center Sebeta Ethiopia
3. Istituto Zooprofilattico sperimentale della Sicilia “A. Mirri” Area Territoriale Barcellona Pozzo di Gotto Italy
4. Laboratory of Genetics of Microorganisms Istituto Zooprofilattico Sperimentale of Sicily Palermo Italy