1. National Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Dokki, Giza, Egypt
2. These authors have contributed equally
3. Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald Insel-Riems, Germany
4. Food and Agriculture Organization of the United Nations (FAO), Emergency Centre for Transboundary animal Diseases (ECTAD), Cairo, Egypt
5. Food and Agriculture Organisation of the United Nations (FAO), Animal Production and Health division, Viale delle Terme di Caracalla, Rome, Italy