HIGHLIGHTS
- who: Marwa M. Safwat from the Virus titration The titer was determined by Veterinary Serum and Vaccine Research Institute (VSVRI), Abbassia, CairoConfluent monolayers of chicken embryo liver (CEL) cells prepared from, d old specific pathogen free embryos were used for inoculation of liver supernatants according to [33]. The supernatant was collected and stored at, C. Experimental study One hundred White Leghorn Layer chicks were received at one day old and kept in experimental units of Avian and Rabbit Medicine Department, Faculty of Veterinary Medicine, Assiut University approved by The National Ethical Committee of The Faculty of Veterinary . . .
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