Pathogenicity and vaccine efficacy of two virulent infectious laryngotracheitis virus strains in Egypt. - El-Saied, Mohamed; El-Mahdy, Magdy M.; Bayoumi, Mahmoud; Soliman, Reem A.; Elsayed, Marwa. F.; Sakr, Ezz El-Din; Bastami, Mostafa; El-Safty, Munir M.; Shaalan, Mohamed (BMC Veterinary Research, 2022)