Al-Khalidi AAH. Pathological Changes Induced by Systemic Bacterial Infections of Layer Hens Suffered from Respiratory Signs. DJVS [Internet]. 2023 Jul. 2 [cited 2025 Jun. 15];1(2):99-109. Available from: https://mail.djvs.uodiyala.edu.iq/index.php/djvs/article/view/102