Histopathologic Features of Trachea and Lungs in Chickens with Chronic Respiratory Disease

Aiza Annisa (Program Studi Pendidikan Profesi Dokter Hewan Fakultas Kedokteran Hewan Universitas Syiah Kuala)
Darmawi Darmawi (Laboratorium Mikobiologi Fakultas Kedokteran Hewan Universitas Syiah Kuala)
Etriwati Etriwati (Laboratorium Patologi Fakultas Kedokteran Hewan Universitas Syiah Kuala)
Ummu Balqis (Laboratorium Patologi Fakultas Kedokteran Hewan Universitas Syiah Kuala)
M. Nur Salim (Laboratorium Patologi Fakultas Kedokteran Hewan Universitas Syiah Kuala)
Nazaruddin Nazaruddin (Laboratorium Patologi Fakultas Kedokteran Hewan Universitas Syiah Kuala)
Dwinna Aliza (Laboratorium Patologi Fakultas Kedokteran Hewan Universitas Syiah Kuala)
Siti Aisyah (Laboratorium Patologi Fakultas Kedokteran Hewan Universitas Syiah Kuala)
Awaluddin Awaluddin (Laboratorium Patologi Fakultas Kedokteran Hewan Universitas Syiah Kuala)
Denny Irmawati Hasan (Laboratorium Patologi Fakultas Kedokteran Hewan Universitas Syiah Kuala)
Muslim Akmal (4Laboratorium Histologi Fakultas Kedokteran Hewan Universitas Syiah Kuala)
T. Zahrial Helmi (Laboratorium Biokimia Fakultas Kedokteran Hewan Universitas Syiah Kuala)
Nuzul Asmilia (Laboratorium Klinik Fakultas Kedokteran Hewan Universitas Syiah Kuala)

Jurnal Medika Veterinaria
Vol 18, No 1 (2024): J.Med.Vet.

The purpose of this case study is to determine the changes that exist in chickens infected with Chronic Respiratory disease (CRD). A broiler male chicken aged ± 40 days was found dead in a chicken basket at Ulee Kareng chicken slaughterhouse in a state of feather loss and feces attached to cloaca, on January 6th, 2023. The chicken was brought to pathology laboratory of Faculty of Veterinary Medicine, Universitas Syiah Kuala for necropsy and organ collection. Organs associated with CRD cases were trachea and lungs and histopathological preparations were carried out, stained with Haematoxylin Eosin, and observed under a microscope. The results of histopathological examination showed hemorrhage and hyperplasia of the tracheal epithelium. Hemorrhage was caused by edema which causes increased vascular permeability and epithelial cell hyperplasia occured due to the body's response to infection or inflammation. In the lungs there was bleeding due to damage to the blood vessel wall which caused increased vascular permeability, so that fluid and blood plasma come out of the blood vessels. Fibrinogen then underwent polymerization which resulted in fibrinous thrombi. Congestion happened as the result of fluid accumulation in a location that occured in a passive process so the fluid failed to escape. Because of the accumulation of fluid (congestion), the blood supply to the lung tissue is interrupted, resulting in several points of necrosis in the lungs.