Pathomorphological characteristics of Chlamydiosis in cats

  • V. Lisova National University of life and environmental sciences of Ukraine
  • A. Savchenko National University of life and environmental sciences of Ukraine
Keywords: cats, chlamydial infection, macroscopic changes, interstitial pneumonia, pulmonary fibrosis, bronchitis, hyperplasia of the spleen, conjunctivitis


The results of the study of the morphological features of pathological processes in organs and tissues of dead cats from chlamydial infection. A study of cadavers (n = 8), cats of different breeds aged from 3 to 6 years old, who lives with the laboratory methods have been diagnosed and identified the pathogen Chlamydia felis. According to historical data from sick animals were recorded various nature and degree of conjunctivitis and pronounced signs of a lesion of the respiratory tract (rhinitis, bronchitis, pneumonia). The main research method was mortem examination, during which the fixed and described the macroscopic changes in the affected organs and tissues. The autopsy was carried out partial evisceration, while selected pathological material for further histological studies. It is shown that the most pronounced damage and characteristic macroscopic changes all dead cats fixed contact in lung tissues and regional lymph nodes (mediastinal and bronchial), and in the spleen. Macroscopic picture of lungs affected varied somewhat depending on the degree of damage and stages of morphogenesis. In most cases (n = 6) lesions in the lungs looked like multiple well-defined lesions that are localized in all lobes of the lungs. Morphological manifestations of chlamydial infection in the investigated dead cats on the macroscopic level following features are: 1) productive inflammation in the lungs in a subtotal and total interstitial pneumonia and pulmonary fibrosis; 2) catarrhal bronchitis; 3) hyperplasia and serous lymphadenitis of the mediastinal and bronchial lymph nodes; 4) hyperplasia of lymphoid nodules of the spleen; 5) serous conjunctivitis. Also, a disease accompanied by nonspecific general pathological processes, such as: passive venous congestion of the liver and kidneys; degenerative changes in the liver; dilation of the right ventricle of the heart, which occurs as a complication of the underlying disease. While studies of other organs and tissues of dead animals we have not found any macroscopic changes.


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How to Cite
Lisova, V., & Savchenko, A. (2017). Pathomorphological characteristics of Chlamydiosis in cats. Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies. Series: Veterinary Sciences, 19(77), 11-14.