Pathohistological changes in pigs with mycoplasmosis

N. B. Kolych, N. V. Hudz


The paper presents the results of studying the morphological features of pathological processes in organs and tissues of cats with chlamydia infection. A study of the corcasses of cats of different breeds at the age from 2 to 5 years was carried out, in which the pathogen of chlamydia was diagnosed by laboratory methods during life.

The main research method was postmortem examination and histological examination.

According to anamnestic data, in sick animals various types and stages of conjunctivitis and pronounced signs of damage to the respiratory tract were recorded. The most notable injuries and characteristic macroscopic changes in all dead cats were recorded in the tissues of the lungs and regional bronchial lymph nodes, as well as in the spleen.

Morphological manifestations of chlamydial infection at the macroscopic level are: catarrhal-purulent conjunctivitis and rhinitis, pneumonia in the form of interstitial pneumonia and pneumosclerosis; catarrhal-purulent bronchitis; hyperplasia and serous lymphadenitis of bronchial lymph nodes. Edema of the organ stroma, as well as the presence of eosinophils in inflammatory infiltrates, testify to the allergization of the body.

Necrobiotic and dystrophic changes in the parenchymal organs occured due to long-term persistence of chlamydia and during the formation of elementary bodies. Chlamydia immunity is assessed as non-sterile. Persistent immunity does not develop in animals that have been sick.

The manifestation of chlamydia infection at microscopic level is characterized by: interstitial pneumonia and pneumosclerosis, fibrinous-purulent pleuropneumonia, hyperplasia of the lymphoid nodules of the spleen; passive venous hyperemia of the liver and kidneys, granular and fatty degeneration of the liver.

Key words: chlamydia, cats, pulmonary fibrosis, bronchitis, conjunctivitis

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