Pathomorphological changes in the organs in aspergillosis in the shouter swan (clinical case)

Abstract

   Consideration and analysis of diseases of wild bird species is complicated, especially those listed in the Red Book.   This work aimed to identify the pathomorphological features of the manifestation of aspergillosis in the mute swan and to assess the impact of this disease on the microbiocenosis of the lungs and the morphological structure of organs without cavities.   The scientific work was conducted at the Department of Anatomy and Physiology of the Federal State Budgetary Educational Institution of Higher Education of the State Agrarian University of the Northern Trans-Urals.   The object of study was the internal organs of a mute swan delivered for a post-mortem autopsy to determine the cause of death of the bird.   All internal organs were examined pathoanatomically, and morphometry was performed and carried out bacteriological and mycological studies of the lungs according to traditional methods in microbiological practice. Histological study of such internal organs as the liver, kidneys and spleen was carried out using the generally accepted method. As a result of the analyses, it was established that a characteristic feature of the pathomorphological manifestation of aspergillosis was a topical lesion of the respiratory system with the formation of multiple tumour-like foci of two types in the lungs anddestructive changes in the structure of the tissue of the liver, kidneys and spleen. Congestive venous hyperemia is expressed in all organs, which indicates chronic heart failure. In the liver and kidneys, there are pronounced signs of tissue necrosis, which is a sign of the toxic effects of this disease on the body. In the spleen of the mute swan, the growth of red pulp may indicate an increase in the functioning of the immune system in this pathology. Five types of microorganisms from different subkingdoms were isolated from the mute swan’s lungs. Taking into account the peculiarities of the development of pathological changes and the degree of priority of one or another type of microorganism in the formation of lung pathology in birds, it has been established that Aspergillus fumigatus is the leading pathogen in the development of pathological changes in the lungs of the mute swan.