FOAL DISEASES CAUSED BY RHODOCOCCUS (CORY NEBACTERIUM) EQUI IN A HUNGARIAN HORSE STOCK

During the gross-pathological and bacteriological investigation of the organs of three (two Holstein and a Hungarian Half-blood) foals origi nated from a Hungarian horse stock with 110 horses, lymphadenitis of p ulmonary, mediastinal and mesenteric lymph nodes with granuloma format ion and caseation, as well as peritonitis and ulcerous enteritis in th e small and large intestines (Figs 1 to 5 and Fig. 8). Based on the in terstitial, interalveolar pneumonia found during the histopathological investigations, besides the bacteriological infection, a viral infect ion was also supposed. Bacteria coloured by PAS and Brown-Brenn stain and non-coloured by Ziehl-Neelsen stain were found mostly intracellula r (Figs 6 and 7). In relation with the prevention, the authors have po inted out the importance of proper feeding and management, as well as the prevention of viral infections. More important clinical, epizootio logical and pathological knowledge found in the international literatu re have been briefly reported together with the possibilities of treat ment. From pathological point of view new data have been furnished to the histogenesis of the enteral form of the disease.