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Elucidation of the bacteriological background of cases diagnosed as urticarial lesions of swine erysipelas during meat inspection



Elucidation of the bacteriological background of cases diagnosed as urticarial lesions of swine erysipelas during meat inspection



Magyar Allatorvosok Lapja 44(4): 241-243



According to the observations of three years (1984, 1986, 1987), results of complementary bacteriological investigations, the bacteriological background, of pigs showing urticarial lesions of swine erysipelas during meat inspection have been reported. Of 39 affected swine sent for complementary laboratory meat investigation, E. rhusiopathiae was isolated in 8 cases (20.5%). Beta haemolytic streptococci and those belonging to the viridans group were isolated in 14 cases (35.89%). Bacteriaemia was diagnosed in 3 cases and septicaemia in 4 cases. Streptococci were isolated only from the affected skin in 6 cases and only from the kidneys in a single case. Staphylococci were isolated only from the affected skin in another single case. Meat only limited passed for food due to pH 6,6 in 4 cases and because "the viscera and musculature were moderately contaminated by saprophytic bacteria" in 8 cases. In two cases, meat was qualified of lower nutritive value because of strange smell. In 9 cases (23%), meat proved to be appropriate for consumption beside the partial confiscation of affected skin. It has been pointed out that clinical pictures resembling urticarial lesions of swine erysipelas may also be elicited by toxins of streptococci and staphylococci, affecting the smooth muscle of cutaneous blood vessels. However, these urticarias are rectangle, purplish-red and do not rise from the surroundings. The practical observations that pigs apparently suffering from urticarial lesions of swine erysipelas do not recover after penicillin-treatment is explained by the pathological effect of staphylococci and streptococci.

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