Etude comparative des caractères biochimiques de tréponèmes hémolytiques isolés du porc

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Abstract
A number of hemolytic strains of treponemas were isolated from normal pigs and pigs which died of swine dysentery. According to their hemolytic pattern, these strains can be differentiated into strongly .beta.-hemolytic and weakly .beta.-hemolytic. According to Kinyon and Harris, aside from enteropathogenicity and hemolytic pattern, both fructose fermentation and indole production are the characteristics used in separating the 2 groups of treponemas. Comparative study of these 2 groups of strains shows that while fermentation activity is low for strongly .beta.-hemolytic strains it is high for weakly .beta.-hemolytic strains. The latter constitutes a heterogeneous group which, contrary to Kinyon and Harris, can only be differentiated from the other strains by their ability to ferment lactose and to produce isovaleric acid in glucose supplemented broth.