Suppurative periarthritis in an infant due to the suipestifer bacillus.

Salmonella infections in infancy and early childhood show a marked tendency to invade the blood-stream and produce foci of suppuration in various organs and tissues. Certain strains appear to become localized in particular sites; thus b. enteritidis (Gaertner's bacillus) and the closely related b. dublin, frequently infect the meninges causing suppurative meningitis. B. suipestifer (the hog cholera bacillus), on the other hand, tends rather to produce lesions in bones and joints. The following case of suipestifer infection illustrates involvement of the periarticular tissues of the right shoulder joint.