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Species associated occasionally with human disease, and classified as Lancefield Group C. A species that has been isolated from the upper respiratory tract. It may be associated with erysipelas, puerperal sepsis, pneumonia, osteomyelitis, bacteremia, and endocarditis.  

Horse-infecting species of Lancefield Group C.  

Animal-infecting species (especially in bovine mastitis), of Lancefield Group C.  

Non-sorbitol-fermenting faecal or vaginal streptococcus of Lancefield’s Group D.  

Non-sorbitol-fermenting faecal or vaginal streptococcus of Lancefield’s Group D. A species found in the alimentary tract of cattle. It may cause endocarditis in humans.  

Predominantly animal-infecting species (especially bovine mastitis) occasionally found in man. Group B of Lancefield’s classification. A group B β-hemolytic species found in raw milk that is the leading cause of bacterial sepsis and meningitis in newborns and a major cause of endometritis and fever in postpartum women.  

Type-species and indeed only species of the Streptobacillus genus, a member of the Bacteroidaceae family, streptobacilli are extremely pleomorphic. Gram-negative organisms the shape of which varies from short rods to long interwoven filaments which may fragment into chains of bacilli or cocco-bacilli. Monilia-like swellings of the filaments may occur. Poorly viable on culture, which needs…

Testicular enlargement in guinea-pigs, following intraperitoneal injection with Acinetobacter mallei.  

Straight length of (platinum, Nichrome) wire in holder for the subculture of small colonies, and the inoculation of stab culture- introducing minimal air.  

The break-up of the acid-coagulated clot in a milk culture of Cl. welchii and of some other saccharolytic organisms-e.g., Cl. butyricum—due to the action of gas formation.