Category: S

Group D faecal or vaginal streptococcus differentiated from Streptococcus faecalis by lack of sorbitol fermentation.  

Faecal streptococcus (Lancefield’s group D) and including the variants faecalis, liquefaciens, and zymogenes. Some types may show haemolysis on blood agar. Faecal streptococci are resistant to heat (60°C) and are able to grow on MacConkey medium—properties not exhibited by other species.  

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.