Etiology:  β-Hemolytic Streptococci are Gram-positive cocci.  This bacterium is a low-grade opportunist, and overgrowth can occur when there are extreme stressors associated with experimental manipulation or compromise of the immune system [4].

Incidence:  Uncommon, but has been reported in experimentally manipulated mice.

Transmission:  Transmission occurs through direct contact with infective nasopharyngeal secretions.  Streptococci may be spread from humans to animals.

Clinical Signs:  No signs of clinical disease have been reported in immunocompetent mice.

Diagnosis:  Diagnosis should be made by culture of the organism in conjunction with the presence of other clinical signs.

4.            Geistfeld, J.G., et al., Epizootic of group B Streptococcus agalactiae serotype V in DBA/2 mice. Lab Anim Sci, 1998. 48(1): p. 29-33.