title: Characterization and incidence of pigment production by human clinical group B streptococci.
abstract: Pigment was produced in stab cultures by 97% of 297 group B streptococci isolated from human clinical specimens. The pigment, which was associated with a membranous cell fraction, showed a four-banded absorption spectrum similar to that of a carotenoid, with maxima at 435, 566, 485, and 525 nm. Addition of glucose to the growth medium suppressed pigment production in most strains. Only 37% of strains from bovine sources produced pigment.
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D002338:Carotenoids / Q000032:analysis; D002417:Cattle; D005260:Female; D005947:Glucose / Q000378:metabolism; D006801:Humans; D008414:Mastitis, Bovine / Q000382:microbiology; D010860:Pigments, Biological / Q000032:analysis / Q000096:biosynthesis*; D013290:Streptococcal Infections / Q000382:microbiology*; D013292:Streptococcus agalactiae / Q000145:classification / Q000378:metabolism*
chemical_list: D010860:Pigments, Biological; D002338:Carotenoids; D005947:Glucose