Group B

noun

Definition of Group B

: any of various strains of a streptococcus (Streptococcus agalactiae) that include the causative agents of certain infections (such as pneumonia and meningitis) especially of newborn infants usually used attributively
  • Group B streptococcal infections

First Known Use of group b

1965

in the meaning defined above

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Medical Dictionary

Group B

noun \ -ˈbē \

medical Definition of Group B

: the Lancefield group of usually beta-hemolytic streptococci that comprises all strains of a species of the genus Streptococcus (S. agalactiae) and that includes the causative agents of certain infections (as septicemia, pneumonia, and meningitis) especially of newborn infants usually used attributively
  • affected with Group B strep
— compare group a

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