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Group B streptococcus infection (GBS), also known as strep B and group B strep, is infection with the bacteria ''Streptococcus''. Group B streptococcal infection can cause serious illness and sometimes death, especially in newborn infants, the elderly, and people with compromised immune systems. The CAMP test is an important test for identification. GBS (group B Streptococcus species) are screened through this test. It is characterized by the presence of group B Lancefield antigen and by its ability to hydrolyze sodium hippurate. It is also sensitive to bile, and will lyse in its presence. Group B streptococci are also a common veterinary pathogens, because they can cause bovine mastitis (inflammation of the udder) in dairy cows. The species name "agalactiae" meaning "no milk", alludes to this. ==Newborns== Group B ''Streptococcus'' (GBS) is a part of normal flora of the gut, about (15-20%) in the genital tract and is found in 20–40% women. It may be harmful to both mother and the baby itself. Maternal colonisation by this organism may result in neonatal death due to severe neonatal infection. It may also result in maternal death, though only occasionally, by causing upper genital tract infection that progresses to septicemia. Carriage of the organism is asymptomatic.〔Obstetrics by Ten Teachers, 18th edition〕 Newborn GBS disease is separated into early-onset disease, which occurs in the first seven days after birth, and late-onset disease, which starts between seven and 90 days after birth. Early-onset septicemia is more prone to accompaniment by pneumonia. This is believed due to aspiration of GBS during birth, while late-onset septicemia is more often accompanied by meningitis. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Group B streptococcal infection」の詳細全文を読む スポンサード リンク
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