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词汇 Streptococcus agalactiae
分类 英语词汇 英语翻译词典
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Streptococcus agalactiae

英语百科

Streptococcus agalactiae

β-hemolytic colonies of Streptococcus agalactiae, blood agar 18h at 36°C
Positive CAMP test indicated by the formation of an arrowhead where Streptococcus agalactiae meets the Staphylococcus aureus (white middle streak)
Red colonies of S.agalactiae in granada agar. Vagino-rectal culture 18h incubation 36°C anaerobiosis
Streptococcus agalactiae colonies in chromogenic medium (ChromID CPS chromogenic agar)

Streptococcus agalactiae (also known as group B streptococcus or GBS) is a Gram-positive coccus (round bacterium) with a tendency to form chains (as reflected by the genus name Streptococcus). It is a beta-hemolytic, catalase-negative, and facultative anaerobe. In general, GBS is a harmless commensal bacterium being part of the human microbiota colonizing the gastrointestinal and genitourinary tract of up to 30% of healthy human adults (asymptomatic carriers).

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