What Is Streptococcus Agalactiae?

Streptococcus agalactiae (GBS) is a Gram-positive streptococcus that was named after it was first isolated from cattle with mastitis. It was subsequently isolated in pregnant women and newborns in various countries, which can cause early and late-onset infections in newborns. Streptococcus agalactiae has also been found in various animal and aquatic fish epidemics, so it has received widespread attention. The bacterium can cause sepsis and meningitis in animals, and has a high mortality rate ^[1] .

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Streptococcus agalactiae is the most common type of pathogenic streptococcus, and the most harmful one, which can cause bovine mastitis ^[3]

Penicillin is preferred, followed by antibiotics such as erythromycin, chloramphenicol, clindamycin, ofloxacin, vancomycin ^[2] .