A gram positive coccus grows in 6.5 percent sodium chloride and hydrolyzes bile esculin. Which organism is most likely?
1Streptococcus bovis group
2Enterococcus species✓ 정답
3Streptococcus pneumoniae
4Listeria monocytogenes
해설
A positive bile esculin reaction alone does not separate enterococci from the Streptococcus bovis group. Growth in 6.5 percent sodium chloride is the distinguishing test, and growth identifies an Enterococcus. Learn these two tests as a pair.