13.若一株β-溶血性鏈球菌,對0.04 unit bacitracin呈感受性,CAMP test陰性,PYR test陽性,則其
最可能為下列何種菌?
(A)Group A Streptococcus
(B)Group B Streptococcus
(C)Group C Streptococcus
(D)Group D Streptococcus
19.下列何種E. coli會引起旅行者腹瀉,出現不帶有血或黏液的水樣腹瀉?
(A)Enterohemorrhagic E. coli(EHEC)
(B)Enteropathogenic E. coli(EPEC)
(C)Enterotoxigenic E. coli(ETEC)
(D)Enteroinvasive E. coli(EIEC)