Table 1.

A subset of entries in the bug-drug logic table. M = “measured” - the susceptibility of the isolate for this antibiotic is measured in the lab. R = “resistant” - this antibiotic is never effective for this pathogen. S = “susceptible” - currently, this antibiotic is always effective for this pathogen. The entry “~penicillin” signifies that the result for penicillin serves as a surrogate for this antibiotic.

Drug	Streptococcus pneumoniae
penicillin	M
ampicillin	~penicillin
amoxicillin	~penicillin
cefuroxime	~penicillin
ceftriaxone	M
cefotaxime	M
ceftazidime	R
vancomycin	S