BioMed Research International

Research Article

Isolation, Identification, and Antimicrobial Susceptibility of Bacteria Associated with Waterpipe Contaminants in Selected Area of Saudi Arabia

Table 4

Antibiotics susceptibility against selected Gram-positive bacteria.
Antimicrobial agents Bacteria
Staphylococcus aureusStreptococcus pneumoniaStaphylococcus vitulinusStreptococcus thoraltensisAerococcus viridiansKocuria rhizophila
MICInterMICInterMICInterMICInterMICInterMICInter
Cefoxitin screenPOS+NEG—POS+POS+NEG—NEG—
Benzylpenicillin≥0.5R≥0.5R≥0.5R≥0.5R≤0.5S≤0.5S
Oxacillin≥4R≤0.5S≥4R≥4R≤0.5S≥4R
Inducible clindamycin resistanceNEG—NEG—NEG—NEG—NEG—NEG—
Erythromycin4R4R≥8R≥8R≤0.5S≤0.5S
Clindamycin0.5R≤0.5S≥8R≥8R≤0.5S≤0.5S
Linezolid4S4S≥8R≥8R4S4S
Teicoplanin4S4S≥32R≥32R4S≤0.5S
Vancomycin2S2S≥32R≥32R2S1S
Tetracycline≤1S≤1S≥16R2R≤1S4R
Fosfomycin16S16S≥128R≥128R16S16S
Nitrofurantoin64I≤16S≥512R≤16S≤16S≤16S
Fusidic acid8I≤0.5S≥32R≥32R≤0.5S≤0.5S
Rifampicin4R≤0.5S≥32R≥32R≤0.5S≤0.5S
Trimethoprim/sulfamethoxazole≥320R≤10S80R≤10S≤10S≤10S
S = susceptible; I = intermediate; R = resistance; modified; MIC = minimum inhibition concentration; Inter = interpretation.