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Table 3

Antibiotic resistance pattern and associated gene determinants in selected isolates

Sample codeSample siteIdentity of IsolatesAntibiotic resistance patternResistance genesVirulence gene (PVL)
Isolates obtained from wastewater samples OPI9E Oxidation pond (inlet) S. aureus TM (TM) dfrG 
OPI10C Oxidation pond (inlet) S. aureus CIP-GM-FOX-T-TM (FOX-T-TM) dfrG, mecA, tetK – 
OPP3A Oxidation pond (pond) S. sciuri E-FD-FOX-GM-TM (FOX-TM) mecA ND 
OPI4G Oxidation pond (inlet) S. sciuri E-FD-FOX-GM-TM (FOX-TM) mecA ND 
OPI8A Oxidation pond (inlet) S. sciuri E-FD-FOX-GM-TM (FOX-TM) mecA ND 
OPO5D Oxidation pond (outlet) S. saprophyticus C-FD-T-TM (T-TM) dfrG, tetK ND 
OPI8H Oxidation pond (inlet) S. pasteuri TM (TM) dfrA ND 
OPP8B Oxidation pond (pond) S. condimenti Susceptible to all – ND 
Isolates obtained from grey-water samples WWPG8F Postgraduate Hall S. sciuri E-FD-FOX-GM-TM (FOX-TM) mecA ND 
WWF8B Fajuyi Hall S. sciuri E-FD-FOX-GM-TM (FOX-TM) mecA ND 
WWM1B Moremi Hall S. saprophyticus C-FD-PG-RP-T-TM (T-TM) tetK ND 
WWF5D Fajuyi Hall S. saprophyticus FD-T-TM (T-TM) dfrA, tetK ND 
WWM8I Moremi Hall S. saprophyticus C-FD-T-TM (T-TM) dfrA, tetK ND 
WWPG8I Postgraduate Hall S. cohnii FD-T (T) tetK ND 
WWPG16E Postgraduate Hall S. cohnii FD-T-TM (T-TM) tetK ND 
WWF4F Fajuyi Hall S. epidermidis E-FD-FOX-GM-TM (FOX-TM) dfrA ND 
WWF10G Fajuyi Hall S. haemolyticus FOX-T-TM (FOX-T-TM) dfrG ND 
WWM4G Moremi Hall S. nepalensis C-T (T) tetK ND 
WWF8D Fajuyi Hall S. warneria TM (TM) dfrA, mecA ND 
WWF5B Fajuyi Hall S. equorum C- FD-FOX- T-TM- (FOX-T-TM) dfrA, tetK ND 
Sample codeSample siteIdentity of IsolatesAntibiotic resistance patternResistance genesVirulence gene (PVL)
Isolates obtained from wastewater samples OPI9E Oxidation pond (inlet) S. aureus TM (TM) dfrG 
OPI10C Oxidation pond (inlet) S. aureus CIP-GM-FOX-T-TM (FOX-T-TM) dfrG, mecA, tetK – 
OPP3A Oxidation pond (pond) S. sciuri E-FD-FOX-GM-TM (FOX-TM) mecA ND 
OPI4G Oxidation pond (inlet) S. sciuri E-FD-FOX-GM-TM (FOX-TM) mecA ND 
OPI8A Oxidation pond (inlet) S. sciuri E-FD-FOX-GM-TM (FOX-TM) mecA ND 
OPO5D Oxidation pond (outlet) S. saprophyticus C-FD-T-TM (T-TM) dfrG, tetK ND 
OPI8H Oxidation pond (inlet) S. pasteuri TM (TM) dfrA ND 
OPP8B Oxidation pond (pond) S. condimenti Susceptible to all – ND 
Isolates obtained from grey-water samples WWPG8F Postgraduate Hall S. sciuri E-FD-FOX-GM-TM (FOX-TM) mecA ND 
WWF8B Fajuyi Hall S. sciuri E-FD-FOX-GM-TM (FOX-TM) mecA ND 
WWM1B Moremi Hall S. saprophyticus C-FD-PG-RP-T-TM (T-TM) tetK ND 
WWF5D Fajuyi Hall S. saprophyticus FD-T-TM (T-TM) dfrA, tetK ND 
WWM8I Moremi Hall S. saprophyticus C-FD-T-TM (T-TM) dfrA, tetK ND 
WWPG8I Postgraduate Hall S. cohnii FD-T (T) tetK ND 
WWPG16E Postgraduate Hall S. cohnii FD-T-TM (T-TM) tetK ND 
WWF4F Fajuyi Hall S. epidermidis E-FD-FOX-GM-TM (FOX-TM) dfrA ND 
WWF10G Fajuyi Hall S. haemolyticus FOX-T-TM (FOX-T-TM) dfrG ND 
WWM4G Moremi Hall S. nepalensis C-T (T) tetK ND 
WWF8D Fajuyi Hall S. warneria TM (TM) dfrA, mecA ND 
WWF5B Fajuyi Hall S. equorum C- FD-FOX- T-TM- (FOX-T-TM) dfrA, tetK ND 

Key – C: Chloramphenicol, CIP: Ciprofloxacin, E: Erythromycin, FD: Fusidic acid, FOX: Cefoxitin, GM: Gentamicin, PG: Penicillin G, RP: Rifampicin, T: Tetracycline, TM: Trimethoprim. ND: Not detected. WWM, WWF, and WWPG: grey-water samples from Moremi Hall, Fajuyi Hall and Postgraduate Hall, respectively. OPI, OPP, and OPO: wastewater samples from oxidation in-let, pond and outlet, respectively. Antibiotics in parenthesis were screened for their resistance genes using PCR.

aPhenotypically susceptible to cefoxitin (27 mm) but mecA positive.

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