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Antibiotic sensitivity of microorganisms isolated from remnant foods and wastewater in restaurants was assessed.
Samples obtained from different restaurants were microbiologically examined and sensitivity to antibiotics by isolates
was carried out by conventional methods. The microbial load in remnant foods and wastewater samples ranged from
7.3×108 cfu/ml to 8.4×108 cfu/ml and 1.0×105 sfu/ml to 1.3×105 sfu/ml for bacteria and fungi respectively. The
following microorganisms; Staphylococcus aureus, Salmonella typhi, Escherichia coli, Klebsiella pneumoniae,
Serratia marcescens, Shigella dysenteriae, Pseudomonas aeruginosa, Bacillus subtilis, Rhizopous stolonifer,
Aspergillus niger, Triscelophorus monosporus, Mucor mucedo were isolated. Highest percentage occurrence was
observed for Aspergillus niger (24.1%) while the lowest was observed for Pseudomonas aeruginosa (1.1%). The
isolates exhibited various levels of resistance to augmentin (83.3%), nitrofurantoin (80%), gentamycin (83.3%),
amoxicillin (75.0%), cotrimoxazole (80%) and ceftriazone (62.5%). The percentage resistance to tetracycline by
Escherichia coli and Salmonella typhi isolated from remnant foods was 80 and 87.5 respectively. Staphylococcus
aureus from remnant foods and wastewater have resistance percent of 58.3 and 50 to chloramphenicol. The multiple
resistances displayed by isolates against commonly available antibiotic portends a great danger of laden the
environment with potential pathogens by the indiscriminate disposal of remnant foods and wastewater.
Key words: antibiotics resistance, restaurants, remnant foods, wastewater, environment