Antibiotic Susceptibility Profile of Bacterial Pathogens Isolated from Malabor Hostel Tap Water, Calabar- Nigeria

The antibiotic resistance and susceptibility profiles of some bacterial isolates including Listeria monocytogenes, Erwinia stewartii, Legionella pneumophilia, Carnobacterium gallinarum, Staphylococcus caseolyticus, Enterobacter dissolves, Pseudomonas mallei, Klebsiella pneumonia, Aeromonas media and Lactobacillus sp. were determined using some broad and narrow spectrum antibiotics by the disk diffusion technique. Based on the Clinical and Laboratory Standards Institute (CLSI) interpretive criteria, some isolates were found to be resistant to some of the tested antibiotics but susceptible to others. Among the Gram-positive bacterial isolates, Lactobacillus specie had the highest susceptibility profile with the zone of clearance ranging from 28 - 30 ± 8 mm in diameter. However, among the Gram-negative bacterial isolates, Pseudomonas mallei, Klebsiella pneumoniae and Aeromonas media were susceptible to all tested antibiotics, with 30 mm ± 0 mm zones of clearance. CLSI standards were used to interpret results; while Lactobacillus sp. was the most susceptible isolate, Erwinia stewartii was resistant to all the test antibiotics except ceporex.