I Bassey

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

The antibiotic resistance and susceptibility profil es of some bacterial isolates including Listeria monocytogenes, Erwinia stewartii, Legionel la pneumophilia, Carnobacterium gallinarum, Staphylococcus caseolyticus, Enterobact er dissolves, Pseudomonas mallei, Klebsiella pneumonia, Aeromonas media and Lactobaci llus sp. were determined using some broad and narrow spectrum antibioticsby the disk di ffusion technique. Based on the Clinical and Laboratory Standards Institute (CLSI) interpret ive criteria, some isolates were found to be resistant to some of the tested antibiotics but sus ceptible to others. Among the Gram-positive bacterial isolates, Lactobacillus specie had the hi g est 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 30mm ± 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.

Bacteriological and Physicochemical Quality of Malabor Hostel Tap Water - University of Calabar, Nigeria

Tap water samples collected from different halls in Malabor hostel were analyzed for total heterotrophic bacteria count, total and faecal coliform counts using direct plating and membrane filtration methods. Total heterotrophic bacterial counts ranged from 3 to 80 cfu/ml, corresponding to the total heterotrophic bacterial counts obtained from Hall 4 and Hall 9 samples respectively. Total coliform counts ranged from 28 cfu/ml to 126 cfu/ml, corresponding to the total coliform counts obtained from Hall4 and Hall9, respectively. No faecal coliform was detected at 35 – 37°C in all samples even after 72 hours of incubation. Bacterial isolates identified include: Listeria monocytogenes, Erwinia stewartii, Legionella pneumophilia, Carnobacterium gallinarum, Staphylococcus caseolyticus, Enterobacter dissolves, Pseudomonas mallei, Klebsiella pneumonia, Aeromonas media and Lactobacillus sp. Lactobacillus sp. had the highest percentage of occurrence (23%). The physicochemical and heavy metal quality of samples were compared with WHO and SON standards for drinking-water, and results showed that samples were too acidic and contained an unhealthy amount of Aluminum ion (Al). Original Research Article Mmuoegbulam et al.; ARRB, 13(5): 1-12, 2017; Article no.ARRB.33920 2