In vitro Phenotypic Antibiotic Susceptibility Profiles Of Food Indicator Bacteria Isolated From Home-Made Oral Rehydration Solutions In Nigeria

Abstract

One thousand and ten bacterial isolates from ORS constituents characterised as Bacillus cereus var. mycoides, Bacillus subtilis, Citrobacter sp., Clostridium perfringes, Enterobacter aerogenes, Escherichia coli, Klebsiella pneumoniae, Morganella morganii, Proteus mirabilis, P. vulgaris, Pseudomonas aeruginosa, Salmonella enterica serovar Typhi, Salmonella enterica serovar Typhimurium, Shigella dysentariae, Staphylococcus aureus and Vibrio cholerae were screened for their in vitro antibiotic susceptibility profiles using the agar discs and agar well-diffusion methods. The Gram-negative bacteria from granulated sugar samples had 7.69% phenotypic resistance profiles while the Gram-negative bacteria from table salt samples had between 13.3% and 20.0% resistance profiles. The resistance profiles of Gram-positive bacteria from granulated sugar samples was between 8.0% and 19.0% while the Gram-positive bacteria from table salt samples had between 11.0% and 27.9 % resistance profiles towards the test antibiotic (discs). The bacterial isolates from granulated sugar exhibited resistance of between 36.4% in ampicillin + cloxacillin and 64.9% in metronidazole. while the bacterial isolates from table salt gave an overall resistance of 41.0% - 64.7% towards the twenty-eight test oral paediatric antibiotic suspensions All the bacterial isolates from the table salt and granulated sugar samples displayed multiple resistance to the test paediatric antibiotics, except Ps. aeruginosa SA12, Shigella dysenteriae SA16C, SA16D, E. aerogenes SA18A, SA18AE and E. coli SA22A which recorded no (0.0%) resistance to all the test paediatric antibiotics.

Keywords: antibiotics, In vitro, ORS, paediatric, resistance, susceptibility

African Journal of Clinical and Experimental Microbiology Vol. 9 (2) 2008 pp. 69-77