FIG 1 .

Effect of antibiotics on swimming and swarming motility in MDR Salmonella isolates. Chloramphenicol, tetracycline, streptomycin, and kanamycin at indicated concentrations were added to swimming and swarming agar media to determine their effect on motility in six MDR S. Typhimurium isolates. Growth was normalized to the no-antibiotic control for each isolate, and data were expressed as fold changes for all pairwise comparisons for each antibiotic, isolate, and motility combination. Statistical differences are noted by letters (P < 0.05), where any pairwise combination that shares the same letter is not considered different.