Publication Title

Antimicrobial Drug Resistance Of Escherichia Coli Isolated From Exposed Poultry Abattoir Workers And Broilers On Antimicrobials
J .W. Oguttu*, C .M. Veary and J. A. Picard
Year of Publication: 

Publication Abstract

Antimicrobial usage in food animals increases the prevalence of antimicrobial drug resistance among their enteric bacteria. It has been suggested that this resistance can in turn be transferred to people working with such animals nlike abattoir workers. Antimicrobial drug resistance was investigated for Escherichia coli from broilers raised on feed supplemented with antimicrobials, and the people who carry out evisceration, washing and packing of intestines in a high throughput poultry abattoir in Gauteng, South Africa. Broiler carcasses were sampled from 6 farms, each done in a separate “grow-out cycle”. Per farm, 100 caecae were randomly collected five minutes after slaughter and each of the contents were selectively cultured for E. coli. The minimum inhibitory concentration (MIC) was determined of each isolate for the following antimicrobials: doxycycline, trimethoprim, sulphamethoxazole, ampicillin, enrofloxacin, fosfomycin, ceftriaxone and nalidixic acid. The same was done on the faeces of 29 abattoir workers and 28 persons used as controls. The majority of isolates from broilers were resistant, especially to antimicrobials that were used on the farms in the study. Overall median MICs and the number of resistant isolates from abattoir workers (packers plus eviscerators) tended to be higher than for the control group. However, no statistically significant differences were observed when the median MICs of antimicrobials used regularly in poultry and percentage resistance were compared. Nor could an association between resistance among the enteric E. coli from packers and those from broilers be shown.