Comparing antibiotic resistance in commensal and pathogenic bacteria isolated from wild-caught South Carolina shrimps vs. farm-raised imported shrimps.
The objective of this study was to assess and differentiate wild-caught South Carolina (SC) shrimps from imported shrimps on the basis of microbiological analysis. Seven wild-caught SC shrimp and 13 farm-raised imported shrimp samples were analyzed. Total plate counts from wild-caught shrimp samples ranged from 4.3 to 7.0 log10 CFU/g, whereas counts from imported shrimp samples ranged from 3.2 to 5.7 log10 CFU/g. There was no difference (P > 0.05) between total bacterial counts of wild-caught SC shrimp and farm-raised imported shrimp. However, the percentages of bacteria with reduced susceptibility towards ceftriaxone and tetracycline were higher (P < 0.05) for farm-raised shrimp than for wild-caught samples. Salmonella spp. detected only in one farm-raised sample was resistant to ampicillin, ceftriaxone, gentamicin, streptomycin, and trimethoprim. Vibrio vulnificus was detected in both wild-caught and farm-raised shrimp samples; however, only the isolate from farm-raised shrimp was resistant to nalidixic acid and trimethoprim. Escherichia coli detected in one wild-caught sample was resistant to ampicillin. Both Listeria spp. and Salmonella spp. were absent with wild-caught SC samples. Therefore, the presence of more ceftriaxone- and tetracycline-resistant bacteria and the observed antimicrobial resistance phenotypes of isolates from the imported shrimp may reflect the possible use of antibiotics in raising shrimp in those countries.
Boinapally
Kavitha
K
217 P&A Building, Department of Food Science and Human Nutrition, Clemson University, Clemson, SC 29634, USA.
Jiang
Xiuping
X
D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D002443:Ceftriaxone / Q000494:pharmacology; D002701:Chloramphenicol / Q000494:pharmacology; D024901:Drug Resistance, Multiple, Bacterial; D005516:Food Microbiology; D008087:Listeria / Q000187:drug effects* / Q000302:isolation & purification; D008826:Microbial Sensitivity Tests; D033561:Penaeidae / Q000382:microbiology*; D012475:Salmonella / Q000187:drug effects* / Q000302:isolation & purification; D012758:Shellfish / Q000382:microbiology*; D013022:South Carolina; D013752:Tetracycline / Q000494:pharmacology; D041261:Vibrio vulnificus / Q000187:drug effects* / Q000302:isolation & purification
D000900:Anti-Bacterial Agents; D002701:Chloramphenicol; D002443:Ceftriaxone; D013752:Tetracycline