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Frozen White-Leg Shrimp (Litopenaeus vannamei) in Korean Markets as a Source of Aeromonas spp. Harboring Antibiotic and Heavy Metal Resistance Genes
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Frozen White-Leg Shrimp (Litopenaeus vannamei) in Korean Markets as a Source of Aeromonas spp. Harboring Antibiotic and Heavy Metal Resistance Genes
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Journal Article
Frozen White-Leg Shrimp (Litopenaeus vannamei) in Korean Markets as a Source of Aeromonas spp. Harboring Antibiotic and Heavy Metal Resistance Genes
2018
Overview
As the most consumed shrimp variety, white-leg shrimp (
Litopenaeus vannamei
) owns a high market demand in Korea. This study sought to screen the frozen white-leg shrimp for
Aeromonas
spp. harboring antimicrobial and heavy metal resistance characteristics. A total of 44
Aeromonas
spp. strains were isolated and tested for antibiotic susceptibility and heavy metal tolerance followed by PCR-based detection of resistance genes and integrons. It was observed that resistance to ampicillin and oxacillin was 100% among isolates. Besides, 95%, 89%, 86%, 80%, 66%, and 43% of the isolates were resistant to nalidixic acid, tetracycline, cephalothin, streptomycin, trimethoprim–sulfamethoxazole, and imipenem, respectively, and less resistance to other antibiotics was also observed. Cr resistance was the highest (91%) among five heavy metals tested, whereas 57%, 32%, 20%, and 9% of the isolates were tolerant to Cu, Pb, Cd, and Hg, respectively. The PCR assays implied the presence of
qnrB, qnrS, tetA, tetE, aac(6
′
)-Ib,
and
aphAI-IAB,
and
intI1
genes among 80%, 77%, 18%, 30%, 9%, 0.25%, and 82% of the isolates, respectively. There were 35 (80%) integron 1-positive isolates harboring
qacE2, dfrA1, orfC, orfD, aadB, catB3, oxa-10,
and
aadA1
genes in varying combinations. In addition, heavy metal resistance genes,
CopA
,
merA
, and
CzcA
were positive in 9%, 7%, and 27% of the isolates, respectively. According to these outcomes, the frozen white-leg shrimp in Korean markets can be suggested as a source of multidrug and heavy metal-resistant
Aeromonas
spp. that carries genetic determinants.
Publisher
Mary Ann Liebert, Inc., publishers,SAGE Publications,Mary Ann Liebert, Inc
Subject
/ Aeromonas - isolation & purification
/ Ampicillin Resistance - drug effects
/ Ampicillin Resistance - genetics
/ Animals
/ Anti-Bacterial Agents - pharmacology
/ Bacteria
/ Cadmium
/ Chromium
/ Copper
/ Drug Resistance, Bacterial - genetics
/ Farming
/ Fish
/ Genes
/ Imipenem
/ Lead
/ Markets
/ Metals
/ Metals, Heavy - pharmacology
/ Penicillin Resistance - genetics
/ Studies
