Antibiotic Resistance Patterns and Serotypes of spp. Isolated at Jeollanam-do in Korea.

OBJECTIVES

Few long-term studies have been conducted on the serotype and antibiotic resistance patterns of speices (spp.) The aim of this study was to determine the serotypes and antibiotic resistance patterns of spp. isolated at Jeollanam-do in Korea from 2004 to 2014.

METHODS

A total of 276 samples were evaluated. Serotyping was carried out according to the Kauffmann-White scheme. Antibiotic susceptibility was determined using the Vitek II system with an AST-N169 card.

RESULTS

A total of 22 different serotypes were identified, and the major serotypes were Enteritidis (116 strains, 42.0%) and Typhimurium (60 strains, 21.7%). The highest resistance was observed in response to nalidixic acid (43.4%), followed by ampicillin (40.5%) and tetracycline (31.6%). Resistance to nalidixic acid was detected in 81.0% of . Enteritidis. Multidrug resistance was detected in 43.3% of spp. . Enteritidis and . Typhimurium presented the highest resistance (98.3%) and multidrug resistance rate (73.3%), respectively. The most highly observed antibiotic resistance pattern among spp. in this study was ampicillin-chloramphenicol (14 strains, 5.7%).

CONCLUSION

Overall, . Enteritidis and . Typhimurium showed higher antibiotic resistance than the other serotypes tested in this study. Our study will provide useful information for investigating the sources of infections, as well as selecting effective antibiotics for treatment.