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Ⅰ. 요약문
samples. Meanwhile, a total of 25 (6.1%) methicillin resistantS. aureus was detected in carcass
samples. The level of resistance in pathogenic bacteria from diseased animals was higher than
that of indicator bacteria from healthy animals, although the resistance of pathogenic bacteria
varied according to bacterial species and antimicrobials.
3. Monitoring of antimicrobial resistance in retail food and imported meats
A total of 77 E. coli, 55 S. aureus, 7 Enterococcus spp. and 9 Salmonella spp. were isolated
to investigate antimicrobial resistance of food-borne bacteria from retail meats and fishery
products that were produced in Korea. For E. coli, high resistance rate for tetracycline,
ampicillin and nalidixic acid were observed. Generally, strains from beefs had lower resistance
rate compared to those from porks and chicken meats. Resistance of S. aureus showed high
rate to penicillin, and all strains were susceptible to vancomycin, linezolid, mupirocin etc.
For Enterococcus spp., tetracycline resistance was high but its statistical meaning was not
clear because of small number of isolated strains. Seven strains of Salmonella were isolated
from chicken meats and the others from porks. They showed high resistance to nalidixic acid,
streptomycin, cephalothin and tetracycline but were susceptible to ciprofloxacin, cefoxitin,
chloramphenicol etc. Compared to strains from imported chicken meat, E. coli strains from
domestic chicken meat showed higher resistance in phenicols, quinolones and fluoroquinolones.
To investigate antimicrobial resistance of bacteria from imported meats 51 strains of
bacteria were isolated (29E. coli, 13S. aureus, 9Enterococcus spp.). ForE. coli, streptomycin,
tetracycline and ampicillin resistance was higher than those of the other antimicrobials.
Small numbers of isolates from beef and pork made it difficult to compare antimicrobial
resistances from various livestock. Resistance of S. aureus showed high rate to erythromycin
and clindamycin and penicillin resistance was decreased compared to last year and quite
lower than that of domestic strains. No strain was found that had resistance to vancomycin,
linezolid, mupirocin etc. For Enterococcus spp., resistance of tetracycline was highest except
for quinupristin/dalfopristin that was known as intrinsic resistance by Enterococcus faecalis.
And all isolated strains were susceptible to gentamicin, vancomycin, tigecycline linezolid,
chloramphenicol etc.
Key words : Livestock, animal products, food, antimicrobial resistance, antimicrobial consumption
4
samples. Meanwhile, a total of 25 (6.1%) methicillin resistantS. aureus was detected in carcass
samples. The level of resistance in pathogenic bacteria from diseased animals was higher than
that of indicator bacteria from healthy animals, although the resistance of pathogenic bacteria
varied according to bacterial species and antimicrobials.
3. Monitoring of antimicrobial resistance in retail food and imported meats
A total of 77 E. coli, 55 S. aureus, 7 Enterococcus spp. and 9 Salmonella spp. were isolated
to investigate antimicrobial resistance of food-borne bacteria from retail meats and fishery
products that were produced in Korea. For E. coli, high resistance rate for tetracycline,
ampicillin and nalidixic acid were observed. Generally, strains from beefs had lower resistance
rate compared to those from porks and chicken meats. Resistance of S. aureus showed high
rate to penicillin, and all strains were susceptible to vancomycin, linezolid, mupirocin etc.
For Enterococcus spp., tetracycline resistance was high but its statistical meaning was not
clear because of small number of isolated strains. Seven strains of Salmonella were isolated
from chicken meats and the others from porks. They showed high resistance to nalidixic acid,
streptomycin, cephalothin and tetracycline but were susceptible to ciprofloxacin, cefoxitin,
chloramphenicol etc. Compared to strains from imported chicken meat, E. coli strains from
domestic chicken meat showed higher resistance in phenicols, quinolones and fluoroquinolones.
To investigate antimicrobial resistance of bacteria from imported meats 51 strains of
bacteria were isolated (29E. coli, 13S. aureus, 9Enterococcus spp.). ForE. coli, streptomycin,
tetracycline and ampicillin resistance was higher than those of the other antimicrobials.
Small numbers of isolates from beef and pork made it difficult to compare antimicrobial
resistances from various livestock. Resistance of S. aureus showed high rate to erythromycin
and clindamycin and penicillin resistance was decreased compared to last year and quite
lower than that of domestic strains. No strain was found that had resistance to vancomycin,
linezolid, mupirocin etc. For Enterococcus spp., resistance of tetracycline was highest except
for quinupristin/dalfopristin that was known as intrinsic resistance by Enterococcus faecalis.
And all isolated strains were susceptible to gentamicin, vancomycin, tigecycline linezolid,
chloramphenicol etc.
Key words : Livestock, animal products, food, antimicrobial resistance, antimicrobial consumption
4
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