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Table. 1.

Table. 1.

Prevalence and genotypes of ESBL-EC isolates

Source* Province Positive rate (%, N) P ESBL types (N)
Pork Seoul/Gyeonggi 18.4% (18/98) 0.003 CTX-M-55 (11), CTX-M-15 (2), CTX-M-14 (2), CTX-M-65 (2), CTX-M-27 (1)
Gangwon 7.3% (6/82) CTX-M-55 (3), CTX-M-14 (2), SHV-12 (1)
Jeolla 7.5% (13/174) 0.01§ CTX-M-55 (10), CTX-M-14 (3)
Chungcheong 5.3% (5/95) CTX-M-15 (5)
Gyeongsang 5.5% (5/91) 0.004 CTX-M-55 (3), CTX-M-14 (2)
Subtotal 8.9% (48/540) < 0.0001 CTX-M-55 (27), CTX-M-14 (9), CTX-M-15 (8), CTX-M-65 (2), CTX-M-27 (1), SHV-12 (1)
Swine Seoul/Gyeonggi 15.8% (19/120) CTX-M-55 (16), CTX-M-102 (2), CTX-M-14 (1)
Gangwon 23.8% (19/80) 0.001** CTX-M-65 (18), CTX-M-55 (1)
Jeolla 22.5% (45/200) < 0.0001†† CTX-M-14 (21), CTX-M-15 (12), CTX-M-55 (11), CTX-M-28 (1)
Chungcheong 8.8% (14/160) 0.001‡‡ CTX-M-55 (12), CTX-M-15 (1), CTX-M-14 (1)
Gyeongsang 21.5% (43/200) CTX-M-55 (21), CTX-M-14 (21), CTX-M-15 (1)
Subtotal 18.4% (140/760) 0.002§§ CTX-M-55 (61), CTX-M-14 (44), CTX-M-65 (18), CTX-M-15 (14), CTX-M-102 (2), CTX-M-28 (1)
Worker Seoul/Gyeonggi 11.5% (6/52) CTX-M-15 (3), CTX-M-55 (1), CTX-M-14 (1), CTX-M-27 (1)
Gangwon 18.8% (3/16) CTX-M-55 (2), CTX-M-65 (1)
Jeolla 9.5% (4/42) CTX-M-14 (2), CTX-M-55 (1), CTX-M-17 (1)
Chungcheong 0.0% (0/44) -
Gyeongsang 12.5% (3/24) CTX-M-15 (2), CTX-M-3 (1)
Subtotal 9.0% (16/178) 0.003∥∥ CTX-M-15 (5), CTX-M-55 (4), CTX-M-14 (3), CTX-M-3 (1), CTX-M-17 (1), CTX-M-27 (1), CTX-M-65 (1)
Environment Seoul/Gyeonggi 25.0% (6/24) CTX-M-55 (3), CTX-M-102 (2), CTX-M-69 (1)
Gangwon 15.4% (2/13) CTX-M-65 (2)
Jeolla 20.5% (8/39) CTX-M-14 (5), CTX-M-55 (2), CTX-M-15 (1)
Chungcheong 22.2% (6/27) CTX-M-15 (4), CTX-M-55 (2)
Gyeongsang 18.2% (6/33) CTX-M-14 (4), CTX-M-15 (1), CTX-M-55 (1)
Subtotal 20.6% (28/136) < 0.0001¶¶ CTX-M-14 (9), CTX-M-55 (8), CTX-M-15 (6), CTX-M-65 (2), CTX-M-102 (2), CTX-M-69 (1)
Total 14.4% (232/1,614) CTX-M-55 (100), CTX-M-14 (65), CTX-M-15 (33), CTX-M-65 (23), CTX-M-102 (4), CTX-M-27 (2),
CTX-M-3 (1), CTX-M-28 (1), CTX-M-69 (1), CTX-M-17 (1), SHV-12 (1)

*Pork samples were collected from slaughterhouses and retail stores. Worker and environment samples were collected from swine farms, slaughterhouses, and retail stores; Chi-square test was used to compare categorical variables; comparison of positive rates between pork samples from Seoul/Gyeonggi and Chungcheong, §pork samples from Seoul/Gyeonggi and Jeolla, and llpork samples from Seoul/Gyeonggi and Gyeongsang; comparison of positive rates between pork and swine samples; comparison of positive rates between **swine samples from Gangwon and Chungcheong, ††swine samples from Chungcheong and Jeolla, and ‡‡swine samples from Chungcheong and Gyeongsang; comparison of positive rates between §§swine and worker samples, llllworker and environment samples, and ¶¶environment and pork samples.

Abbreviations: ESBL, extended-spectrum-β-lactamase; ESBL-EC, Extended-spectrum-β-lactamase-producing Escherichia coli.

Ann Lab Med 2021;41:285~292

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