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Table 3 Distribution of genotypes of ESBL and AmpC in 198 ESC-resistant Shigella isolates

From: Epidemic and virulence characteristic of Shigella spp. with extended-spectrum cephalosporin resistance in Xiaoshan District, Hangzhou, China

ESBL phenotypic confirmatory test (n) Genotype S. flexneri(n = 58) S. sonnei(n = 140) Total (n = 198)
ESBL or AmpC group ESBL or AmpC gene
Positive (n = 190) CTX-M-1 CTX-M-15 5 11 16
CTX-M-28 2 6 8
CTX-M-57 7 2 9
CTX-M-22 3 2 5
CTX-M-9 CTX-M-14 16 69 85
TEM TEM-1 2 4 6
OXA OXA-30 4 11 15
CTX-M-1+CTX-M-9+OXA CTX-M-15+CTX-M-14+OXA-30 1 0 1
CTX-M-1+ OXA+TEM CTX-M-22+OXA-30+TEM-1 0 2 2
CTX-M-57+ OXA-30+TEM-1 9 0 9
CTX-M-1+ TEM CTX-M-57+ TEM-1 2 0 2
CTX-M-1+ OXA CTX-M-57+ OXA-30 1 1 2
CTX-M-15+ OXA-30 2 8 10
CTX-M-9+ OXA+TEM CTX-M-14+ OXA-30+ TEM-1 1 3 4
CTX-M-9+ OXA CTX-M-14+ OXA-30 2 6 8
CTX-M-9+ TEM CTX-M-14+ TEM-1 0 6 6
Not detect the ESBL or AmpC genotype 0 2 2
Negative (n = 8) CTX-M-9+CIT CTX-M-14+CMY-2 0 1 1
CTX-M-1+DHA+OXA CTX-M-15+OXA-30+DHA-1 1 0 1
Not detect the ESBL or AmpC genotype 0 6 6