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Table 4 Distribution of resistance genes in the 94 ESBL-producer isolates

From: High prevalence and characterization of extended-spectrum ß-lactamase producing Enterobacteriaceae in Chadian hospitals

Isolates (n) Genes involved
β-lactamase genes PMQR 16S rRNA methylase
E. coli (60) CTX-M-15 (1) qnrS (2) armA (2)
CTX-M-27 (3) oqxAB (1) rmtC (2)
CTX-M-15/TEM-1 (14) qepA (1) armA/rmtC (1)
CTX-M-9/TEM-1 (2) aac (6′)-Ib-cr (24)  
CTX-M-15/OXA-1 (17) qnrS/aac (6′)-Ib-cr (4)  
CTX-M-15/CTX-M-27/TEM-1 (2) qnrS/oqxAB (1)  
CTX-M-15/TEM-1/OXA-1 (19) qnrB/oqxAB (1)  
TEM-1 (1) qnrB/oqxAB/aac (6′)-Ib-cr (2)  
OXA-1 (1) oqxAB/aac (6′)-Ib-cr (1)  
  oqxAB/qnrS (1)  
  qepA/aac (6′)-Ib-cr (1)  
K. pneumonia (20) CTX-M-15 (4) oqxAB (1) rmtB (1)
CTX-M-14 (1) qnrS/oqxAB/ (3) rmtC (1)
CTX-M-15/TEM-1 (5) qnrS/oqxAB/aac (6′)-Ib-cr (1)  
CTX-M-15/OXA-1 (2) qnrB/aac (6′)-Ib-cr (1)  
CTX-M-15/TEM-1/OXA-1 (8) qnrB/oqxAB (1)  
  qnrB/oqxAB/aac (6′)-Ib-cr (5)  
  oqxAB/aac (6′)-Ib-cr (“)  
Other species (14) CTX-M-15/TEM-1 (6) aac (6′)-Ib-cr (2) rmtB (1)
CTX-M-15/OXA-1 (3) qnrB/aac (6′)-Ib-cr (1) armA/rmtC (1)
CTX-M-15/TEM-1/OXA-1 (3) qnrD/aac (6′)-Ib-cr (2)  
OXA-1 (2)   
  1. n number, PMQR plasmid-mediated quinolone resistance