Ceftazidime-Avibactam plus aztreonam synergistic combination tested against carbapenem-resistant Enterobacterales characterized phenotypically and genotypically: a glimmer of hope

Table 3 Genotypic detection of carbapenemase genes among carbapenem-resistant Klebsiella species and E. coli isolates

Carbapenemase genes	Klebsiella species (n = 80)		E. coli (n = 20)		χ²	P
Carbapenemase genes	No	%	No	%	χ²	P
bla_KPC	9	11.25%	17	85%	45.231^*	< 0.001^*
bla_GES	56	70%	18	90%	3.326	0.068
bla_NDM	73	91.25%	19	95%	0.306	^FEp = 1.000
bla_IMP	0	0.0%	0	0.0%	–	–
bla_VIM	55	68.75%	20	100%	8.333^*	0.004^*
bla_OXA-48	58	72.5%	19	95%	4.574^*	0.038^*

ISSN: 1476-0711