Table 3.

ESBL prevalence amongst study isolates

Isolate	Not confirmed ESBL-positivea	ESBL prevalence
		Confirmed ESBL-positive	% of overall prevalence
Citrobacter spp.	4	6 (60 %)	11.5
Enterobacter spp.	3	5 (62.5 %)	9.6
Escherichia coli	51	18 (26.1 %)	34.6
Klebsiella spp.	22	22 (50.0 %)	42.3
Proteus spp.	5	1 (16.7 %)	1.9
Total	85	52 (37.9 %)	100

ESBL prevalence was determined using MAST D52C combined discs by the Kirby-Bauer method of antibiotic susceptibility testing

^aThe column for “not confirmed ESBL-positive” includes isolates that failed screening tests as well as those isolates that may have passed the screening test(s) but failed confirmatory tests