TABLE 1.

Characteristics of nonduplicate 149 ESBL producers obtained from 122 participants

Species	No. of isolates in each of the following CTX-M groups:
	CTX-M-1	CTX-M-2	CTX-M-8	CTX-M-9	Non-CTX-Ma	Total
E. coli	30	19	7b	82	7	145
K. pneumoniae		2c			1	3
A. hydrophila				1		1
Total	30	21	7	83	8	149

^aIsolates harboring the bla_SHV gene.

^bOne of seven isolates harbored both the bla_CTX-M-8 and bla_TEM-52 genes.

^cThese isolates harbored both the bla_CTX-M-2 and bla_SHV-1 genes.