TABLE 1.

Occurrence of Gram-negative Enterobacterales strains, nonfermenting organisms, and PFGE type 00531 ESBL-producing K. oxytoca isolates in environmental samples obtained during on-site inspection of risk areas

Room	Sampling point	Counts (CFU/ml or total Gram-negative bacterial count)	Microbiological differentiation	CTX-M	PFGE type 00531/ST201 K. oxytoca
Nursing care room, storage rooms	Working basin, siphon	2.1 × 105	Serratia marcescens
	Hand wash basin, siphon water	1.6 × 106	K. oxytoca	Positive	Yes
			Raoultella terrigena	Negative
			Enterobacter cloacae complex	Negative
	Hand wash basin, drainage hole cover	Scattered/swab (no CFU/ml)	E. cloacae complex	Negative
			K. pneumoniae	Negative
Staff toilet	Hand wash basin, fresh water	Not evaluable/100 ml	Gram-negative nonfermenting rods
	Hand wash basin, siphon water	1.5 × 104	P. aeruginosa, S. maltophilia
	Toilet, water	1.0	S. maltophilia
Staff room	Kitchen sink, siphon water	3.0 × 105	K. oxytoca	Positive	Yes
			P. aeruginosa	Negative
	Water reservoir tank, espresso machine	10.0 CFU/50 ml	S. maltophilia
Hygiene sluice, PNC	Hand wash basin, siphon water	1.3 × 104	P. aeruginosa, Gram-negative nonfermenting rods
Basement, laundry room	Tumble dryer, water tray	Not evaluable/50 ml	Gram-negative nonfermenting rods
	Washing machine 1, residual water, rubber mantle	3.9 × 102	K. oxytoca	Positive	Yes
	Washing machine 1, detergent compartment	Not evaluable/swab	K. oxytoca	Positive	Yes
			P. aeruginosa	Negative
	Washing machine 2, detergent compartment	Not evaluable/swab	P. aeruginosa
Laundry	Hat 1	>109	K. oxytoca	Positive	Yes
	Hat 2	>109	K. oxytoca	Positive	Yes
	Hat 3	>109	K. oxytoca	Positive	Yes
	Hat 4	>109	K. oxytoca	Positive	Yes
	Socks 1	>109	K. oxytoca	Positive	Yes
	Socks 2	>109	K. oxytoca	Positive	Yes