Table 1.

Clinical characteristics of the neonates affected

Neonate	Gestational age at birth (weeks)	Deliverya	ESBL Source	ESBL resistance mechanism	Days in NICU prior to positive result	Infected/colonised	Feedingb	Status at time of discharge from NICU	Repeat ESBL testing post outbreak
1	28 + 2	CS	Rectal	Unknown	46	Colonised	EBM	Alive	Not performed
2 (index case)	34 + 5	VD	Right buttock, right eye, urine, rectal	CTX-M	8	Infectedc	EBM	Alive	Not performed
3	36 + 3	CS	Rectal	CTX-M	8	Colonised	EBM	Alive	Not performed
4	36 + 3	CS	Rectal	CTX-M	8	Colonised	EBM	Alive	Not performed
5	35 + 4	CS	Rectal	CTX-M	7	Colonised	Formula	Alive	Not performed
6	30 + 6	VD	Rectal, urine	CTX-M	6	Infectedd	EBM	Alive	ESBL positive rectal swab September 2013

^aCS: caesarean section, VD: vaginal delivery

^bEBM: expressed breast milk

^cOphthalmic, skin/soft tissue infection

^dUrosepsis