Prevention of Clostridium difficilespore formation by sub-inhibitory concentrations of tigecycline and piperacillin/tazobactam

Table 1 Characteristics of the selected strains

Strain number	PCR ribotype^a	TRST^b	tcdC ^c	Binary toxin^d
ATCC 9689	001	001	-	-
630	012	012	-	-
VPI 10463 (ATCC 43255)	037	058	-	-
CD274	027	027	+	+
CD385	018	019	-	+
CD386	027	027	+	+
CD390	027	027	+	+
CD392	014	014	-	-
CD398	018	019	-	+
CD400	014	065	-	-

^aRibotypes were attributed according to reference strains, except ribotype 018 that was assigned arbitrarily according to our internal database.
^bType numbers correspond to those published by Zaiss et al.,[24].
^cPresence (+) or absence (−) of the characteristic 18-bp deletion, and 1-bp deletion at nucleotide 117.
^dPresence (+) or absence (−) of the binary toxin genes cdtA and cdtB.

ISSN: 1471-2334