Epidemiology and Molecular Typing of Pregnancy-Associated Listeriosis Cases in Lombardy, Italy, over a 10-Year Period (2005–2014)

Table 2

Serotyping and molecular subtyping results for the 29 pregnancy-related isolates under study (2005–2014, Lombardy, Italy).

Isolate	Year	Source	Serotype	PFGE			VT	EC
				Cluster	Cluster	p/tc°
LMO 150	2010	Foetus, intestinal content	4b	B	2	4/27	87
LMO 202	2011	Mother, blood	4b				20	I
LMO 5	2005	Mother, blood	4b	C			20	I
LMO 215	2012	Foetus, exudate	4b				20	I
LMO 305	2014	Foetus, blood	4b	—	3	2/9	20	I
LMO 292	2014	Foetus, blood	4b	—			20	I
LMO 143	2010	Mother, blood	4b	G	5	2/15	21	IV
LMO 206	2011	Foetus, blood	4b				21	IV
LMO 13	2006	Foetus, pharynx	4b	—	6	4/5	76
LMO 38	2007	Foetus	4b	F			76
LMO 131	2010	Mother, blood	4b				101
LMO 149	2010	Foetus, pharynx	4b				19	II
LMO 63	2008	Foetus, pharynx	1/2a	—	8	1/12	74
LMO 42	2008	Placenta	1/2a	—	9	5/30	100
LMO 217	2012	Placenta	1/2a	—			59	V
LMO 19	2007	Foetus, gastric aspirate	1/2a	A			59	V
LMO 225	2012	Foetus, blood	1/2a				59	V
LMO 248	2013	Mother, blood	1/2a				59	V
LMO 108	2009	Foetus, blood	1/2a	—			75
LMO 230	2012	Placenta	1/2a	—	10	1/10	56	VII
LMO 141	2010	Placenta	1/2a	—	11	3/47	80
LMO 171	2011	Foetus, blood	1/2a	—			104
LMO 207	2012	Foetus, blood	1/2a	—			80
LMO 208	2011	Foetus, blood	1/2a	D	New profile	4/18	45
LMO 262	2013	Placenta	1/2a				45
LMO 251	2013	Foetus, skin	1/2a	E			45
LMO 272	2013	Foetus, skin	1/2a				45
LMO 144	2010	Foetus, blood	1/2b	—			102
LMO 146	2010	Mother, blood	4b	—			103

VT: virulence type; EC: Epidemic Clone.
clusters obtained when considering all listeriosis cases between 2005 and 2014 (pregnancy-related and non-pregnancy-related) numbered as in Mammina et al., 2013 [18].
°p/tc: number of pregnancy-related cases/total cases.
: cerebrospinal fluid.
: Unclustered.