Identification of a major Listeria monocytogenes outbreak clone linked to soft cheese in Northern Italy – 2009-2011

Table 1 Mean annual listeriosis incidence (cases/100,000 inhabitants) in Lombardy by province^a for ST38 (n = 43), VT80 (n = 12) and VT104 (n = 31) over the period 2006–2014

ST/VT	BG	BS	CO	CR	LC	LO	MB	MN	MI	PV	SO	VA	Lombardy
ST/VT	(1.02)	(0.52)	(0.44)	(0.85)	(1.00)	(0.71)	(0.55)	(0.22)	(0.70)	(0.44)	(1.10)	(0.50)	(0.56)
ST38	0.19	0.02	0.02	0.03	0	0.15	0.04	0	0.04	0.04	0	0.03	0.05
VT80	0.05	0	0.02	0	0	0	0.01	0	0.01	0.04	0	0.03	0.02
VT104	0.14	0.02	0	0.03	0	0.15	0.03	0	0.03	0	0	0	0.03

In brackets the mean incidence for all listeriosis cases (n = 306)Values in bold are the provincial incidences above the mean annual regional incidence
^aBG – Bergamo, BS – Brescia, CO – Como, CR – Cremona, LC – Lecco, LO – Lodi, MB – Monza Brianza, MI – Milan, MN – Mantova, PV – Pavia, SO – Sondrio, VA – Varese

ISSN: 1471-2334