Table 3. Risk perspective for listeriosis in England and Wales, 1967–2004.

Years	Cases per year	Percentage		Outbreaks	Reference
		Pregnancy associated	<60 y of age (bacteremia)
1967–1985	<75–136	33	31 (16)	Some clusters (foodborne?)	(4)
1987–1989	237–278	40	–	50% in 1 outbreak (pâté)	(21)
1990–2000	87–128	19	67 (49)	Limited clusters	This study
2001–2004	136–237	11	73 (58)	Largely sporadic, some clusters	This study