a1 The Division of Microbiological Reagents and Quality Control, Central Public Health Laboratory, Colindale Avenue, London NW9 5HT, UK
Clinical information was collected on 722 cases of Listeria monocytogenes infections in humans occurring in Britain between 1967 and 1985: 248 cases (34%) were associated with pregnancy (maternal, foetal, and neonatal), and comprised 9 cases (4%) of maternal bacteraemia without infection of the foetus; 42 cases (19%) of intra-uterine deaths; 118 cases (54%) of neonatal infection diagnosed within 2 days post-partum; and 50 cases (23%) of neonatal infection diagnosed as ill after 2 days post-partum. An overall mortality of 50% was recorded.
The cases unassociated with pregnancy are described elsewhere (see accompanying paper).
(Accepted November 23 1989)