a1 Pathology Department, Royal Halifax Infirmary, Free School Lane, Halifax, West Yorkshire HX1 2YP
a2 Department of Community Medicine, Calderdale Health Authority, Free School Lane, Halifax, West Yorkshire HX1 2YP
An outbreak of infection due to Streptococcus zooepidemicus (Lancefield Group C) is described. At least 11 patients were affected and the infection was responsible for, or contributed to, the deaths of seven of these. Clinical features included septicaemia, meningitis and endocarditis. The source of infection was unpasteurized milk from a dairy herd with mild intermittent mastitis.
(Accepted February 22 1988)