The carriage of Corynebacterium suis in male pigs.

This investigation was designed to determine the prevalence of Corynebacterium suis in the preputial diverticulum of pigs of various age groups, located in different parts of the U.K., and to demonstrate whether the organism is transmissible between male pigs. C. suis was isolated from almost 90% of 224 adult males, distributed among 25 pig units in widely separated regions of the country and in 96% of 66 pigs aged 5-6 months originating from six different herds in East Anglia. The rate of isolation of C. suis from younger pigs depended, at least in part, on the system of husbandry practised. Thus, in one herd, A, in which young pigs were maintained in comparative isolation, none of 26 pigs aged 5-8 weeks harboured C. suis; however, in the same herd, the organism was isolated from 77% of 64 pigs aged 9-15 weeks which were in close contact with male pigs aged up to 6 months. In another herd, B, in which individual litters were housed in the same pen from birth to 5 months of age, C. suis was isolated once from only one of 36 pigs in the age range 5-17 weeks, sampled on two occasions, with an interval of 5 weeks between each sampling.(ABSTRACT TRUNCATED AT 250 WORDS)