A Note on the Persistence of Salmonella havana and Faecal Coliforms on a Naturally Contaminated Piggery Effluent Disposal Site

Following application of effluent from apparently healthy pigs to land, Salmonella havana was isolated from kilogram samples, irregularly and at low frequency, for eight months from soil and for nearly two from pasture. Faecal coliform organisms on the effluent disposal site decreased rapidly in numbers during the first month following application of effluent at the start of the autumn. They were then maintained at about 100 organisms/g of topsoil until late in the following spring.