The immunogenic properties of Salmonella typhi-murium in sheep

Extract

Salmonellosis of adult sheep due to infection with Salmonella typhi-murium was first recognized and confirmed bacteriologically in New Zealand in March, 1949. Since then, 100 outbreaks have been identified, most of which have occurred in the North Island. These outbreaks have occurred on farms varying in topography and under different conditions of management. With one exception, none of these outbreaks, which occur mainly in late Summer and Autumn, has been associated with transit by truck or rail journeys. In 1950, consideration was given to the possibility of affording protection by prophylactic vaccination, and the purpose of this paper is to record the results of some experiments carried out at Wallaceville and in the field with that object.