An epizootic ofSalmonella typhimuriumvar.copenhagenin broilers and the use of cultured chicken intestinal flora for its control

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Abstract
1. An epizootic caused by Salmonella typhimurium var. Copenhagen and occurring on the farms of one company was examined with the following factors in mind: the spread of the epizootic, the infection rate of the flocks and the role of the food, hatchery and parent stock. 2. A microbiological technique was used with the aim of preventing infection on the farms. 3. The method of control was not as effective in the field as in the laboratory; the possible reasons for this are discussed.