Abstract
SUMMARY Turkeys naturally infected with Arizona hinshawii 7:1,7,8 and Salmonella senftenberg were studied during the growing period. Birds were then selected from this flock for egg-transmission studies. A. hinshawii 7:1,7,8 infection was mainly systemic in nature in growing birds. The serological response to A. hinshawii 7:1,7,8 was highest at 4 weeks of age and at the time the birds were coming into production. Egg transmission of A. hinshawii 7:1,7,8 was inferred to be transovarian. Transmission rate was higher in birds (group 1) which had been serologically and culturally negative during the growing period than in birds (group 2) which had been serologically and/or culturally positive. The serological response of birds during production was lower in the first group than in the second group. The most effective method of detecting turkey breeding flocks infected with A. hinshawii 7:1,7,8 seemed to be cultural examination of hatch debris and dead poults during the brooding period.
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