Influence of prior hauling on pathogenesis of Pasteurella multocida in turkeys.

Turkeys were hauled in a truck and exposed to Pasteurella multocida in the drinking water. The clinical course of fowl cholera was modified in hauled turkeys as compared to unhauled turkeys by delaying the onset of depression and reducing the severity of the disease. In unhauled turkeys, there was a marked increase in mortality in the first experiment and a marked increase in depression at the end of the second experiment. In both experiments average cloacal temperature was higher during the first 5 days after inoculation in unhauled than in hauled turkeys. On the day after hauling, plasma corticosterone concentration decreased in both hauled and unhauled turkeys.