How do farm personnel mechanically contribute to the indirect spread of Coryza across a farm?
Answer
Carrying the bacteria on boots, clothing, or hands between infected and non-infected areas.
Personnel act as significant vectors for the indirect transmission of *A. paragallinarum* if biosecurity measures are not rigorously enforced when moving between different housing units or flocks. Workers can mechanically transfer viable bacteria from contaminated zones to clean zones. This transfer often occurs on the surfaces of boots worn in infected pens, clothing that has come into contact with contaminated equipment or birds, or even on unwashed hands. This mechanical movement of the pathogen facilitates the introduction of Infectious Coryza into previously healthy areas of the farm, bypassing direct bird-to-bird contact initially.
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