Which transmission route between farms is illustrated by the example of contaminated footwear?

Which transmission route between farms is illustrated by the example of contaminated footwear?

• A. Contaminated boots
• B. Direct bird-to-bird contact
• C. Water supply
• D. Insects

Answer: (A)

Contaminated footwear shows transmission via fomites, an indirect route between farms. When boots or shoes pick up infectious material from an infected site, they can deposit it on a clean farm as workers move between locations, introducing the pathogen without any direct contact between birds. This is a mechanical transmission by an inanimate object, not a direct animal-to-animal spread. Other options describe different mechanisms—direct bird-to-bird contact needs animals touching each other, contaminated water would spread through the water supply, and insects would act as vectors. The footwear example specifically demonstrates the fomite route, making it the best fit. Biosecurity measures like dedicated farm footwear, boot cleaning and disinfection, and restricted access help prevent this kind of spread.

Contaminated footwear shows transmission via fomites, an indirect route between farms. When boots or shoes pick up infectious material from an infected site, they can deposit it on a clean farm as workers move between locations, introducing the pathogen without any direct contact between birds. This is a mechanical transmission by an inanimate object, not a direct animal-to-animal spread. Other options describe different mechanisms—direct bird-to-bird contact needs animals touching each other, contaminated water would spread through the water supply, and insects would act as vectors. The footwear example specifically demonstrates the fomite route, making it the best fit. Biosecurity measures like dedicated farm footwear, boot cleaning and disinfection, and restricted access help prevent this kind of spread.