Could a cage used for transporting a bird from a live bird market introduce a virus into a poultry flock?

The correct response indicates that the cage is indeed a potential source of contamination. When transporting birds, particularly from live bird markets where multiple species may interact, there is a risk of virus transmission. The virus can survive on surfaces, including those of a cage, for varying periods depending on factors such as temperature and humidity.

Cages can become contaminated through several means: contact with infected birds, exposure to their droppings, or even contact with contaminated feed or water. Therefore, it is critical to consider that any equipment used in transporting birds has the potential to harbor pathogens that could spread to a domestic poultry flock.

The scenario does not limit the risk only to prolonged contact or the presence of visible fecal matter, as viruses can be present in low quantities or remain on surfaces even if not immediately apparent. Thus, proper sanitation and biosecurity measures should always be implemented to mitigate this risk when moving birds between locations.