Which type of fly is known to transmit diseases in cattle?

The Horse Fly is recognized for its role in transmitting diseases in cattle, making it the correct response. This type of fly, known for its large size and painful bite, can act as a vector for various pathogens that affect cattle health. Horse Flies are often found near water sources where cattle congregate, increasing the likelihood of disease transmission. They can spread blood-borne pathogens such as the causative agents of anaplasmosis and equine infectious anemia through their biting behavior, as they draw blood from the animals.

In considering the other types of flies listed, while Stable Flies can also affect cattle and are known for irritating bites, their primary impact is more related to comfort and weight loss rather than significant disease transmission. Sand Flies are more associated with transmitting diseases in mammals, including humans, but they are not notable pests for cattle or significant disease vectors in this particular context. Maggot Flies typically deal with decaying organic matter and are not directly related to the transmission of diseases in cattle. Thus, the distinctive characteristics and behavior of Horse Flies firmly establish them as significant carriers of pathogens that affect cattle health.