Yes, fleas can transmit several diseases to dogs. One of the most common is the transmission of the bacterium *Bartonella henselae*, which causes cat scratch fever, and can be passed to dogs through flea bites. Additionally, fleas can also transmit tapeworms, which can cause gastrointestinal issues in dogs. Flea bites can lead to flea allergy dermatitis, causing itching and skin infections. It's important to keep your dog on a regular flea prevention regimen to minimize these risks. Regular veterinary check-ups can also help in early detection and treatment of any flea-related diseases.

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Topics covered in this question:

Dog Health Dog Care Parasites Fleas Disease Transmission