Fleas can transmit several diseases to dogs, including tapeworms, Bartonella (also known as cat scratch fever), and flea allergy dermatitis. Tapeworms are intestinal parasites that can be transmitted to dogs when they ingest fleas carrying tapeworm eggs. Bartonella is a bacterial infection that can cause symptoms like fever, lethargy, and swollen lymph nodes. Flea allergy dermatitis is a common allergic reaction to flea saliva, leading to intense itching and skin irritation. It's crucial to prevent fleas on your dog through regular grooming, flea prevention products, and keeping your home environment clean.

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Topics covered in this question:

Prevention Dogs Fleas Diseases Tapeworms Bartonella