Types
Many dog owners believe that fleas just cause a bit of itching but that is not the case. There are many diseases that a dog can actually suffer from that are directly related to having fleas. Diseases that your dog can contract from fleas include internal parasites, tularemia, flea allergy dermatitis, and haemobartonellosis. While not all dogs will get those diseases from fleas, many will suffer from flea infestations.
Features
Flea-borne diseases cause different but sometimes overlapping symptoms. Flea allergy dermatitis is perhaps the most common disease that affects dogs; it is an allergic reaction to the saliva of the flea results in extreme itchiness, swelling, and respiratory distress.