Understanding Blood-Borne Diseases and Mange Mites
Dr. Keith A. Hnilica DVM, MS, MBA, DACVD
6 min read
When it comes to canine health, few conditions are as serious as blood-borne diseases and contagious mange. Both can cause significant illness if left untreated, but with prompt veterinary diagnosis and appropriate treatment, many affected dogs recover well.
Blood-borne diseases are commonly transmitted by parasites such as ticks and mosquitoes. Depending on where you live, these diseases may include heartworm disease, ehrlichiosis, anaplasmosis, and babesiosis. They can affect the blood, immune system, heart, and other organs, leading to symptoms such as lethargy, fever, weight loss, anemia, and reduced exercise tolerance. Early diagnosis and treatment are critical for achieving the best possible outcome.
Because many of these illnesses develop gradually, dogs may appear healthy during the early stages of infection. Regular veterinary examinations, parasite prevention, and recommended screening tests play an important role in detecting disease before severe complications develop.
Sarcoptic mange, caused by the mite Sarcoptes scabiei, is a highly contagious skin disease that leads to intense itching, hair loss, skin inflammation, and crusting. Dogs typically become infected through close contact with other affected animals or contaminated environments, and wildlife such as foxes or coyotes can serve as reservoirs in some regions.
Sarcoptic mange is also considered zoonotic, meaning the mites can temporarily transfer to humans and cause itchy skin irritation. Fortunately, the mites cannot complete their life cycle on people, and human symptoms usually resolve once the affected dog receives treatment.
Advances in veterinary medicine have greatly improved the treatment of many parasitic diseases. Modern isoxazoline medications, along with other veterinarian-prescribed antiparasitic therapies, have proven highly effective against several species of mites and ticks while also providing ongoing parasite protection for many dogs. Treatment recommendations vary depending on the specific disease, the dog's health status, and local parasite risks.
Blood-borne diseases often require additional therapies, such as antibiotics, antiparasitic medications, supportive care, or, in the case of heartworm disease, a carefully supervised treatment protocol. Your veterinarian will recommend the most appropriate plan based on your dog's diagnosis.
Online information about parasite medications can sometimes emphasize rare adverse events without providing appropriate context. Like all medications, parasite preventives and treatments can have potential side effects, but extensive research and clinical experience have demonstrated that these products are generally safe and highly effective when used according to veterinary guidance. For most dogs, the risks posed by untreated parasite-borne diseases are far greater than the risks associated with recommended preventive care.
Parasites don't have to define your dog's future. With year-round parasite prevention, routine veterinary care, and prompt treatment when illness occurs, many blood-borne diseases and parasitic skin conditions can be prevented or successfully managed. If your dog develops unusual scratching, hair loss, fever, lethargy, or other concerning symptoms, schedule a veterinary examination as soon as possible. Early intervention offers the best chance for a full recovery and a healthy, active life.
