Dog Diseases number 
in the scores, just 
as in humans. 
But, veterinarians tend 
to see some much more than others. 
Sadly, a great deal 
of grief 
could be avoided if more 
dog owners were careful to see that their pets are immunized regularly against preventable dog diseases.
While experts, as usual, may differ, what are the top ten dog 
diseases? Heres a list (not necessarily 
in order 
of seriousness) with a brief explanation of each disease:
Distemper: Of all the dog diseases, the American Veterinary Medical Association considers the distemper virus to be the worst canine disease threat to dogs world wide. Distemper is 
fatal in 80% of puppies 
and 50% of adults. All dogs are extremely vulnerable, 
and should be vaccinated, with subsequent boosters in keeping the recommendation of a Veterinarian.
Parvovirus (Parvo): Parvovirus is a worldwide dog disease. It is extremely contagious, especially among puppies, 
and can overwhelm a dog leading to death within 
48 to 72 hours after exposure. Symptoms include depression, 
loss of 
appetite, vomiting 
and severe diarrhea. Parvo vaccination is essential with booster shots as recommended.
Rabies: 
Rabies is a virus and becomes fatal when symptoms appear. Because rabies can be fatal to humans and other mammals, state and local laws uniformly require rabies vaccination, many mandating booster shots yearly.
Kennel Cough: This is a respiratory disease especially prevalent in kennels and shelters. 
There are a variety of virus strains, 
including Bortadella. Symptoms can include a 
dry hacking cough along with inflammation of the larynx, bronchial tubes and trachea. Vaccination, as often as every six months is recommended.
Leptospirosis: Symptoms of Leptospirosis include lethargy, 
kidney inflammation, low-grade fever, vomiting, reddening of the mucous membranes and conjunctiva, and blood clotting abnormalities. Since 
it is a bacterial 
disease, also 
found in 
humans, it is treated with antibiotics. Veterinarians are often 
reluctant to innoculate against this dog disease, since there is questionable effectiveness, and puppies can have adverse reactions.
Infectious canine hepatitis: While this dog disease often manifests itself with 
mild symptoms such as a slight fever or slight lethargy, it can, in some instances become fatal. Recovery is 
usually rapid. Vaccination is recommended.
Lyme 
Disease: Symptoms of Lyme Disease in dogs will include lethargy, joint 
pain, lack of appetite, lymph node enlargement, and fever. Lyme Disease is bacterial and is 
spread by ticks. Treatment is with tetracycline, 
an antibiotic. The 
available vaccine is not generally recommended.
Coronavirus: Diarrhea and vomiting are symptomatic of this dog disease so it can be confused with parvovirus. Other 
indications are loss of appetite, smelly diarrhea, lethargy and dehydration. Replacement of lost fluids and control of vomiting and diarrhea are the recommended treatments. A vaccine is not generally recommended.
Obesity: Just as in humans, this dog disease is a serious medical problem. Frequently, obese humans own obese dogs. Obviously, 
limiting food intake, withholding human food and enough exercise will contribute to a dogs longer life.
Heartworm: Heartworms are parasites that grow and multiply, infesting the chambers in the heart, arteries in the 
lungs. Symptoms appear gradually, usually manifested in easy tiring, lethargy and a soft 
cough. If not treated, it eventually 
brings on death by congestive heart failure in a once active animal. Prevention with products such as HartGard is recommended. 
Your veterinarian should give you a certificate showing your pets immunization against the common dog diseases. Ask for a wallet sized card which you can carry with you.
Robert G. Knechtel maintains several websites, including 
http://www.petmedshop.com and 
http://www.go60.com.