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"Parvo" is an extremely contagious viral disease of dogs that causes severe vomiting, diarrhea, and even death. It occurs almost exclusively in puppies less than 1 year old, though parvo affects dogs of any age.

What is pannus?
Pannus or chronic superficial keratitis is an immune-mediated condition affecting the cornea or clear part of the eye. It occurs primarily in middle-aged German Shepherd Dogs, but other breeds may also be affected.

What is "parvo"?
Canine parvovirus (CPV) infection is a relatively new disease that appeared for the first time in dogs in 1978. Because of the severity of the disease and its rapid spread through the canine population, CPV has aroused a great deal of public interest. The virus that causes this disease is very similar to feline panleukopenia (feline distemper) and the two diseases are almost identical. Therefore, it has been speculated that the canine virus is a mutation of the feline virus. However, that has never been scientifically proven.