Читать книгу Infectious Disease Management in Animal Shelters - Группа авторов - Страница 146

The gross findings of parvoviral disease, although caused by a similar virus, manifest somewhat differently in the dog and cat. It would be unlikely that a puppy or adult dog would die suddenly of parvovirus in the absence of dehydration, diarrhea, and other well‐documented clinical signs. On the other hand, kittens can die per‐acutely of panleukopenia, with no preceding signs noted. On necropsy, dogs commonly have segmental to diffuse sub‐serosal hemorrhage (reddening) that predominantly affects the small intestine (See Figure 5.8).

The small intestine can be flaccid and/or dilated. There will be scant ingesta within the intestinal system and no formed feces within the colon. On section of the small intestine, the mucosa is segmentally to multifocally discolored tan to dark red (necrosis, congestion, hemorrhage). Peyer's patches, which are more concentrated in the distal small intestine and ileum, can be dark red (lympholysis).

In cats, the findings can be similar but are usually subtle. The small intestine is flaccid or dilated, but not always reddened, and the GI contents, although typically watery or scarce, do not always contain blood. In both dogs and cats, the mesenteric lymph nodes are enlarged, congested and wet (edematous). Because the effect of panleukopenia on bone marrow and primary lymphoid tissues is quite predictable in the feline form of the disease, it is a good idea to include these tissues when performing a necropsy on either a dog or a cat.

Figure 5.8 Canine parvovirus (CPV). The intestines are segmentally thick, edematous, and hemorrhagic, and the mucosal surface (pictured here) is dull and felt‐like.