Abstract
Two strains of feline calicivirus, one reportedly pneumotrophic (FPV 255) and the other associated with a limping syndrome (2280) were compared with respect to the signs induced in kittens after oronasal exposure. Neither strain induced severe upper respiratory symptoms, and both caused oral ulcers and lameness. However oral ulcers were more prevalent, and lameness and depression were more pronounced in the kittens which received strain 2280. Kittens which exhibited lameness also had elevated blood levels of alpha 1-acid glycoprotein. A decline in lymphocyte count was noted only in kittens which received strain 2280. These data demonstrate that despite reported antigenic and genetic differences between these strains, no distinct differences in pathogenicity could be determined.
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