Pathogenesis of infection with LP VN/1203/K and LP VN/1203/E in chickens.

A<p>Number of samples positive for virus antigen as measured by immunohistochemistry. Scoring system: 1 = Antigen sparse, 2 = Antigen common, 3 = Antigen abundant.</p>B<p>Virus isolation was performed by inoculation of 3 embryonated chicken eggs per tissue sample.</p>C<p>Includes dermis of feathered skin, feather pulp and comb; for other tissues see the result section.</p>D<p>Other tissues are liver, kidney tubules, spleen, lung interstitium, connective tissues, lymphoid follicles, and salivary glands.</p>E<p>Thrombocytes.</p>F<p>Number of birds with one or more positive tissues.</p><p>*Significantly different from each other (P<0.05, two-tailed Fisher's exact test).