Replication of H9N2 viruses in tissues of mice.

a<p>Mice (n = 3) were inoculated i.n., and tissues were taken on days 5 p.i. Clarified homogenates of tissues were titrated for virus infectivity in eggs from initial dilutions of 1∶10. Mean viral titers are expressed as log₁₀ EID₅₀ per 10 milligram wet tissues.</p>b<p>Average virus titers for each tissue (the number of positives/total number tested for each virus).</p>c<p><, no virus detectable at dilution of ≥10⁻¹.