Figure 1.

Viral titers of test virus samples in the Puritan transport medium including various concentrations of BXA determined in MDCK‐SIAT1 cells. (A) A schematic procedure of preparation of test virus samples and infectious virus titer testing. Test virus stocks of A/Victoria/361/2011 (H3N2) at 400 or 40 000 TCID₅₀/mL (final concentration) and 0 to 300 ng/mL of BXA (final concentration) were diluted with the Puritan transport medium and mixed, followed by the determination of infectious viral titers (log₁₀ TCID₅₀/mL) in MDCK‐SIAT1 cells. (B) Viral titers of test virus samples. Data represent the mean and standard deviation of five experiments. The virus titers with lower limit of quantification (<0.7) were set as 0.5 log₁₀ TCID₅₀/mL for the calculation of statistics. * P < .05 to the baseline by Welch's t test