Fig. 3. Comparison of European swine influenza virus titres recovered from ferret tissues. Ferrets were inoculated intranasally with 1 ml 10⁶ TCID₅₀ (0.5 ml per nostril) with H1N2, H1avN2hu, H3N2 or H1pdmN2sw and tissues were collected at day 5 p.i. Titres are expressed as log₁₀TCID₅₀ (g tissue)⁻¹. Each bar represents one ferret. Data are presented as virus titre (log₁₀TCID₅₀ g⁻¹) from the indicated tissue. Limit of detection was 10¹ TCID₅₀ g⁻¹.