TABLE 3.

Virus titers in organs of infected ferrets^a

Virus (type)	Day	Virus titer of ferrets infected in:
		Nasal turbinates	Trachea	Lung
A/Sapporo/114/2013 (H275Y mutant)	3	6.0 ± 1.6	4.1	2.0
	6	2.2, 5.0	2.5	—b
A/Shizuoka-c/99/2013 (wild type)	3	6.7 ± 0.9	2.7, 3.4	3.2 ± 0.3
	6	2.0 ± 0.2	—	—

^aFerrets were intranasally infected with 0.5 ml of 10⁶ PFU virus. Three ferrets from each group were euthanized on days 3 and 6 postinfection for viral titration. Virus replication in the liver, duodenum, spleen, and kidneys was also examined; no virus was detected in these organs. The values are presented as the mean log₁₀ PFU ± SD/g or as individual titers when virus was not recovered from all three ferrets.

^b—, virus not detected.