FIG 6.
Pathogenicity of A(H9N2) viruses in ferrets. Three ferrets were inoculated intranasally with 106 EID50 of each virus indicated, and tissues and specimens were collected day 3 p.i. NW, nasal wash; NT, nasal turbinates; s pal, soft palate; Tr, trachea; Lg, lung; OB, olfactory bulb; BnAP, brain (pooled anterior and posterior); RS, rectal swab; Int, intestine (pooled duodenum, jejunoileum, and descending colon); Conj, surrounding conjunctiva. NW, NT, s pal, RS, Eye, and Conj are expressed as EID50/ml of sample or tissue homogenate, and Tr, Lg, OB, BnAP, and Int are expressed as EID50/g. The limit of virus detection was 101.5 EID50/g or ml.