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Alteration of lectin labeling of ET on day 3 after i.n. challenge of influenza A virus (magnification, ×160). (a) Weak labeling of SNA at the pharyngeal portion (arrows); (b) weak positive labeling of SWGA at the tympanic portion (arrows); (c) weak and focal labeling of BSL II at the tympanic portion (arrows); (d) weak labeling of PNA at the pharyngeal portion (arrows).
