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Volume 14, Number 1—January 2008

Dispatch

Avian Influenza Virus (H5N1) Replication in Feathers of Domestic Waterfowl

Yu Yamamoto*Comments to Author , Kikuyasu Nakamura*, Masatoshi Okamatsu*, Manabu Yamada*, and Masaji Mase*
Author affiliations: *National Institute of Animal Health, Tsukuba, Ibaraki, Japan;

Main Article

Table

Histopathology of feathers and virus isolation from the skin in domestic ducks and geese inoculated with 2 different avian influenza (H5N1) genotypes*

PID
A/chicken/Yamaguchi/7/2004
A/chicken/Miyazaki/K11/2007
Duck
Goose
Duck
Goose
3 +/+† (3.5)‡ –/– (–) +/+ (4.5) +/+ (4.4)
5 +/+ (–) +/+ (4.5) –/+ (3.8) +/+ (2.5)

*PID, postinoculation day.
†Epidermal necrosis of feathers/detected viral antigens; +, positive; –, negative.
‡Viral titer of the skin expressed as log10 egg infectious dose (EID50)/g; –, negative (<102 EID50/g).

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