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Attachment of low pathogenic avian influenza viruses of subtypes H1 to H16 to the colon and trachea of individual birds of six Eurasian duck species and chickena
The mean abundance of cells to which virus attached was investigated based on tissues from a total of 19 birds and was scored as follows: 1, negative (no attachment); 2, scarce (<10% cells positive); 3, moderate (10 to 50% cells positive); 4, abundant (>50% cells positive). MAD, median of absolute deviation.
