TABLE 2.

Score of IDV attachment in the respiratory tract of bovine, sheep, goat, horse, and pig.

	Nasal turbinate	Submucosal glands	Pharynx	Trachea	Lung
Bovine	+++	+++	+++	++	++
Sheep	+	+++	+++	−	−
Goat	−	+++	+++	−	−
Horse	−	++	−	−	−
Swine	−	−	−	−	−

The mean abundance of cells to which virus attached was scored according to the methods published by van Riel et al. (2007) and it was applied as follow: − no attachment; + attachment to few cells, ++ attachment to a moderate number of cells; +++ attachment to many cells.