Table 2.

Epidermal changes and their severity at 3 and 24 hpi

Time	Epidermal pathology	Severity
		Mild	Moderate	Severe
3 hpi	Pustule formation	1 case	2 cases	0 cases
	Loss of architecture	6 cases	1 case	0 cases
	Loss of basement membrane	1 case	1 case	7 cases
24 hpi	Pustule formation	0 cases	2 cases	7 cases
	Loss of architecture	1 case	1 case	7 cases
	Loss of basement membrane	1 case	3 cases	3 cases

Results of epidermal changes of 9 sheep at 3 and 24 hours post-infestation (hpi) with P. ovis. The severity of epidermal changes was classified as mild (< 1/3 of the epidermis affected), moderate (1/3-2/3 of the epidermis affected) and severe (> 2/3 of the epidermis affected).