Table 1. Network graph and clustering details for all differentially expressed genes.

Sub-network	Cluster ID	Regulation	Number of genes
1	1	Up	257
	2	Up	143
	5	Up	24
2	3	Down	140
	4	Down	39
	6	Down	9

Network analysis identified two distinct sub-networks within the network graph each representing 3 individual gene clusters with correlated expression profiles across the time course of infestation. Up/Down indicates direction of gene expression regulation following infestation with P. ovis. Of the 621 differentially expressed genes, 617 were included in the original network graph, of these 612 were incorporated into clusters 1–6.