Table 1.

Mastitis clinical scoring used for animal challenge studies.

Score	Appearance of Quarter	Score	Appearance of Milk
1	Normal	1	Normal
2	Minor changes (e.g., hardness)	2	Minor changes (e.g., a few flakes)
3	Moderate signs (e.g., heat, tenderness)	3	Moderate signs (e.g., clots, clumps)
4	Severe signs (e.g., distended and discomfort on palpation)	4	Severe Signs (e.g., changes in colour, composition)