Table 4A.

The estimated cost of a case of ischaemic teat necrosis (ITN).

Component	Breakdown	Cost	Source
Milk yield/lactation	8,000/litre	-	Dataset (24)
Milk yield /quarter/ day	6.15 litres	-	Dataset
Price per litre of milk	£0.28		(24, 25)
Length of lactation	325 days	-	Dataset
ITN lesion onset	25 DIM	-	Dataset

Breakdown of the components and assumptions used for the calculations. The source or reference used to devise these calculations is also indicated in the table. These key figures were used to calculate the costs in Tables 4B–D.

DIM, days in milk; £, pounds Sterling.