“…Another lipid component which has received attention in its relationship to mastitis is /?-carotene. It was recognized by many workers that some milks left a yellow stain on milk sediment discs, which was ultimately found to be related to mastitis (Cole, MacKay & Barnum, 1961;Kernohan, 1977) and subsequently identified as /?-carotene (Caruolo & Mochrie, 1967). Kernohan (1977) found that normal milks had /^-carotene levels of 13-14-3/^g/g fat while the levels in mastitic milk were 2-6-254fig/g fat.…”