The effect of mastitis on milk progesterone concentration in dairy cows
Kassa, T.; Ahlin, K.A.; Larsson, K.; Kindahl, H.
Nordisk Veterinaermedicin 38(6): 352-359
1986
ISSN/ISBN: 0029-1579 PMID: 3550688 Document Number: 272239
A within cow comparison was made between milk progesterone levels in healthy and mastitic quarters. Material was collected from cows with mastitis induced by bacterial inoculation, or by inoculation with bacterial endotoxin. Furthermore material from cows with spontaneous subclinical mastitis was used. Milk progesterone levels were lowered due to mastitis. However, the decrease was not large enough to cause misinterpretation of where in the oestrous cycle (luteal phase or non-luteal phase) the samples were taken.