Grommers F J, van de Geer D
Tijdschr Diergeneeskd. 1979 Dec 15;104(24):962-5.
On four farms taking part in a mastitis prevention programme, milking primiparous animals first failed to result in a significant decrease of the level of udder infection during the first half of lactation. This result may nevertheless be regarded as positive, as there was a rise in infection level among the older animals of the experimental group and a decline in the controls at the same time.
在参与一项乳腺炎预防计划的四个农场中，先对初产动物进行挤奶，在泌乳期的前半段期间，并未显著降低乳房感染水平。然而，这一结果仍可被视为积极的，因为在同一时期，实验组中年龄较大动物的感染水平有所上升，而对照组的感染水平则有所下降。
