Effects of Unstable Milking Vacuum on Some Measures of Udder Health

Abstract

Two groups of 15 cows each were milked for one year with two separate vacuum systems, one of which provided stable line vacuum, while the other showed moderate vacuum fluctuation on the line. During the experimental period, no differences were observed between the two groups in the mean of the logarithms of milk leucocyte counts, number of quarters newly infected with Streptococcus agalactiae or hemolytic staphylococci, or in number of attacks of clinical mastitis. © 1968, American Dairy Science Association. All rights reserved.