Virtually all Holstein dairy cows have the first wave of follicle growth starting two weeks postpartum, with about 30% of these cows ovulating within 21 days in milk. This 3-page fact sheet presents the results of a recent paper that evaluated the individual and combined effects of anovulation and subclinical endometritis on reproductive performance of dairy cows. Written by Klibs N. Galvão and Achilles Vieira-Neto, and published by the UF Department of Veterinary Medicine-Large Animal Clinical Sciences, May 2014.
http://edis.ifas.ufl.edu/vm222
Tag: Achilles Vieira Neto
Comparing the Urine Ketone Strip Test and Handheld Ketone Meter to Diagnose Ketosis in Early Lactation Dairy Cows (VM186)
Ketosis is a common metabolic disease in fresh dairy cows. Clinical and subclinical ketosis (SCK) can cause reduced milk yield, decreased milk protein, reduced reproductive capacity, and increased risk of displaced abomasum. Usually, diagnosing ketosis is performed by measuring acetoacetate or BHBA levels in the blood, urine, or milk samples. Measuring BHBA in serum or plasma is considered the gold standard diagnostic test for subclinical ketosis, because this method has stability, but the price for ketone strips is approximately $0.08/strip while the price for the the electronic BHBA measuring system is approximately $1.00. UF/IFAS researchers conducted a study to compare the two, using 72 Holstein cows between 14–40 days in milk from three dairy farms in north-central Florida with 450–800 lactating dairy cows. The key finding for this experiment is that no difference exists in BHBA concentration between cows that had a trace or small in the ketone strip reading. This 3-page fact sheet was written by Klibs N. Galvão, Achilles Vieira Neto, Gustavo Peña, Joao Bittar, and Lucas Ibarbia, and published by the UF Department of Veterinary Medicine-Large Animal Clinical Sciences, October 2012.
http://edis.ifas.ufl.edu/vm186