Blood Sugar and Protein Levels in the Milk of Dairy Cattle Based on Their Physiological State


  • Claudia Pânzaru Iasi University of Life Sciences, Faculty of Food and Animal Sciences, Romania
  • Marius Gheorghe Doliș Iasi University of Life Sciences, Faculty of Food and Animal Sciences, Romania
  • Răzvan Mihail Radu-Rusu Iasi University of Life Sciences, Faculty of Food and Animal Sciences, Romania
  • Mădălina Alexandra Davidescu Iasi University of Life Sciences, Faculty of Food and Animal Sciences, Romania


blood, cattle, glucose, milk, protein


This study aimed to determine the correlations between blood glucose levels, milk protein levels, and the physiological status of cows in four categories within the Research and Development Unit for Cattle Farming in Dancu, Iași (pregnant cows aged between 4-6 years; cows aged 3-5 years, in the 3rd and 5th month of gestation, and were clinically healthy; cows aged 5-6 years, at 48 hours postpartum, and clinically healthy; cows aged 4-6 years, in the 3rd month of lactation, with subclinical mastitis). The results revealed blood glucose values ranging from 28.81±7.15 mg/dl to 50.34±10.31 mg/dl, which are within the normal range for the physiological state of the cows in these groups. The protein percentage ranged from 2.71% to 7.29%, with the lowest value observed in cows with subclinical mastitis and the highest in those in the colostrum period; these results indicate normal values for their specific stages. The findings demonstrate that the studied parameters align with the physiological state of the analysed cows. Overall, the results underscore the importance of metabolic monitoring and the enhancement of housing conditions for dairy cows in this unit.


Maciuc, V., Managementul creșterii bovinelor, Alfa Publ., Iași, 2006, pp. 56-59.

Ruginosu, E., Fiziologia și fiziopatologia parturiției și post-parturiției, PIM Publ., Iași, 2008, pp.71-73.

Belibasakis, N. G., Progia, E., Papaioannou, A., Comparison of maize and alfalfa silages on milk production, milk composition and blood components of dairy cows,, 1997, 42(8), 239-242

Bond, G.B., de Almeida, R., Ostrensky, A., Molento, C. F. M., Welfare assessment methods and critical points for dairy cattle, Ciencia rural, 2012, 42(7), 1286-1293,

Eslamizad, M., Dehghan-Banadaky, M., Rezayazdi, K., Moradi-Shahrbabak, M., J. of Dairy Sci., 2010, 93(9), 4054-4061

Doreau, M., Boulot, S., Martinrosset, W., Effect of parity and physiological-state on intake, milk-production and blood parameters in lactating mares differing in body size, Ani. Prod., part 1, 1992, 53, 111-118

Rhind, S. M., Bass, J., Doney, J. M., Pattern of milk-production of east Friesland and Scottish blackface ewes and associated blood metabolite and hormone profiles, Ani. Prod., part 2, 1992, 54, 265-273

Mărgărint, I., Boișteanu, P. C., Halga, P., Bazele morfofiziologice ale producției de lapte, Vasiliana 98 Publ., Iași, 2001, pp. 102-106.

Megahed, A. A., Hiew, M. W. H., Townsend, J. R., Messick, J. B., Constable, P. D., Evaluation of an Electrochemical Point-of-Care Meter for Measuring Glucose Concentration in Blood from Periparturient Dairy Cattle, Journal of Veterinary Internal Medicine, 2015, 29(6), 1718-1727

Ivanova, R., Nikolov, V., Malinova, R., Study on hematological characteristics of native Rhodope Shorthorn cattle breed, Scientific papers-series D-Animal science, 2020, 63(2), 266-271.