Preliminary study on the effect of season on urinary analytes in healthy Italian dairy cows.
bovine, dairy cow
seasonality
urinalysis
Journal
Veterinary clinical pathology
ISSN: 1939-165X
Titre abrégé: Vet Clin Pathol
Pays: United States
ID NLM: 9880575
Informations de publication
Date de publication:
Sep 2022
Sep 2022
Historique:
revised:
16
11
2021
received:
10
09
2021
accepted:
11
01
2022
pubmed:
7
4
2022
medline:
15
9
2022
entrez:
6
4
2022
Statut:
ppublish
Résumé
Season is known to affect serum analyte concentrations in dairy cows, and the same can be hypothesized for urinary analytes, but information in this regard is lacking. The aim of the study was to assess the effect of seasonality on urinary variables in healthy dairy cows. Twelve Italian Holstein cows were randomly selected from a local herd, and urine specimens were collected once in each season of the year. For each cow, the lactation stage at each sampling time was also registered (lactation vs dry period), and physical examination and hematology and serum biochemistry measurements were used to assess health status. Three cows were voluntarily culled from the herd during the year; therefore, nine cows were included. Concentrations of urinary analytes recorded in each season for each cow were compared. Seasonality affected urinary protein-to-creatinine ratios (P = 0.012) with lower median values in summer compared with spring (P = 0.020) and autumn (P = 0.004); differences were also found in urinary sodium-to-urinary creatinine ratio (P = 0.009), with lower medians in summer compared with spring (P = 0.003) and autumn (P = 0.020). The direct consequences of higher summer temperatures and the acclimation strategies needed to adapt to this environment could explain the changes in urinary analytes that were recorded in the current study; in fact, decreased food and water consumption tend to increase urinary creatinine concentrations and decrease renal excretion of proteins and electrolytes. The present results suggest that seasonality can affect urinary variables of healthy dairy cows.
Sections du résumé
BACKGROUND
BACKGROUND
Season is known to affect serum analyte concentrations in dairy cows, and the same can be hypothesized for urinary analytes, but information in this regard is lacking.
OBJECTIVES
OBJECTIVE
The aim of the study was to assess the effect of seasonality on urinary variables in healthy dairy cows.
METHODS
METHODS
Twelve Italian Holstein cows were randomly selected from a local herd, and urine specimens were collected once in each season of the year. For each cow, the lactation stage at each sampling time was also registered (lactation vs dry period), and physical examination and hematology and serum biochemistry measurements were used to assess health status. Three cows were voluntarily culled from the herd during the year; therefore, nine cows were included. Concentrations of urinary analytes recorded in each season for each cow were compared.
RESULTS
RESULTS
Seasonality affected urinary protein-to-creatinine ratios (P = 0.012) with lower median values in summer compared with spring (P = 0.020) and autumn (P = 0.004); differences were also found in urinary sodium-to-urinary creatinine ratio (P = 0.009), with lower medians in summer compared with spring (P = 0.003) and autumn (P = 0.020). The direct consequences of higher summer temperatures and the acclimation strategies needed to adapt to this environment could explain the changes in urinary analytes that were recorded in the current study; in fact, decreased food and water consumption tend to increase urinary creatinine concentrations and decrease renal excretion of proteins and electrolytes.
CONCLUSIONS
CONCLUSIONS
The present results suggest that seasonality can affect urinary variables of healthy dairy cows.
Identifiants
pubmed: 35383380
doi: 10.1111/vcp.13115
pmc: PMC9545179
doi:
Substances chimiques
Creatinine
AYI8EX34EU
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
408-413Informations de copyright
© 2022 The Authors. Veterinary Clinical Pathology published by Wiley Periodicals LLC on behalf of American Society for Veterinary Clinical Pathology.
Références
J Dairy Sci. 2018 Jun;101(6):5020-5032
pubmed: 29525305
J Dairy Sci. 2015 Nov;98(11):7886-92
pubmed: 26364112
Vet J. 2004 May;167(3):281-5
pubmed: 15080877
J Vet Diagn Invest. 2021 Nov;33(6):1176-1179
pubmed: 34236006
Vet Clin Pathol. 2022 Sep;51(3):408-413
pubmed: 35383380
Am J Vet Res. 2012 Jun;73(6):779-88
pubmed: 22620691
Vet Clin Pathol. 2020 Mar;49(1):66-70
pubmed: 32108958
Can Vet J. 2009 Apr;50(4):383-8
pubmed: 19436445
Res Vet Sci. 2017 Oct;114:322-331
pubmed: 28651194
J Vet Intern Med. 2019 Mar;33(2):999-1008
pubmed: 30768734
J Dairy Sci. 2019 Jan;102(1):236-245
pubmed: 30391180
Vet Clin Pathol. 2018 Jun;47(2):284-288
pubmed: 29406602