Journal cover Journal topic
Archives Animal Breeding Archiv Tierzucht
Journal topic

Journal metrics

IF value: 0.991
IF0.991
IF 5-year value: 1.217
IF 5-year
1.217
CiteScore value: 2.0
CiteScore
2.0
SNIP value: 1.055
SNIP1.055
IPP value: 1.27
IPP1.27
SJR value: 0.425
SJR0.425
Scimago H <br class='widget-line-break'>index value: 28
Scimago H
index
28
h5-index value: 13
h5-index13
Supported by
Logo Leibniz Institute for Farm Animal Biology Logo Leibniz Association
Volume 55, issue 3
Arch. Anim. Breed., 55, 219–225, 2012
https://doi.org/10.5194/aab-55-219-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.
Arch. Anim. Breed., 55, 219–225, 2012
https://doi.org/10.5194/aab-55-219-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.

  10 Oct 2012

10 Oct 2012

Vitamin B12 and homocysteine levels in blood of dairy cows during subacute ruminal acidosis

C. Cannizzo1, M. Gianesella1, S. Casella2, E. Giudice3, A. Stefani4, L. M. Coppola1, and M. Morgante1 C. Cannizzo et al.
  • 1Dipartimento di Scienze Cliniche Veterinarie, Facoltà di Medicina Veterinaria, Università degli Studi di Padova, Legnaro, Italy
  • 2Dipartimento di Scienze Sperimentale e Biotecnologie Applicate, Facoltà di Medicina Veterinaria, Università degli Studi di Messina, Messina, Italy
  • 3Dipartimento di Sanità Pubblica Veterinaria, Facoltà di Medicina Veterinaria, Università degli Studi di Messina, Messina, Italy
  • 4Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy

Abstract. The aim of this study was to investigate the variations of vitamin B12 and homocysteine in blood of dairy cows during subacute ruminal acidosis (SARA). On 228 subjects ruminal liquid was collected through rumenocentesis technique and rumen pH was immediately measured by a portable pH-meter. On the basis of pH values all cows were classified (bovine class) in Group A (animals with rumen pH>5.7), Group B (animals with rumen pH between 5.6 and 5.7) and Group C (animals with rumen pH<5.6). In relation to the acidosis risk depending on the rumen pH (herd class), the herds were classified in Group 1 (normal herds: less than 33 % cows with rumen pH<5.8), Group 2 (critical herds: more than 33 % cows with rumen pH between 5.5 and 5.8) and Group 3 (acidosis herds: more than 33 % cows with rumen pH<5.5). On blood samples, collected by jugular venipuncture, vitamin B12 and homocysteine were measured by chemiluminescent immunological tests. One-way analysis of variance (ANOVA), followed by Bonferroni test, showed significant differences (P<0.05) for vitamin B12 in bovine class and significant differences (P<0.05) for homocysteine in herd class. The influence of rumen pH values resulted in adequate vitamin B12 and homocysteine levels to meet microbial and cow requirements and fatty acids modifications in dairy cows affected by SARA. Moreover, the increase of vitamin B12 could be due to the presence of analogues which interfere with the transport of the vitamin. These findings provide more information on blood modifications during SARA.

Download
Citation