TY - JOUR
A2 - Tonacchera, Massimo
AU - Šamanc, Horea
AU - Stojić, Velibor
AU - Kirovski, Danijela
AU - Jovanović, Milijan
AU - Cernescu, Horia
AU - Vujanac, Ivan
PY - 2010
DA - 2010/02/10
TI - Thyroid Hormones Concentrations during the Mid-Dry Period: An Early Indicator of Fatty Liver in Holstein-Friesian Dairy Cows
SP - 897602
VL - 2010
AB - Relationship between postpartal fatty liver and thyroid gland activity during the peripartal and mid dry periods was studied. Twenty one dry cows were chosen. Blood samples were obtained on days −30, −2, and +12 related to calving and analized for thyroxine (T4) and triiodothyronine (T3). A T3/T4 ratio was calculated. Liver tissue samples were taken 12 d after calving and tested for the lipid content. Cows were divided into three groups: mild (<20% fat), moderate (20 to 30%), or severe fatty liver (>30%). Cows, that were affected with severe fatty liver, were hypothyroid prior to development of the condition due to lower T4 concentrations, and had significantly lower concentration of T3 and higher T3/T4 ratios than cows with mild and moderate fatty liver. Thus, hypothyroid state during mid-dry period may be an early indicator of postpartal fatty liver and may provoke T3/T4 ratio increase in this group of cows.
SN - 2090-8067
UR - https://doi.org/10.4061/2010/897602
DO - 10.4061/2010/897602
JF - Journal of Thyroid Research
PB - SAGE-Hindawi Access to Research
KW -
ER -