RT Journal
T1 ELECTRICAL CONDUCTIVITY OF MILK IN DIFFERENT MILKING PHASES AND RELATIONSHIP WITH SUBCLINICAL MASTITIS AND MASTITIS PATHOGENS OF COWS
A1 V. Juozaitienė
A1 L. Anskienė
A1 E. Čereškienė
A1 A. Juozaitis
A1 J. Žymantienė
A1 V. Žilaitis
A1 R. Bobinienė
JF Journal of Animal and Plant Sciences
JO JAPS
SN 1018-7081
VO 27
IS 6
SP 1829
OP 1835
YR 2017
FD 2017/12/01
DO DOI NA
AB <p>The aim of the study was to investigate the relationships between the electrical conductivity of milk in different milking phases with subclinical mastitis and productivity of cows. Three hundred fourteen Lithuanian Black and White cows in 2-4 lactation months were evaluated with Lactocorder&reg;. We found on average 6.28 mS/cm and 7.17 mS/cm, for respectively electrical conductivity at highest milk flow (ELHMF) and electrical conductivity during the initial time (ELAP). The average was 6.66 mS/cm for the maximum electrical conductivity after reaching the highest milking speed (ELMAX) and 0.79 mS/cm for (beginning peak difference of the electrical conductivity (ELAD). The somatic cell count (r=0.196) and milk yield (r=-0.222) showed the strongest unfavorable correlation (P&lt;0.01) with ELHMF. Higher ELHMF was related to a greater frequency of mastitis. Pathogens of intramammary gland were found by 39 % of cows in group of ELHMF&lt;6 mS/cm and 52% - in group of ELHMF&ge;6 mS/cm (P=0.002). The milk from cows infected subclinically with&nbsp;<em>Staphylococcus aureus&nbsp;</em>had 0.55 - 0.68 mS/cm higher ELHMF, than with subclinically&nbsp;<em>Streptococcus agalactiae, Streptococcus u</em><em>beris</em>,&nbsp;<em>Streptococcus&nbsp;</em><em>dysgalaetia&nbsp;</em>(P&lt;0.001)<em>.</em></p>
K1 electrical conductivity of milk, milking phases, subclinical mastitis
PB Pakistan Agricultural Scientists Forum
LK https://thejaps.org.pk/AbstractView.aspx?mid=2017-JAPS-231