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Effect on milk production of vaccination with a bovine herpesvirus 1 gene‐deleted vaccine
Author(s) -
Bosch J. C.,
Frankena K.,
Oirschot J. T.
Publication year - 1997
Publication title -
veterinary record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.261
H-Index - 99
eISSN - 2042-7670
pISSN - 0042-4900
DOI - 10.1136/vr.140.8.196
Subject(s) - vaccination , herd , bovine herpesvirus 1 , medicine , veterinary medicine , milk production , biology , virology , zoology , herpesviridae , virus , viral disease
A field trial was conducted to determine the effect of vaccination with an inactivated bovine herpesvirus 1 (BHV1) gE‐negative marker vaccine on the milk production of dairy cows. The daily milk yield of 455 cows in six herds was measured electronically from six days before vaccination until 14 days after vaccination. The treatment consisted of two injections with either vaccine or placebo, both at an interval of four weeks. There was a small, but significant (P<0.05), decrease of about 1.4 litres per cow in milk production after a double vaccination, the negative effect being slightly greater after the second vaccination.