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Volume 19, Number 6—June 2013

Letter

Colostrum Replacer and Bovine Leukemia Virus Seropositivity in Calves

Bhudipa ChoudhuryComments to Author , Christopher Finnegan, Jean-Pierre Frossard, Chris Venables, and Falko Steinbach
Author affiliations: Animal Health and Veterinary Laboratories Agency, New Haw, Surrey, UK

Main Article

Table

Bovine leukemia virus seropositivity of calves fed colostrum replacer, UK, 2009*

Location Time from initial sampling, mo
0 1 2 3 4
Dumfriesshire, Scotland
Calf 1 +++ ++ + IC
Calf 2
+++
+
+


Newport, Wales
Calf 1
++
++
NS
NS

Yorkshire, England
Calf 1 ++ + + NS
Calf 2 ++ + + NS

*Tested by ELISA (Institute Pourquier, Montpellier, France). +++, strong positive, sample to positive (S/P) ratio >200; ++, positive, S/P ratio >100; +: weak positive, S/P ratio 60–99; –, negative, S/P ratio <60; IC, inconclusive, S/P ratio 60–70; NS, not sampled.

Main Article

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