Volume 19, Number 6—June 2013
Letter
Colostrum Replacer and Bovine Leukemia Virus Seropositivity in Calves
Bhudipa Choudhury
, Christopher Finnegan, Jean-Pierre Frossard, Chris Venables, and Falko Steinbach
, Christopher Finnegan, Jean-Pierre Frossard, Chris Venables, and Falko Steinbach
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.
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