Document Detail

Subcutaneous electronic identification in cattle: a field study.
MedLine Citation:
PMID:  21813580     Owner:  NLM     Status:  MEDLINE    
The use of injectable transponders in cattle for identification purposes, for up to 30 months, was investigated. Passive electronic transponders, encapsulated in either polymer or glass, were injected subcutaneously into either the ear base or the earlobe of 652 calves in three populations. The animals were clinically examined weekly, and transponder signalling was checked immediately before and after injection, after two weeks and after about eight months. About 10 per cent of animals in one population were also checked after 20 and 30 months. No severe clinical or visible pathological changes were observed, and the calves' welfare was not apparently affected by the procedure. None of the transponders migrated from their injection sites. Eight months after injection, a signal was detected from 98.2 per cent of transponders injected in the ear base and from 90.5 per cent of those in the earlobe. At 20 and 30 months after injection, 10.4 per cent and 2.6 per cent of transponders, respectively, had ceased to signal. Thus, most transponders in the calves' ear base demonstrated functionality for up to 30 months.
T Løken; G Vatn; E Kummen
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-08-03
Journal Detail:
Title:  The Veterinary record     Volume:  169     ISSN:  2042-7670     ISO Abbreviation:  Vet. Rec.     Publication Date:  2011 Sep 
Date Detail:
Created Date:  2011-09-05     Completed Date:  2011-11-15     Revised Date:  2012-05-10    
Medline Journal Info:
Nlm Unique ID:  0031164     Medline TA:  Vet Rec     Country:  England    
Other Details:
Languages:  eng     Pagination:  250     Citation Subset:  IM    
Norwegian School of Veterinary Science, PO Box 8146 Dep, 0033 Oslo, Norway.
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MeSH Terms
Animal Husbandry / instrumentation*,  methods*
Animal Identification Systems / instrumentation*,  methods*
Electronics / instrumentation
Injections / veterinary
Time Factors
Comment In:
Vet Rec. 2011 Sep 3;169(10):247-8   [PMID:  21890605 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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