Document Detail


A novel method for transuterine identification of piglets.
MedLine Citation:
PMID:  18625588     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Implantable microchips provide a secure, permanent and unique identification of individual animals. When performing fetal intervention studies in experimental animal models easy and secure identification of fetuses is desirable, as having test and control groups within the same uterus reduces the total number of animals used in a study. The aims of this study were: (1) to establish a protocol to identify porcine fetuses in utero by microchip implantation and (2) to assess postnatally whether clinical or pathological reactions to the implant occurred. Two Danish Landrace/Danish Large White crossbred sows at day 100 of gestation were used. The sows were sedated with azaperone and induced with propofol intravenously. Anaesthesia was maintained with isoflurane and oxygen. Antibiotics were administered intramuscularly (i.m.) at induction and analgesia was given pre-, intra- and postoperatively. A laparotomy was performed and the uterus exteriorized. The rump of the first fetus was recognized through the uterine wall and the thigh muscle of the fetus was fixed between the thumb and the forefinger. The microchip was then implanted into the fetus at an angle of 45 degrees i.m. in the lateral hindleg using an insertion device with a 12G needle. The same procedure was done in every fetus. The uterus was returned to the abdomen and the abdominal wall closed. The sows gave birth to 24 liveborn piglets and one stillborn. None of the liveborn piglets were limping at the time of birth and no visible cutaneous or palpable reactions on the hindlegs were observed. Following euthanasia, the microchip was easily localized and no macroscopic reactions at the implantation site were seen. None of the piglets had more than one microchip implanted. Histology showed a chronic mild foreign body granulomatous inflammatory response with peripheral eosinophils surrounding the microchip. No inflammation was evident in the adjacent muscles. It is concluded that transuterine identification of piglets two weeks before delivery is feasible using a microchip implant as an effective, easy and reliable method for identification of individuals after birth.
Authors:
M M Birck; T Iburg; M Schmidt; P T Sangild; A K Hansen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Laboratory animals     Volume:  42     ISSN:  0023-6772     ISO Abbreviation:  Lab. Anim.     Publication Date:  2008 Jul 
Date Detail:
Created Date:  2008-07-15     Completed Date:  2008-10-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0112725     Medline TA:  Lab Anim     Country:  England    
Other Details:
Languages:  eng     Pagination:  331-7     Citation Subset:  IM    
Affiliation:
Division of Laboratory Animal Science and Welfare, Department of Veterinary Pathobiology, Faculty of Life Sciences, University of Copenhagen, Denmark. mbirck@life.ku.dk
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MeSH Terms
Descriptor/Qualifier:
Animal Identification Systems / methods,  veterinary*
Animals
Animals, Newborn
Female
Pregnancy
Specific Pathogen-Free Organisms
Swine / embryology*,  surgery*

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


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