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Alternatives to the Use of Animals in Research
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ANIMAL IDENTIFICATION: THE MOUSE
Individual identification of animals plays a critical role in accurate record keeping. There are several methods of identification for each species. The needs of your lab should dictate appropriate method for the animal identification.

Method Advantages Disadvantages
Ear Tag
  • Inexpensive
  • Anesthesia not required
  • Simple procedure
  • Permanent
  • Possibility of local infection
  • Animal must be securely restrained
  • Tags can become dislodged
  • Tags can get caught in caging
Ear Punch
  • Inexpensive
  • Anesthesia not necessary
  • Permanent
  • Results are variable
  • Animal must be securely restrained
Tail Tattoo
  • Efficient
  • Permanent
  • Moderate expense
  • Experience / skill required
  • Anesthesia required
Electronic Transponders
  • Efficient
  • Anesthesia not required
  • Permanent
  • Easy to use
  • Highly accurate
  • Expensive
  • Current technology lacks standardization among products
  • Animal must be securely restrained