H. Yacowitz, M.E. Weyand, A. Yacowitz and E.H. Weyand. 
Animal Identification and Marking Systems, Inc.. Piscataway, NJ.

Current methods available for the identification of neonate rodents prior to weaning have significant procedural weaknesses that limit their utility. For example, in the case of using a magic marker frequent applications are required; the injection of pigment into paws is time consuming to perform and to read; and toe clipping of animals is invasive …

Tail Tattoos for Humane, Safe, and Permanent Identification of Pigmented Mice

H. Yacowitz, A. Yacowitz, R.F. McConnell, G.N. Rao 
AIMS™ Inc, Piscataway, NJ 08854

Identification of albino mice has been accomplished by using tail tattoos with black pigment 242. However, tattoos on pigmented mice were difficult to read. A 2-year study was conducted to evaluate 3 tattoo pigments at two tattoo sites on 320 B6C3Fl mice. Weanling mice …

Albino Rodent Tail Tattooing: Two Years of Experimental Data and Observations

By Norman B. Guilloud, DVM, and A. Neill Johnson, DVM, Ph.D.

PRESENT METHODS FOR IDENTIFYING rats and mice are not always satisfactory. Ear notch- ing and ear tagging, though widely used by researchers, have inherent problems. Applying and reading ear notches is time consuming. When one person applies ear notches others may find them difficult to read …

A Device for Increasing Efficiency of Rat and Mouse Tattooing

H Yacowitz, BA Piscitelli, A Yacowitz 
Research and Development Laboratory, AIMS, Inc., Piscataway, NJ 08854

Permanent and humane identification of laboratory animals from day-old to maturity is being done at many laboratories using tail, ear, or body tattoos employing AIMS™ black pigment #242. In conducting large studies, speed of tattooing is an important factor. Tattooing usually involves dipping the …


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