| animals, inbred strains | Animals produced by the mating of littermates or siblings over multiple generations. The resultant strain of animals is virtually identical genotypically. Highly inbred animal lines allow the study of certain traits in a relatively pure form. (12 Dec 1998) |
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| animals, domestic | Animals which have become adapted through breeding in captivity to a life intimately associated with man. They include animals domesticated by man to live and breed in a tame condition on farms or ranches (e.g., horses, cattle, sheep) and those raised or kept for pleasure and companionship (e.g., dogs, cats, horses). (12 Dec 1998) |
| animals, suckling | Young, unweaned mammals. Refers to nursing animals whether nourished by their biological mother, foster mother, or bottle fed. (12 Dec 1998) |
| animals, transgenic | Animals, or the offspring of such animals, into which cloned genetic material has been experimentally transferred by microinjection of foreign DNA, either directly or into embryos or differentiated cell types. Transgenic rabbits, mice, fish, xenopus, sheep, pigs, and chickens have been produced using genes of sea urchins, candida, drosophila, and mice. (12 Dec 1998) |
| animals, wild | Animals considered to be wild or feral or not adapted for domestic use. It does not include wild animals in zoos for which animals, zoo is available. (12 Dec 1998) |
| auxotrophic strains | Strain's which are derived from the prototrophic strain but which require extra growth factors. (05 Mar 2000) |
| rats, inbred strains | Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations or by parent x offspring matings carried out with certain restrictions. This also includes animals with a long history of closed colony breeding. (12 Dec 1998) |
| rats, mutant strains | Rats bearing mutant genes which are phenotypically expressed in the animals. (12 Dec 1998) |
| mice, inbred strains | Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations, or by parent x offspring matings carried out with certain restrictions. All animals within an inbred strain trace back to a common ancestor in the twentieth generation. (12 Dec 1998) |
| mice, mutant strains | Mice bearing mutant genes which are phenotypically expressed in the animals. (12 Dec 1998) |
| prototrophic strains | Strain's that have the same nutritional requirements as the wild-type strain. (05 Mar 2000) |
| sprains and strains | A collective term for muscle and ligament injuries without dislocation or fracture. A sprain is a joint injury in which some of the fibres of a supporting ligament are ruptured but the continuity of the ligament remains intact. A strain is an overstretching or overexertion of some part of the musculature. (12 Dec 1998) |