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32) Main objects of animal biotechnology:

Laboratory animals

Mouse

Drosophila

Chinese hamster

Sea urchin

Xenopus

Rat

Rabbit

Farm animals

cattle (cows, buffalo)

small ruminants (sheep and goats)

horses

pigs

poultry (chicken, turkey, duck, goose)

fish (salmon, carp, herring)

silkworm etc.

Improving human health depends on the understanding of inside biology (through genetics, biochemistry, physiology, immunology, anatomy etc) as well as outside (through environmental contacts with other living and non-living things/products).

For this purpose, many human diseases (e.g. genetic, acquired, metabolic or infectious) are modeled in animals to develop diagnostic assays, test therapies and

preclinical research on scientific basis. With advances in biotechnology, more and more assays and preclinical trials are conducted in the animal model systems to

understand the disease and functional biology because animal models mimic the human biology very closely. Popular lab animals include mice, rats, rabbits, fish and Drosophila. It is important to learn general biology and handling skills for these animals to use them inexperimental research.This is why the use of animals continue to be mandatory to meet the statutory requirements.

-Drosophila, usually the species Drosophila melanogaster - a kind of fruit fly, famous as the subject of genetics experiments by Thomas Hunt Morgan and others. Easily raised in lab, rapid generations, mutations easily induced, many observable mutations. Recently, Drosophila has been used for neuropharmacological research.

-Rat (Rattus norvegicus) - particularly useful as a toxicology model; also particularly useful as a neurological model and source of primary cell cultures, owing to the larger size of organs and suborganellar structures relative to the mouse.

-African clawed frog (Xenopus laevis) - eggs and embryos from these frogs are used in developmental biology, cell biology,biotech, toxicology, and neuroscience

-fish - has a nearly transparent body during early development, which provides unique visual access to the animal's internal anatomy. The fishs are used to study development, toxicology and toxicopathology,specific gene function and roles of signaling pathways.

-Mouse - the classic model vertebrate. Many inbred strains exist, as well as lines selected for particular traits, often of medical interest, e.g. body size, obesity, muscularity, voluntary wheel-running behavior.

-monkey - used for studies on infectious disease and cognition.

-Guinea pig - used by bacteriologists as a host for bacterial infections, hence a byword for "laboratory animal" even though less commonly used today.

-Chicken - used for developmental studies, as it is an amniote and excellent for micromanipulation (e.g. tissue grafting) and over-expression of gene products

-Cat - used in neurophysiological research

-Dog - an important respiratory and cardiovascular model, also contributed to the discovery of classical conditioning.

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