Glossary

Animal husbandry- the breeding,raising and care of farm animals.

Antibiotics- a substance produced by a living organism,that kills or inhibits the growth of micoorganiosms.

Antimicrobials- a substance that kills or inhibits the growth of microbes.

Conjugation- the one-way transfer of genetic material from a bacterium with an F plasmid to one lacking the F plasmid.

Extra-label – doses in excess of therapeutic – in excess of the dosage on the label.

F, F factor- the fertility factor, the ability of a bacteria, to form a long sex pilus that allows transfer of DNA.

Feed efficiency- the amount of energy an animal extracts from a given amount of feed. Found by dividing animal's weight increase by pounds of food ingested.

Pathogens- an organism capable or producing disease.

Plasmid - a strand or loop of DNA that exists independently of the chromosome in bacteria and yeast and that is capable of genetic replication

Subtherapeutic- low levels of medicine administered for extended periods of time.

Therapeutic- a dose of antibiotic intended to combat a particular infection at a level that eradicates those bacteria.

Transduction- the transfer of genetic material from one cell to another by means of a virus.

transformation- the transfer of genetic material from one cell to another resulting in a genetic change in the recipient cell.

Zoonosis- a disease that can be transferred from animals to humans.



References & Other Links

Beef and Range Workgroup-University of California Cooperative Extension "Beef Care Practices"
Detailed information on proper conditions of large-scale cattle production

Food and Drug Administration

ANTIBIOTICS IN ANIMAL FEEDS
chronological background on use of low-level antibiotics in animal feeds.

Antibiotics in Food Animals Reviewed
Handy, Carolyn "E. Coli. E. Coli and fast-food restaurants"

HFA "The Truth About Factory Farming"
How are animals typically treated on factory farms.

Jurgens, Marshall "Performance of Weanling Pigs Fed Diets Containing Yeast Culture and/or an Antibiotic"

McDonald, Clifford "Vancomycin-Resistant Enterococci Outside the Health-Care Setting: Prevalence, Sources, and Public Health Implications"

Nikolich, Mikeljon "PROMED-AHEAD: Antibiotics in livestock feed"

Prescott, Harley and Klein, Microbiology 3rd ed. Wm. C. Brown: 1996.

West, Joe W. "Feed Additives For Dairy Cattle"
A general site related to feed additives


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