In this chapter, the following terms have the meanings indicated. Terms Defined. “Administered in a regular pattern” means used: For multiple courses of therapy in the same animal or group of animals; or As a standard operating procedure, including: In correspondence with a particular life stage of an animal, such as in ovo, at birth or hatch, or at weaning; As an ongoing management strategy or tool, such as in correspondence with a particular age or weight of an animal, time of the week, month, or year, or season; or When moving animals from one location to another. “Animal” means cattle, swine or poultry. “Dry cycle” means a period of time when a cow is not lactating. Elevated Risk. “Elevated risk” means a risk that is significantly higher than that present under normal or standard operating conditions. “Elevated risk” does not include a risk typically or frequently present under normal or standard operating conditions. “Prophylaxis” or “Prophylactic” means the prevention of disease or infection in the absence of documented clinical signs of disease or infection. “Medically important antimicrobial drug” means any drug from a class of drug or a derivative of a class of drug that is either: Made from a mold or bacterium that kills or slows the growth of other microbes, specifically bacteria, and used in human beings or intended for use in human beings to treat or prevent disease or infection; or Listed in: Appendix A of the federal Food and Drug Administration’s Guidance for Industry #152, including critically important, highly important, or important antimicrobial drugs; or A subsequent guidance document created by the federal Food and Drug Administration that ranks the medical importance of antimicrobial drugs.