Extralabel use of penicillin in food animals.

Penicillin is one of the most commonly detected drug residues in tissues and milk, and is the antimicrobial for which information is most often sought through FARAD.

Comparison of the use of regulatory assays and high-performance liquid chromatography for detection of residues of ceftiofur sodium metabolites in tissue specimens of culled dairy cattle.

Objective: To compare the results of regulatory screening and confirmation assays with those of high-performance liquid chromatography (HPLC) in the detection of ceftiofur metabolites in the tissues of culled dairy cattle.

Animals: 17 lactating Holstein dairy cows.

Procedure: Daily IM injections of ceftiofur sodium were administered at a dose of 2.

Current status of aquatic species biologics.

No vaccine is a substitute for good management and diligent biosecurity in an aquaculture facility. It is always important to ensure the best water quality possible, provide quality nutrition, avoid overcrowding of tanks and raceways, remove dead fish to prevent pathogen buildup and spread, and reduce or eliminate unnecessary stress on fish. Use of a preventive medicine vaccine program and improved management can help ensure good health in a fish population and reduce the industries' use of therapeutic agents.

Use of frozen semen to avoid human immunodeficiency virus type 1 transmission by donor insemination: a cost-effectiveness analysis.

Objective: Reappraisal of current guidelines mandating frozen-thawed semen.

Design: Cost-effectiveness analysis comparing the use of frozen semen with the use of fresh semen from the same donors without a second antibody test.

Setting: A Markov model computer simulation.