Tag: glossary

Vas Deferens– (ductus deferens), the duct derived from the mesonephric duct that connects the tail of the epididymis to the ampulla and transports sperm into the pelvic urethra.

 

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Haemophilus Somnus-A bacterial infection.

Clinical Symptoms

• fever
• incoordination
• head-pressing
• central nervous system signs

Prevention

• vaccine (two injections)
  • chlortetracycline, 350 mg/head/day for 28 days
  • oxytetracycline, 3-5 mg/lb daily for 4 days

Treatment

• Sulfonamides
• Oxytetracycline

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Calfhood Vaccination (Official Calfhood Vaccination)– Vaccination with Brucella abortus Strain 19 for heifers between 4 and 10 months old. The best age is at  5 months. Calfhood vaccination must be given by a federally accredited veterinarian (Most large animal …

Most Probable Producing Ability- (MPPA), Estimate of a cow’s future productivity for a trait (such as progeny weaning weight ratio) based on her past productivity.…

Birth Weight -(beef cattle)The weight of a calf within 24 hours after birth.

• Estimated Progeny Differences- (EPD’s) of the sire and dam are used to evaluate the genetic performance of the sire and dam to help determine birth weight before

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Outbreeding– The process of continuously mating females of the herd to unrelated males of the same breed.

Forms of Outbreeding:

• Outcrossing- the mating of unrelated animals
• Grading up- the mating of purebred sires to nondescript or grade females and

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Heiferette– A heifer that has calved once, after which the heifer is fed for slaughter. The calf has usually died or been weaned at an early age.…

Pay Weight– The actual weight for which payment is made. In many cases it is the shrunk weight

Formula:

• actual weight – pencil shrink = pay weight

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Thermoneutral Zone (TNZ) – Range in temperature where rate and efficiency of performance is maximized. Comfort zone.…