Genetic Abnormalities

To access a list of known genetic carriers please use the following links.

OVERVIEW

When conducting online searches, you may see animals which have codes listed in curly brackets {} between the animal and registration number. These codes represent genetic abnormalities the animal is known to be tested free/carrier. Currently used codes are listed below.

  • HYC=Hypotrichosis Carrier
  • HYF=Hypotrichosis Free (tested and results indicate animal is not a carrier)
  • DLF=Dilutor Free (tested and results indicate animal is not a carrier)
  • DLC=Dilutor Carrier
  • IEF=Idiopathic Epilepsy Free (tested and results indicate animal is not a carrier)
  • IEC=Idiopathic Epilepsy Carrier
  • MSUDF=Maple Syrup Urine Disease Free (tested and results indicate animal is not a carrier)
  • MSUDC=Maple Syrup Urine Disease Carrier

Hypotrichosis

Partial to almost complete lack of hair. Affected calves are often born with very short, fine, kinky hair that may fall out leaving bare spots or areas particularly susceptible to rubbing. The condition may vary in expression as the animal matures and is usually less noticeable in older animals. The haircoat color will sometimes appear “frosted” or “silverish.” Tail switch may be underdeveloped.
Hypotrichosis Carriers

Dilutor

Carrier Hereford bulls or females when mated to black cattle can produce offspring with a haircoat that is gray, smokey or chocolate color.
Dilutor Carriers

Idiopathic Epilepsy

Age of onset or first seizure can be variable, ranging from birth to several months of age. Occurrence and persistence of seizures may be influenced by environmental stressors such as temperature extremes or increased physical activity. Upon initial onset of seizure episodes individuals will typically lie on their side with all limbs extended in a rigid state. Manual flexing of the limbs is possible, but return to the extended position occurs after release. Seizure episodes may last from several minutes to more than an hour.

 

Idiopathic Epilepsy Carriers

Maple Syrup Urine Disease

Calves are typically born without symptoms but by 2-4 days of age become slow, dull and eventually recumbent. The calves will often throw their heads back, lying on their side unable to rise. These calves may have some swelling of the brain at autopsy, but diagnosis requires laboratory investigation. The calves have a defect in an enzyme that breaks down complex amino acids in the diet and the buildup of these in the body creates the urine odor and brain damage. The disease name comes from the smell of urine observed in human babies (not always noted in calves).

 

How to Run Potential Carriers Report

Maple Syrup Urine Disease Carriers