Testing for Neuropathic Hydrocephalus in your herd

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Neuropathic Hydrocephalus (NH) is a lethal genetic defect that has been identified in Angus and Angus-influenced cattle. NH is caused by a recessive mutation at a distinct location on a single chromosome. NH-affected calves are stillborn with an extremely large cranium with little or no brain or spinal cord.

  • It is estimated that 50 to 70 percent of mortalities relating to NH occur through embryonic or fetal loss during gestation. This may cause the defect to be misdiagnosed to go unnoticed by beef producers.
  • A common ancestor, GAR Precision 1680, has ben identified on either side of pedigrees of all affected calves. 


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