Testing for Neuropathic Hydrocephalus in your herd

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.


Take Time, Do It Right - Collecting Samples for DNA Testing

You’ve already heard plenty about DNA t esting. You know DNA tests can be applied commercially to determine parentage and to manage genetic defects in cattle. You know that analysis of an animal’s DNA can determine the presence of gene markers associated with specific performance or carcass traits. You also know DNA genotyping has advanced to where testing can reveal an animal’s DNA profile — a summary of genetic influences on a variety of economically important traits.

American Angus Association - Neuropathic Hydrocephalus Fact Sheet

This fact sheet was developed to respond to questions commonly asked by American Angus Association members. 


Genetic Defects in Cattle - Part 2

Dr. Terry Stewart discusses the genetic defects Hydrocephalus, Arthrogyposis Multiplex (Curly Calf), Tibia Hemimelia (TH), Contractural Arachnodactyly (Formerly Fawn Calf). In addition he discusses haw to spot an animal afflicted and how to collect lab samples to verify the condition.

Heritable Birth Defects In Cattle

Inherited congenital anomalies are probably present in all breeds of cattle and propagated as a result of specific trait selection. In some breeds, the occurrence of inherited anomalies has become frequent, and economically important. Veterinarians, animal scientists, and cattle breeders should be aware of inherited defects, and be prepared to investigate and report animalsexhibiting abnormal phenotypes. This review will describe the morphologic characteristics,

Retinal Dysplasia and Internal Hydrocephalus in a Shorthorn Calf

Bovine hydrocephalus is a frequently encountered congenital defect but associated ocular lesions are rarely described. This paper records multiple ocular anomalies and hydrocephalus in a calf from a Shorthorn heard in Saskatchewan. 



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