Pig Stress Syndrome


HAL-1843 Test

Pig Stress Syndrome is an inherited condition that renders susceptible animals vulnerable to premature death at the same time substantially reducing meat quality. Scientists in Canada discovered that it is caused by a single mutation, HAL-1843, in one of the pig genes. Until this discovery the only way to identify affected animals was through their sensitivity to the anaesthetic gas Halothane, the so-called ‘Halothane Test’. Now UDL can carry out a simple test based on the PCR technique to identify those animals carrying the mutation as well as those affected by the disease. The test needs only a spot of blood on a filter paper strip so sample collection can be undertaken on the farm by animal handlers without requiring an expensive vet’s visit. This is then sent by ordinary post to the laboratory and results are available in 5 or 10 days depending on your level of need.

Types of Report

Production Swine

Production swine are animals purchased or sold solely for the purpose of producing progeny to be slaughtered for the production of meats or animals which are produced for slaughter but are recycled to be used for the production of the next generation of animals to be slaughtered for the production of meat. This category of swine attracts a reduced Royalty payment. We will need you to complete a simple form declaring that your animals are production swine.

Results Only

The report will indicate the status of each animal in the following terms:

  • heterozygote
  • homozygote negative
  • homozygote positive


This information is specific to the animal tested and is not valid for progeny. The trademark may NOT be used for any purpose.


A certificate will be issued indicating the HAL-1843™ status of the animal tested. The Certificate and the Trademark are specific to the animal tested and are not valid for progeny.