Citrullinaemia in Friesian calves |
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Authors: | Thornton R N Gilmour M L Rammel C A |
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Affiliation: | Batchelar Animal Health Laboratory, Ministry of Agriculture and Fisheries, Palmerston North, New Zealand. |
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Abstract: | Six Friesian calves from a pedigree herd died or were killed within 1 week of birth because of progressive central nervous disease in which the only consistent lesion was cerebral oedema. The cause was citrullinaemia, resulting from an autosomally inherited dysfunction of the urea cycle enzyme arginosuccinate synthetase. Citrullinaemia was diagnosed by demonstrating markedly elevated concentrations of citrulline in the blood of one calf and in the cerebral spinal fluid of another. One of two sires used in the herd was a heterozygous carrier of the disease. Heterozygocity was demonstrated using a polymerase chain reaction/restriction endonuclease test designed to detect the genetic mutation that causes citrullinaemia in cattle. |
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