24 Story Idea? Contact Paul.Nolan@Farms.com Better Pork | April 2024 that in outbreaks of APPV, it tends to be primarily gilt litters that are affected while sow litters are usually normal. Historically, porcine circovirus Type 2 (PCV2) was thought to contribute to congenital tremor, but this is now thought to be unlikely. Other viruses have been reported to be associated with congenital tremor in different parts of the world, including astrovirus, teschovirus, and “LINDA” virus. It is possible that multiple viruses can cause or contribute to congenital tremor. Type AIII has a genetic cause. It is a recessive trait located on the X chromosome, meaning that it is passed down from sows to their piglets. It is most commonly seen in male Landrace pigs. Females are more often asymptomatic but can be carriers of the gene. Type AIV is also genetic. It is found in the British Saddleback breed. Type AV is caused by exposure to toxins during pregnancy. Specifically, it is associated with a group of chemicals called organophosphates, which are used as insecticides. One example of an organophosphate chemical is metrifonate (trichlorfon). Type B has not yet had a causative agent identified, but it is not thought to be an infectious disease. Diagnosis Always consult your veterinarian when you notice an increase in congenital tremors in your herd. They can work with you to narrow down a cause and help to inform strategies for prevention. Other conditions may present similarly to congenital tremors and should be ruled out. Metabolic conditions that commonly affect newborn piglets including hypoglycemia HERD HEALTH In severe cases of congenital tremor, piglets may not be able to suckle well enough to get sufficient colostrum from their mother. Dr. Jack Krone photo LEAN EFFICIENT PROVEN Professional Nutrition & Management Services Animal Nutrition Inc. BSC Want to reduce antibiotics and maintain gain? 1-800-268-7769 Feed BSC Starter A premix
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