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An approximately 2-month-old 31.8-kg (70-lb) castrated male feeder pig that died was submitted for necropsy examination at the Diagnostic Center for Population and Animal Health at Michigan State University. The pig was raised on a farm for which porcine circovirus type 2 (PCV-2) infection had been reported in the 2 years before the pig's death; pigs on the farm had received appropriate vaccines since that time. Recently, a group of feeder pigs became ill; the producer suggested the illness was possibly due to heat stress.
The pig was in fair nutritional condition (body condition score, 2 [scale,
Dr. Komine's present address is IDEXX Laboratories KK, 5-8-18 Kajino-cho, Koganei-shi, Tokyo, Japan 184-8515.
Dr. Cunha's present address is B&M Consultoria Agropecuária Ltda, Rua Presidente Kennedy 839, Cascavel, PR, Brazil 85810-040.
Dr. Langohr's present address is Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803.