TY - CPAPER AU - Kelly M. Lager, DVM, PhD and Susan L. Brockmeier, DVM, PhD TI - A Review of Area Spread and Summary of Recent Studies T2 - Allen D. Leman Swine Conference DP - American Association of Swine Veterinarians DB - AASV Swine Information Library UR - https://www.aasv.org/library/swineinfo/ PY - 2002 DA - 2002/09/01 L1 - https://www.aasv.org/library/swineinfo/Content/LEMAN/2002/2-05.pdf SE - Section II: Disease ER -