Ott, Stephen L. - United States Department of Agriculture, National … - 1997
and regional herd-level prevalence of Mycobacterium paratuberculosis infection, estimate economic losses due to Johne … Health Technicians. Sera were tested for antibodies to M. paratuberculosis using a commercially available ELISA. Results …. paratuberculosis on U.S. dairy operations was 21.6 percent. Herd size differences were apparent, however, with higher infection …