Page 6 of articles about weaning in Articles

The presence of subpopulations of exposed and non-exposed sows in chronically PRRSV-infected breeding herds assists in the maintenance of virus circulation in the breeding herd over time.

In a previous article (March '99) we suggested a standardized terminology for the description of swine production systems. The terminology covered stages of production (breeding, nursery, finishing), management practices (isowean, sourcing of pigs, movement of pigs), and physical aspects and geographical locations of production facilities (numbers of buildings, loci, and sites).

A new proposed system for terms to use in describing the various one site and multi-site production systems that have evolved in the pork production industry, and a simplified system for diagraming various types of pig farms.