Swine producers have several options when it comes to treating pigs for PRRS. Some treatment methods include letting the disease follow its course and treating clinical signs of individuals and groups (no-intervention), others use commercial vaccines, and others will use pulmotil in the 4 weeks following the PRRS onset with or without virus exposure. The data about loses and expenditures during PRRS outbreaks are available, but there are no standard approaches to collect and to analyze such data. The objective of this study is to evaluate clinical and economical efficiency of commonly used PRRS intervention strategies in Canadian sow herds. In this study swine veterinarians were asked to provide records from sow farms that had PRRS outbreaks and to fill out questionnaires with demographics, diagnostics and intervention data. Results suggest that the no-intervention strategy seemed to be the most costly approach of managing a PRRS outbreak. Management of PRRS under alternative, and more costly strategies, was expected to yield higher revenues on average, although results vary among different scenarios and no single methods is best in all scenarios. It was hypothesize that most herds that experience PRRS outbreaks were using either commercial vaccination, or the homologous exposure and pulmotil strategy.