Improvement of technical results following use of Ingelvac CircoFLEXr in a Dutch organic breeding and fattening farm: a case report

摘要

Porcine Circovirus type 2 (PCV2) is a ubiquitous infection and major cause of production loss for the pig industry. The aim of this study was to evaluate the effect of vaccination against PCV2 on technical results of pigs on an organic breeding and fattening farm, focussing on growth and mortality of weaned piglets and fattening pigs. The study was based on retrospective data between January 2009 and May 2011. During the study period, three subsequent vaccination strategies were used: 1. Stellamune Oner, 2. Stellamune Oner+CircoFLEXr, 3. MycoFLEXr+CircoFLEXr. From these three periods, the corresponding management- andslaughterhouse data were analysed by an ANOVA-test. Due to few data in period 2 and an outbreak of AciinobaciUus pleuropneumoniae during periods 2 and 3, these two periods were combined in one period and analysed by a two-sample t-test. Mortality of weaned piglets decreased with 3.6% (0.6 - 6.6%) (P0.023) in comparison to period 1 and average daily weight gain improved by 21 gram (7 - 34 gram) (P0.004) in periods 2 and 3. Mortality of fattening pigs was 2.3% (1.2 - 3.5%) (P0.001) less than in period 1 and corrected energy conversion rate improved 0.27 (0.05 - 0.49) (P0.017). There was no significant effect on slaughterhouse parameters. In conclusion, vaccination against PCV2 improved technical results of weaned and fattening pigs on this farm. The advantage of vaccination with MycoFLEXr+CircoFLEXr instead of Stellamune Oner+CircoFLEXr is that the two FLEX-vaccines can be mixed and administered as a one shot vaccine, reducing work load and animal stressors.