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第18号公告板 - Spring 2004
VirologyPMWS-Circovirus-PDNS
HARDGE T, GAUMANN H, HASBERG W, LANGE S
The economic impact of PMWS in the nursery.
International Pig Topics, Vol. 18, Nº8, 11-12
The overall cost of a PMWS outbreak in an off-site nursery was determined by means of data about weight gain, mortality due to PMWS or secondary infections and veterinary interventions. The pre- and post-PMWS periods were compared to the PMWS period. During the outbreak, the gross margin was reduced by 3.9 and 4.1? per pig compared to the pre- and post-PMWS periods respectively. In this case, the applied control strategies consisted in 1) the optimization of the vaccination program for PRRS: vaccination was anticipated from the 4th to the 3rd week of life so as to avoid concomitant PCV2 circulation and vaccination and allow piglets to reach a suitable level of immunity before their introduction into the nursery farm, 2) the reduction of pig-to-pig contact through the all-in/all-out method, 3) Disruption of infection chains for secondary pathogens such as Streptococcus suis with major care taken for removal of teeth and tails, 4) improvement in the management of the replacement gilts which were then purchased from only one producer. This approach allowed to reduce mortality and improve performance in the post-PMWS period.
