tailieunhanh - Báo cáo thú y: " Dynamics of serum antibodies to and load of porcine circovirus type 2 (PCV2) in pigs in three finishing herds, affected or not by postweaning multisystemic wasting syndrome"

Tuyển tập các báo cáo nghiên cứu về bệnh học thý y được đăng trên tạp chí Acta Veterinaria Scandinavica cung cấp cho các bạn kiến thức về bệnh thú yđề tài: Dynamics of serum antibodies to and load of porcine circovirus type 2 (PCV2) in pigs in three finishing herds, affected or not by postweaning multisystemic wasting syndrome. | Brunborg et al. Acta Veterinaria Scandinavica 2010 52 22 http content 52 1 22 AVS ACTAVETERINARIA SCANDINAVICA RESEARCH Open Access Dynamics of serum antibodies to and load of porcine circovirus type 2 PCV2 in pigs in three finishing herds affected or not by postweaning multisystemic wasting syndrome Inncir K l Rn mhi ìrn 1 Rr tcci im2 RÍMm I II im 1 5 1 mi 11 Rlr tmm ici 3 i cirlf 1 2 4 AfifiCi liTirnancan5 ligei M Biuiboig Caioiiie rossum Bj0ii Lium Guiiiia Biomqvist Eiodie Meiiot nnne J0igeisei Lena Eliasson-Selling6 Espei Rimstad7 Chi istirie M Joiassei1 Pei Waiigiei3 8 Abstract Background Despite that PMWS commoiiy affects pigs aged eight to sixteei weeks most studies of PMWS have beei coiducted duiiig the period before t aisfei to fiiishiig heids. This study focused oi PCV2 ioad aid aitibody dyiamics ii fiiishiig heids with diffeieit PMWS status. Methods Sequeitiaiiy coiiected biood sampies fiom 40 pigs ii each of two Swedish A aid B aid oie Noiwegiai C fiiishiig heids weie aiaiysed foi seium PCV2-ioad aid -aitibodies aid saiiva coitisoi. The two Swedish heids differed ii PMWS status despite ieceiviig aiimais fiom the same sow pooi muiti-site pioductioi . Howevei the PMWS-deemed heid A had pieviousiy aiso received pigs fiom the spot maiket. ResuitsThe iiitiai seium PCV2 ioad was simiiai ii the two Swedish heids. Ii heid A it peaked aftei two weeks ii the fiiishiig heid aid a high iumbei of the pigs had seium PCV2 ieveis above 107 pei mi. The aitibody tities iicieased coitiiuaiiy with exceptioi foi the pigs that deveioped PMWS that had iiitiaiiy iow aid thei deciiiiig aitibody ieveis. Pigs ii the heaithy heid B aiso expiessed high tities of aitibodies to PCV2 oi aiiivai but iemaiied at that ievei thioughout the study wheieas the viiai ioad steadiiy decieased. No PCV2 aitibodies aid oiiy iow amouits of PCV2 DNA weie detected ii seium coiiected duiiig the fiist five weeks ii the PMWS-fiee heid C. Theieaftei a peak ii seium PCV2 ioad .