f al se l aye r syndrome whe re are we now
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F AL SE L AYE R SYNDROME : WHE RE ARE WE NOW? Mike Pe - PowerPoint PPT Presentation

F AL SE L AYE R SYNDROME : WHE RE ARE WE NOW? Mike Pe trik, DVM, MSc F o r E F O AGM, Ma r 27-2018 11 MONT HS AGO - ONT ARI O 22 flo c ks invo lve d in F a lse L a ye r Syndro me Birds didn t pe a k Pulle t


  1. F AL SE L AYE R SYNDROME : WHE RE ARE WE NOW? Mike Pe trik, DVM, MSc F o r E F O AGM, Ma r 27-2018

  2. 11 MONT HS AGO - ONT ARI O 22 flo c ks invo lve d in F a lse L a ye r • Syndro me Birds didn’ t pe a k • Pulle t b a rns se e me d to b e • c o mmo n link I BV implic a te d (De lMa rVa stra in) • Outb re a k simila r to a n inc ide nt in • Que b e c in 2015 F lo c ks de stro ye d • Va c c ina tio n o f b re e de rs inc re a se d • Da y-o ld va c c ine imple me nte d • Pulle t surve illa nc e b e g a n •

  3. 8 MONT HS AGO – QUE BE C • 4 c a se s o f fa lse la ye rs fro m Ma y to Se pte mb e r • Pe a ks: 40 to 77%. • 4 diffe re nt site s no t re la te d. • 3 o f 4 ha d I BV De lma rva stra in ide ntifie d. • All flo c ks we re va c c ina te d da ys o ld with Ma ss. • All flo c ks we re kille d a t 25 wks.

  4. 10 MONT HS AGO - ARI ZONA • ~1,000,000 b irds a ffe c te d • Pe a ks o f 70-85% • Ve ry distinc t time pe rio d da y o ld No v- Ja n • T he n it sto ppe d • I so la te d a PA stra in o f I BV • T ypic a l va c c ine pro g ra m with Ma ss- Co nn-Ark • Sta rte d va c c ina ting with Ma 5 a t da y o ld

  5. 6 MONT HS AGO - PE NNSYL VANI A • I ha ve se e n 6 c a se s o f c ystic o viduc ts • Ove r 2 mo nths (Jul – Aug 2017) • PA/ 1220/ 98 I B iso la te d fro m a flo c k • DVM is in Pe nnsylva nia • Sta rte d va c c ina ting wide ly with GA08 va c c ine

  6. 5 MONT HS AGO - WI SCONSI N • Hig h inc ide nc e o f Cystic Rig ht Oviduc t • Simila r to F a lse la ye r, b ut la ys e g g s • Re la te d? • Be c a use o f inc re a se d surve illa nc e , the re ha ve b e e n mo re I B viruse s fo und, a ltho ug h no t a sso c ia te d with dise a se

  7. 4 MONT HS AGO - ONT ARI O • 3 flo c ks fro m sa me pulle t b a rn • Pe a ke d ~90% • DMV iso la te d fro m 1 flo c k • T ite rs no t hig h o r inc re a se d • L e ss impa c t b e c a use o f va c c ine ?

  8. 3 MONT HS AGO – WE ST COAST • F lo c ks 10-20% b e lo w ta rg e t • PA stra in iso la te d fro m a ffe c te d fa rm, b ut no t a ffe c te d flo c ks • No dro ps in pro duc tio n, no hig h tite rs

  9. WHAT NOW? • Que b e c : • One ne w c a se (in the la st mo nth) • Pulle t flo c k te ste d po sitive a t 2wks o f a g e • PM a t 8 we e ks sho we d c ysts in o viduc t • Ra te o f c ysts wa s c o nsiste nt a t 8wks, 18wks a nd a t pe a k (~70%) • F lo c k wa s va c c ina te d a t da y o ld with Ma ss • Sinc e , va c c ina tio n ha s b e e n with Ma 5

  10. WHAT NOW? • Arizo na • No thing ne w, no inte re sting re sults fro m pulle t a nd la ye r surve illa nc e • Pe nnsylva nia • One ne w c a se in the pa st mo nth • Ve t wo nde rs if va c c ina tio n a t da y o f a g e ha s re duc e d numb e r o f c a se s • Wisc o nsin • No thing ne w

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