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

• 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 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

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.

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
• ld

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

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

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 ?

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

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

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