PRD (Poultry Respiratory Disease)-CAP
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1 PRD (Poultry Respiratory Disease)-CAP Oct 24 th, 2018 Naola Ferguson-Noel, DVM, MAM, PhD
2 Objective 2.1.3: Co-infection of broiler chickens with Mycoplasma synoviae, NDV, IBV and ILTV to reproduce airsacculitis and mortality reported with MS infections in the field.
3 Completed Trials Mycoplasma synoviae-iltv vaccination Evaluation of ILT CEO Vaccine in MS Positive Broilers Evaluate effect of MS on protection from CEO vaccine Mycoplasma synoviae-ndv vaccination Evaluation of B1 LaSota vaccine in MS Positive Broilers Mycoplasma synoviae-ibv vaccination Evaluation of IBV Ark vaccine in MS Positive SPF chickens Mycoplasma synoviae-ibv/ndv vaccination Evaluation of triplex (Ark, Mass, La Sota) vaccine in MS Positive broiler chickens
4 Experimental Design Treatment group IBV Vaccination Yes (2 ) Yes (2 ) Yes (4 ) Yes (4 ) Yes (8 ) Yes (8 ) MS (8 ) No Yes No Yes No Yes 7 No No 8 No Yes
5 Experimental Design MS - K6677 log CCU/ml aerosol 1ml of actively growing culture per bird IBV - Mildvac -Ark (Arkansas Type Live Virus, MSD) 100ul eye drop
6 Experimental Design SPF layers 12 birds per group Swabs 3, 5, 7 & 14 dpv (4 and 8 wk IBV) Necropsy 14 dpc MS
7 MS AS Score Mean Score Neg control (G1) IBV at 2 IBV at 4 IBV at 8 (G3) (G5) (G7) MS only (G2) MS + IBV at 2 (G4) MS + IBV at 4 (G6) MS + IBV at 8 (G8)
8 MS qpcr - MS Mean (genome) copy number log Neg control (G1) IBV at 2 (G3) IBV at 4 (G5) IBV at 8 (G7) MS only (G2) MS + IBV at 2 (G4) MS + IBV at 4 (G6) MS + IBV at 8 (G8)
9 IBV IBV-Ark qrt-pcr Inverted Ct value G5 IBV at 4 G6 IBV@4 MS@8 G7 IBV@8 G8 IBV@8 MS@ dpi 5dpi 7dpi 14dpi
10 MS-IBV 140 Tracheal Lesions Mean Measurement (um) Neg control (G1) IBV at 2 (G3) IBV at 4 (G5) IBV at 8 (G7) MS only (G2) MS + IBV at 2 (G4) MS + IBV at 4 (G6) MS + IBV at 8 (G8)
11 Evaluation of Virulence Air sac lesion scores Tracheal lesions Synovitis Ovarian regression Egg production EAA? Weight gain? MS recovery - culture/pcr Serology
12 Naola Ferguson-Noel - July2017
13 Tracheal Lesion Evaluation of broilers co-infected with MS and ILTV Valerie Marcano AVMA 2018 Denver, CO
14 0 DPH Birds hatched 14 DPH MS Chal (2 groups) ILT Vx 28 DPH ILT Chal 7 DPH MS Chal (2 groups) 21 DPH 35 DPH Necropsy Treatment group MS ILT vaccine (14 DOA) ILT Challenge (28 DOA) A No No No B No No Yes C No Yes No D No Yes Yes E Yes (7 DOA) No Yes F Yes ( 7 DOA) Yes Yes G Yes (14 DOA) No Yes H Yes (14 DOA) Yes Yes
15 Gro MS ILTV ILT Average Comments up C Score A None changes observed B - - Ye s 1.1 Deciliation (9/11), dilated mucous glands (10/11), transitional epithelium (6/11), Mild lymphocytic infiltration (10/11) C - Yes None changes observed D - Yes Ye s E 7 - Ye DOA s F 7 DOA G 14 DOA Yes Ye s - Ye s 0.1 None changes observed 2.3 Deciliation (7/7), dilated mucous glands (5/7), transitional epithelium (5/7), moderate to severe lymphocytic infiltration (7/7) 1.1 Mild to moderate lymphocytic infiltration (13/16) 2.4 Deciliation (12/12), dilated mucous glands (10/12), transitional epithelium (10/12), moderate to severe lymphocytic infiltration (12/12) H 14 Yes Ye 1.4 Deciliation (12/12), mild to moderate
16 Grou MS ILTV ILT Average p C Score A B - - Yes 1.1 C - Yes D - Yes Yes 0.1 E 7 DOA - Yes 2.3 F 7 DOA Yes Yes 1.1 G 14 DOA - Yes 2.4 M e a n T r a c h e a l S c o r e s A a b B C a D a E c b F G c b c H H 14 DOA Yes Yes 1.4 G ro u p
17 A = N e g a t iv e C o n tr o l B = IL T C h a lle n g e C o n tr o l C = IL T V a c c in e C o n t r o l M e a s u r e m e n t s a a b a a b c a b c b c D = I L T V a c c in e + I L T C h a lle n g e E = M S ( 7 D O A ) + I L T C h a lle n g e F = M S ( 7 D O A ) + I L T V x + I L T C h a l G = M S ( 1 4 D O A ) + I L T C h a lle n g e H = M S ( 1 4 D O A ) + I L T V x + IL T C h a l A B C D E F G H G ro u p
18 A = N e g a t iv e C o n tr o l B = IL T C h a lle n g e C o n tr o l C = IL T V a c c in e C o n t r o l M e a s u r e m e n t s a a b a a b c a b c b c D = I L T V a c c in e + I L T C h a lle n g e E = M S ( 7 D O A ) + I L T C h a lle n g e F = M S ( 7 D O A ) + I L T V x + I L T C h a l G = M S ( 1 4 D O A ) + I L T C h a lle n g e H = M S ( 1 4 D O A ) + I L T V x + IL T C h a l A B C D E F G H G ro u p
19 MS-IBV 140 Tracheal Lesions Mean Measurement (um) Neg control (G1) IBV at 2 (G3) IBV at 4 (G5) IBV at 8 (G7) MS only (G2) MS + IBV at 2 (G4) MS + IBV at 4 (G6) MS + IBV at 8 (G8)
20 MS Only
21 Completed Trials Mycoplasma synoviae-iltv vaccination Evaluation of ILT CEO Vaccine in MS Positive Broilers Evaluate effect of MS on protection from CEO vaccine Mycoplasma synoviae-ndv vaccination Evaluation of B1 LaSota vaccine in MS Positive Broilers Mycoplasma synoviae-ibv vaccination Evaluation of IBV Ark vaccine in MS Positive SPF chickens Mycoplasma synoviae-ibv/ndv vaccination Evaluation of triplex (Ark, Mass, La Sota) vaccine in MS Positive broiler chickens
22 Variables Bird type SPF, broilers Bird age Methods of administration Timing of co-infections
23 Conclusions and Discussion MS lesions exacerbated by respiratory virus vaccination Effect on replication and shed of respiratory vaccines? Effect on protective immune response to respiratory vaccines?
24 Acknowledgments Maricarmen Garcia Sylva Riblet Rachel Jude Amanda Olivier Marianne Dos Santos Deborah Hilt Susan Williams Mark Jackwood Brian Jordan Victoria Drouet Charles Roney Ruth Wooten Holly Sellers
25 Thank you Naola Ferguson-Noel, DVM, MAM, PhD University of Georgia, Poultry Diagnostic & Research Center 953 College Station Rd., Athens, GA Phone: (706) Lab: (706)
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