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GUMBORO FIELD EXPERIENCES IN SPAIN
¡ THINGS WE HAVE LEARNT !
JOSÉ LUIS VALLS GARCIA
Veterinario consultor avícola
Barcelona, 15th March 2016
GUMBORO is an Enzootic disease :
Challenge will come immediately after protection by MDA has reached unprotective level
IBDV will persist, cycle after cycle
IN OTHER WORDS : If a farm was with Gumboro IBDV yesterday,
then, it will have it again tomorrow
ACTIONS REQUIRED BUT NOT ENOUGH
CLEANING
DISINFECTION
DISINSECTION
RODENT CONTROL
BIOSECURITY
DANGER IBDV
WHICH IS THE OBJECTIVE OF GUMBORO VACCINATION ?
PROTECT THE CHICKENS
LOWER THE CHALLENGE
AVOID PRESSURE ON FARM OF IBDV POPULATION
INMUNE COMPLEX VACCINE
Following administration, the protection starts immediately after vaccine virus replication, which occurs after MDA have reached moderate level.
Vaccine adapts to the level of MAD
The protection against infection and re-excretion of the challenge virus most of the time reaches 100%.
DOUBTS OF VETERINARY
HATCHERY vs FIELD VACCINE APPLICATION
INJURIES IN THE BURSA: INMUNOSUPRESSION??
INMUNE COMPLEX: RETURN OF INVESTMENT
THIS PRESENTATION ATTEMPTS TO CLARIFY THESE QUESTIONS
CHICK PROGRAM – FIELD SERVICES SPAIN
CEVA
CONTINUOUS MONITORING AGAINST
GUMBORO
OBJECTIVE of CEVA SPAIN TEAM
CHECK THE HEALTH STATUS OF COMPANIES
AND ASSESS THE EFFECTIVENESS OF VACCINATION PLANS SET
THINGS WE HAVE LEARNT…
WORKING WITH INMUNO-COMPLEX VACCINE
SINCE 2009
WITH A LOT OF TRIALS AND INFORMATION
IT IS WORKING WITH DATA 62,4 MILLION CHICKENS / YEAR
C. CAZABAN
SAMPLES SEROLOGY SPANISH TEAM CEVA
COMPANY A
BIOCHEK TEST
COEFFICIENT OF VARIATION
Is the dispersión of titles of the flocks in the histogramMeasuring uniformity of titles Ideal; to present CV% lower in lots
Coefficient of variation Interpretation
< 40 % Excellent response to vaccination
< 40 – 60 % correct immune response
> 60 % There are birds without proper vaccine response
> 80 % Many non-uniformityRecent outbreak field
TRM: 34 FARMS; 17% CV between midpoints - Slaughter bloods
INTERMEDIATE VACCINE DW: 37 FARMS; 61% CV between midpoints - Slaughter bloods
FLOCKS VACCINATED :
BIOCHECK TEST
TRM: 58 FARMS; 26% CV between midpoints - Slaughter bloods
BIOCHECK TEST
2014
ELISA TESTING ( TRANSMUNE – VAXXITEK )
ELISA TESTING TRANSMUNE - VAXXITEK
BIOCHEK TEST
BIOCHEK TEST
BIOCHEK TEST
BIOCHEK TEST
IBD CEVA Biochek 2012 35d o more
CECAV - SPAIN
IBD CEVA Biochek 2015 35d o more
CECAV - SPAIN
INMUNO COMPLEX
INJURIES IN THE BURSA: INMUNOSUPRESSION ?
COMPANY B
All samples were taken fromhealthy chickens in routine visits
by the technical teamof CEVA Spain
PCR RESULTS & LYMPHOID DEPLETIONvs VACCINATION PLAN
SAMPLES TAKEN 2013 – 2015CRESA Y CECAV
VACCINATION PLAN:- DRINK OF WATER ( 71 samples )- INMUNO COMPLEX ( 248 samples )- HVT-VP2 ( 35 samples )
DRINKING WATER VACCINATION vs HATCHERY INMUNO COMPLEX
Average detectable vaccine replication (RT-PCR) after drinking water vaccination was delayed compared to that of the average hatchery vaccinated flocks
Average vaccine antibody response after drinking water vaccination was delayed compared to that of the average hatchery vaccinated flocks
Most likely due to the timing or quality of the application
INMUNO COMPLEX
RETURN INVESTMENT ?
PRODUCTION DATA 2013COMPANY C
WEIGHT FCR DAYS ADG MORT. IEE COST FINAL /
Kg
5,06% -1,47% 0,91% 3,98% 8,82% 5,66% -1,73%
1.115.660 chickens DW VACCINE
381.490 chickens TRM VACCINEVs
RETURN OF INVESTMENT
COMPANY CNº CHICKENS / YEAR = 18.500.000AVERAGE WEIGHT = 2,645 Kg / CHICKENCOST DIFFERENCE BETWEEN PLANS VACCINE = 0,018 EU/KG
TOTAL RETURN 1.000 CHICKENSRETURN OF INVESTMENT INMUNO COMPLEX
47,61 EUROS
PRODUCTION DATA 2014 - 2015COMPANY D
WEIGHT FCR DAYS ADG MORT. IEE COST FINAL /
Kg
+1,47 % -6,33 % -5,69 % +8,00 % +5,15 % +14,69 % -1,52 %
2.175.056 chickens DW VACCINE
2.674.487 chickens TRM VACCINEVs
RETURN OF INVESTMENT
COMPANY DCOST DECREASE 1,52 %AVERAGE WEIGHT = 2,701 Kg / CHICKENCOST DIFFERENCE BETWEEN PLANS VACCINE = 0,014 EU/KG
TOTAL RETURN 1.000 CHICKENSRETURN OF INVESTMENT INMUNO COMPLEX
37,80 EUROS
RETURN INVESTMENTINMUNO COMPLEX VACCINE
COMPANY RETURN euros / KG RETURN euros / 1.000 CHICKENS
RETURN euros / 20 MILLIONS YEAR
C 0,018 47,61 952.200
D 0,014 37,80 756.000
AVERAGE 0,016 42,71 854.000
CONCLUSIONSWHAT WE HAVE LEARNT ?
BETTER RESULTS (PCR AND SEROLOGY) WITH INMUNO COMPLEX VACCINE AND HATCHERY APPLICATION
INTERMEDIATE VACCINES vs INMUNO COMPLEX: THE LYMPHOID DEPLETION IS SIMILAR
THE INJURIES OF THE BURSA ARE REVERSIBLES
CONCLUSIONSWHAT WE HAVE LEARNT ?
ONCE BURSA IS COLONIZED BY INMUNO COMPLEX VACCINE, FIELD IBD VIRUS CANNOT INFECTED BIRDS
HOMOGENEUS BURSA COLONIZATION: ALL SAMPLES POSITIVE
SMOOTH TRANSTION FROM PASSIVE TOWARDS ACTIVE INMUNITY
RETURN OF INVESTMENT IS BETTER INMUNO COMPLEX
THANKS TO THE CEVA SPAIN TEAM ¡ WONDERFUL PEOPLE !
THANK YOU
VERY MUCH
FOR YOUR
ATTENTION