WATT PoultryUSA - October 2015 - 35

P O U LT R Y H E A LT H TO DAY.CO M

Pathways to protection

PROGRAM

B

USING A RECOMBINANT FOR

ILT

"

If a grower is seeing very high mortality rates,
the cost of two vaccinations may save money
in the long run.

When to consider it
Once viewed as a cold-season virus, ILT has become a year-round
threat in many broiler-production strongholds of the US. Cold,
wet weather and reduced ventilation often trigger ILT outbreaks.
Producers frequently choose to use a recombinant ILT vaccine in
situations of low challenge or if the challenge is not present but
there is a risk of exposure, particularly in medium-sized birds.
A recombinant vaccine can also be used to jump-start ILT
protection and serve as a reaction buffer when a modified-live
field vaccine is needed at 14 days.
Keck says that in cases of very high risk or outbreak situations,
a recombinant ILT vaccine administered in ovo, followed by a
CEO vaccine in the field, may be needed to help reduce mortality
levels and ensure ILT immunity. "If a grower is seeing very high
mortality rates, the cost of two vaccinations may save money in
the long run," he explains.
When transitioning off a modified-live vaccine program,
producers can opt to use a recombinant vaccine in ovo to help
buffer against what has hopefully become a diminishing field
challenge. It can also be insurance against any residual
vaccine persistence.

LLOYD KECK, DVM, ACPV

"

Bottom line: Each farm needs to look at its history, the
surrounding production area and the age and weight of birds
when selecting its primary and secondary options for
ILT vaccination.

Options for managing IBD
Using a recombinant ILT vaccine presents more options for
managing IBD. Among conventional modified-live vaccines,
Cookson recommends either using a mild IBD vaccine with
Marek's or an intermediate vaccine that can be administered
at 8 to 10 days or with a ND/IBV field boost at 14 to 18 days.
Administering an immune-complex vaccine such as Bursaplex®
along with a Marek's vaccine in ovo is another option. This type
of vaccine helps provide strong IBD protection as maternal
antibodies decline, he says, thus delaying and reducing the
period of infection while allowing for quicker recovery of the
bursa of Fabricius - a specialized organ necessary for B cell
development in birds.

ILT

According to Keck, birds raised to less than 4 pounds (or 5 weeks
of age) seldom exhibit mortality from ILT. So, unless growers are
facing an outbreak, it may not pay to vaccinate small birds. If an
ILT recombinant is needed in a small bird, the FPV recombinant
vaccine can be used since it causes fewer reactions and costs less
than the HVT vector vaccines.

SPECIAL ADVERTISING SUPPLEMENT

Another way to help reduce IBD virus levels is to continue
vaccinating throughout the summer. Summertime vaccination
combined with better ventilation rates reduces IBD pressure
going into the following winter.

Options for managing ND

(See ND recommendations under Program A.)

continued



Table of Contents for the Digital Edition of WATT PoultryUSA - October 2015

Contents
WATT PoultryUSA - October 2015 - Cover1
WATT PoultryUSA - October 2015 - Cover2
WATT PoultryUSA - October 2015 - Contents
WATT PoultryUSA - October 2015 - 2
WATT PoultryUSA - October 2015 - 3
WATT PoultryUSA - October 2015 - 4
WATT PoultryUSA - October 2015 - 5
WATT PoultryUSA - October 2015 - 6
WATT PoultryUSA - October 2015 - 7
WATT PoultryUSA - October 2015 - 8
WATT PoultryUSA - October 2015 - 9
WATT PoultryUSA - October 2015 - 10
WATT PoultryUSA - October 2015 - 11
WATT PoultryUSA - October 2015 - 12
WATT PoultryUSA - October 2015 - 13
WATT PoultryUSA - October 2015 - 14
WATT PoultryUSA - October 2015 - 15
WATT PoultryUSA - October 2015 - 16
WATT PoultryUSA - October 2015 - 17
WATT PoultryUSA - October 2015 - 18
WATT PoultryUSA - October 2015 - 19
WATT PoultryUSA - October 2015 - 20
WATT PoultryUSA - October 2015 - 21
WATT PoultryUSA - October 2015 - 22
WATT PoultryUSA - October 2015 - 23
WATT PoultryUSA - October 2015 - 24
WATT PoultryUSA - October 2015 - 25
WATT PoultryUSA - October 2015 - 26
WATT PoultryUSA - October 2015 - 27
WATT PoultryUSA - October 2015 - 28
WATT PoultryUSA - October 2015 - 29
WATT PoultryUSA - October 2015 - 30
WATT PoultryUSA - October 2015 - 31
WATT PoultryUSA - October 2015 - 32
WATT PoultryUSA - October 2015 - 33
WATT PoultryUSA - October 2015 - 34
WATT PoultryUSA - October 2015 - 35
WATT PoultryUSA - October 2015 - 36
WATT PoultryUSA - October 2015 - 37
WATT PoultryUSA - October 2015 - 38
WATT PoultryUSA - October 2015 - 39
WATT PoultryUSA - October 2015 - 40
WATT PoultryUSA - October 2015 - 41
WATT PoultryUSA - October 2015 - 42
WATT PoultryUSA - October 2015 - 43
WATT PoultryUSA - October 2015 - 44
WATT PoultryUSA - October 2015 - 45
WATT PoultryUSA - October 2015 - 46
WATT PoultryUSA - October 2015 - 47
WATT PoultryUSA - October 2015 - 48
WATT PoultryUSA - October 2015 - 49
WATT PoultryUSA - October 2015 - 50
WATT PoultryUSA - October 2015 - 51
WATT PoultryUSA - October 2015 - 52
WATT PoultryUSA - October 2015 - 53
WATT PoultryUSA - October 2015 - 54
WATT PoultryUSA - October 2015 - 55
WATT PoultryUSA - October 2015 - 56
WATT PoultryUSA - October 2015 - Cover3
WATT PoultryUSA - October 2015 - Cover4
http://www.wattpoultryusa-digital.com/201911
http://www.wattpoultryusa-digital.com/201910
http://www.wattpoultryusa-digital.com/201909
http://www.wattpoultryusa-digital.com/201908
http://www.wattpoultryusa-digital.com/201907
http://www.wattpoultryusa-digital.com/201906
http://www.wattpoultryusa-digital.com/201905
http://www.wattpoultryusa-digital.com/201904
http://www.wattpoultryusa-digital.com/201903
http://www.wattpoultryusa-digital.com/201902
http://www.wattpoultryusa-digital.com/201901
http://www.wattpoultryusa-digital.com/201812
http://www.wattpoultryusa-digital.com/201811
http://www.wattpoultryusa-digital.com/201810
http://www.wattpoultryusa-digital.com/201809
http://www.wattpoultryusa-digital.com/201808
http://www.wattpoultryusa-digital.com/201807
http://www.wattpoultryusa-digital.com/201806
http://www.wattpoultryusa-digital.com/201805
http://www.wattpoultryusa-digital.com/201804
http://www.wattpoultryusa-digital.com/201803
http://www.wattpoultryusa-digital.com/201802
http://www.wattpoultryusa-digital.com/201801
http://www.wattpoultryusa-digital.com/201712
http://www.wattpoultryusa-digital.com/201711
http://www.wattpoultryusa-digital.com/201709
http://www.wattpoultryusa-digital.com/201710
http://www.wattpoultryusa-digital.com/201708
http://www.wattpoultryusa-digital.com/201707
http://www.wattpoultryusa-digital.com/201706
http://www.wattpoultryusa-digital.com/201705
http://www.wattpoultryusa-digital.com/201704
http://www.wattpoultryusa-digital.com/201703
http://www.wattpoultryusa-digital.com/201702
http://www.wattpoultryusa-digital.com/201701
http://www.wattpoultryusa-digital.com/201612
http://www.wattpoultryusa-digital.com/201611
http://www.wattpoultryusa-digital.com/201610
http://www.wattpoultryusa-digital.com/201609
http://www.wattpoultryusa-digital.com/201608
http://www.wattpoultryusa-digital.com/201607
http://www.wattpoultryusa-digital.com/201606
http://www.wattpoultryusa-digital.com/201605
http://www.wattpoultryusa-digital.com/201604
http://www.wattpoultryusa-digital.com/201603
http://www.wattpoultryusa-digital.com/201602
http://www.wattpoultryusa-digital.com/201601
http://www.wattpoultryusa-digital.com/201512
http://www.wattpoultryusa-digital.com/201511
http://www.wattpoultryusa-digital.com/201510
http://www.wattpoultryusa-digital.com/201509
http://www.wattpoultryusa-digital.com/201508
http://www.wattpoultryusa-digital.com/201507
http://www.wattpoultryusa-digital.com/201506
http://www.wattpoultryusa-digital.com/201505
http://www.wattpoultryusa-digital.com/201504
http://www.wattpoultryusa-digital.com/201503
http://www.wattpoultryusa-digital.com/201502
http://www.wattpoultryusa-digital.com/201501
http://www.wattpoultryusa-digital.com/201412
http://www.wattpoultryusa-digital.com/201411
http://www.wattpoultryusa-digital.com/201410
http://www.wattpoultryusa-digital.com/201409
http://www.wattpoultryusa-digital.com/201408
http://www.wattpoultryusa-digital.com/201407
http://www.wattpoultryusa-digital.com/201406
http://www.wattpoultryusa-digital.com/201405
http://www.wattpoultryusa-digital.com/201404
http://www.wattpoultryusa-digital.com/201403
http://www.wattpoultryusa-digital.com/201402
http://www.wattpoultryusa-digital.com/201401
http://www.wattpoultryusa-digital.com/201312
http://www.wattpoultryusa-digital.com/201311
http://www.wattpoultryusa-digital.com/201310
http://www.wattpoultryusa-digital.com/201309
http://www.wattpoultryusa-digital.com/201308
http://www.wattpoultryusa-digital.com/201307
http://www.wattpoultryusa-digital.com/201306
http://www.wattpoultryusa-digital.com/201305
http://www.wattpoultryusa-digital.com/201304
http://www.wattpoultryusa-digital.com/201303
http://www.wattpoultryusa-digital.com/201302
http://www.wattpoultryusa-digital.com/201301
http://www.wattpoultryusa-digital.com/201212
http://www.wattpoultryusa-digital.com/201211
http://www.wattpoultryusa-digital.com/201210
http://www.wattpoultryusa-digital.com/201209
http://www.wattpoultryusa-digital.com/201208
http://www.wattpoultryusa-digital.com/201207
http://www.wattpoultryusa-digital.com/201206
http://www.wattpoultryusa-digital.com/201205
http://www.wattpoultryusa-digital.com/201204
http://www.wattpoultryusa-digital.com/201203
http://www.wattpoultryusa-digital.com/201202
http://www.wattpoultryusa-digital.com/201201
http://www.nxtbookMEDIA.com