Egg Industry - October 2019 - 6

6 ❙ EggIndustry
EFFECTIVELY CONTROL SALMONELLA
Live vaccines
Two live Salmonella typhimurium (ST) vaccine strains
are available on the U.S. market, with three different
products offered. Label claims all mention the reduction of Salmonella colonization in different organs with
the approved vaccination program. Cross-protection
has been shown to reduce incidences of S. enteritidis,
typhimurium and Heidelberg. All are licensed for spray
at day of hatch and drinking water application or coarse
spray at later ages.
Poulvac ST offered by Zoetis is recommended for
use at day of hatch and during growout. Elanco sells two
live vaccines that contain the same strain with different
formulations. Sandra Aehle, an associate adviser with
Elanco, reports that AviPro Megan Vac 1 is recommended
for day-of-hatch use and AviPro Megan Egg is recommended during growout.
Industry professionals agree that most producers apply
the first live vaccine at day of hatch with a coarse spray
application. Subsequent live vaccines are given in the
drinking water or by coarse spray.

A common lesion found in birds with post-bacterin
syndrome is an enlarged mottled liver that is
friable (easily crumbled) and often results with
hemorrhage present. Dr. Eric Gingerich

Inactivated bacterins

U.S. Department of Agriculture has licensed Salmonella
enteritidis bacterins or combinations that are offered by
Ceva, Elanco, Merck and Zoetis. Generally, a combination
product containing Newcastle disease, infectious bronchitis and Salmonella is given to pullets about
three to four weeks before lay or transfer to the
Shell egg packing plant cleaning, sanitation
lay house.
guidelines: www.WATTAgNet.com/
Most producers administer the product intraarticles/35593
muscularly in the breast muscle. Some producers
have found subcutaneous injections of bacterins
All live Salmonella vaccines licensed in the United
in the inguinal fold to be safer and less reactive for pullets.
States are derived from strains attenuated by genetic
Several manufacturers also offer production of autogmodification to ensure their safety and not cause
enous bacterins to producers who desire specific immuSalmonella in vaccinated birds.
nity against a Salmonella strain that is not commercially
The National Organic Standard Board will be meeting
available. As federal regulations require that the strain be
in late October 2019 to decide if the board will continue
isolated from the layer producer's farms, it is not common
to approve the vaccines developed with excluded methods
to have autogenous products produced unless there has
(which includes genetic modification) for use in birds
been an outbreak of a unique Salmonella serovar.
certified as organic.
Epitopix is producing autogenous Salmonella bacterins
Recently, a subcommittee of the board released
using a patented technology called SRP (siderophore
a proposal to allow these excluded method vaccines
receptor and porin), which isolates proteins common to
to be used in organic production when an equivalent
all Salmonellas. This technology offers the potential to
product made with conventional technologies is not
reduce the disease impact of serogroups other than those
available.
used to produce the bacterin.
www.WATTAgNet.com ❙ October 2019


http://www.WATTAgNet.com/articles/35593 http://www.WATTAgNet.com/articles/35593 http://www.WATTAgNet.com

Egg Industry - October 2019

Table of Contents for the Digital Edition of Egg Industry - October 2019

Egg Industry - October 2019
How layer vaccination can effectively control Salmonella
Rose Acre facility redesign emphasizes food safety
Positioning hard-boiled eggs in the snacking market
Egg Industry - October 2019 - CT1
Egg Industry - October 2019 - CT2
Egg Industry - October 2019 - Egg Industry - October 2019
Egg Industry - October 2019 - Cover2
Egg Industry - October 2019 - CT3
Egg Industry - October 2019 - CT4
Egg Industry - October 2019 - 3
Egg Industry - October 2019 - How layer vaccination can effectively control Salmonella
Egg Industry - October 2019 - 5
Egg Industry - October 2019 - 6
Egg Industry - October 2019 - 7
Egg Industry - October 2019 - 8
Egg Industry - October 2019 - 9
Egg Industry - October 2019 - Rose Acre facility redesign emphasizes food safety
Egg Industry - October 2019 - 11
Egg Industry - October 2019 - 12
Egg Industry - October 2019 - 13
Egg Industry - October 2019 - 14
Egg Industry - October 2019 - 15
Egg Industry - October 2019 - 16
Egg Industry - October 2019 - 17
Egg Industry - October 2019 - 18
Egg Industry - October 2019 - 19
Egg Industry - October 2019 - Positioning hard-boiled eggs in the snacking market
Egg Industry - October 2019 - 21
Egg Industry - October 2019 - 22
Egg Industry - October 2019 - Cover3
Egg Industry - October 2019 - Cover4
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