Milford chronicle., 1951-01-12
Subject: NEWCASTLE DISEASE
"A Vital Message to the Poultry Industry

IA W4Co4 4S4SSS0SS y "
IN the campaign by poultry pathologists to stamp
out NEWCASTLE DISEASE there have been
injected into the picture many ideas on how to
combat this disease most effectively This has
served only to produce confusion in the minds of
poultrymen.
AS vital service to the poultry industry Vineland
Poultry Laboratories is presenting in this mess
age, the latest findings derived from it's own re-
search and field work plus the opinions of the
acknowledged leaders in poultry pathology It is
hoped that as a result of this analysis, a common
front and proven strain OF vaccine will be adopt
ed, so that NEWCASTLE DISEASE can be con-
Quered sooner.
Whot About lntronosol and Killed Vaceines?
It is the decision of Americas mostNeminent poul-
try pathologsts, that when some segments of the
poultry industry accepted with little questioning
the idea that you could produce durable immuni-
ty (ife) in day-old baby chicks by vaccination
with lntranasal vaccine they were victims of the
same attempts at oppOrtunism that befell others
who had earlier welcomed the now disproven vac
cnation of day-old chicks with Killed Vaccines.
When Intranasal or Killed Newcastle Vaccines
are used day-old chicks there is usually no i'm
mediate reaction and little mortality, other than
that which results from faulty application of the
product Then, after four weeks the real results
begin to tell
Because killed vaccine has the capacitV to i'm
munize less than 509o of the flock under four
weeks of age and the remainder of those chicks
which are immunized receive protection from only
CASTLE DISEASE soon begin to occur Yes al
most the same conditions prevail when Intranasal
vaccines are used.
Laboratory tests in the use of Intranasal vaccine
are invariably good. But when this vaccine is ap-
piled in the field its original promise fails Birds
begin to break out with NEWCASTLE DISEASE
anywhere from three to 10 weeks of age This
would indicate either that the duration of mmuni-
ty was limited or that the baby chicks were never
immunized in the first place What is the explana-
ton?
Porentol immunity
Either overlooked, or relegated to the BACKGROUND
for convenience, by advocates of IntranasaI or
Killed vaccines is the all important question of
parental immunity, an immunity which is probab-
ly carried by more than 9Oa6 of the chicks pro-
duced. This parental immunity may be defined as
such natural immunity transmitted to baby chicks
from parent stock which were vaccinated with
WiGg-Web Live Virus Newcastle Vaccine or
from parent stock recovered from a natural out
break. Remember! The duration of parental inn
munity in chicks varies. Some chicks may lose
parental immunity at the end of one week or ten
days. others at two weeks, and all but a small
percentage lose their parental immunity by the
time they reach four weeks of age.
Ahtigenicify
An explanation for the failure of Intfanasal and
killed vaccines may be found in the fact that par
entail immunity offsets the antigenicity (that is
1mmunizing qualites) of the strains used in the
productlon OF these products or that the
strains themselves were poorly antigenc Glow in
immunizing qualities) It is precisely for this
reason that VINELAND POULTRY LABORATOR-
les recommended that Vineland LIVE VIRUS
NEWCASTLE DISEASE VACCINE tWING-WHB
METHOD be used on chicks four weeks old This
was based on the knowledge that by this age all
chicks would have lost their parental immunity
and that the vaccination when properly applied
according to our instructions would offer the
greatest protection.
Numerous Outbreaks
~
outbreaks of Newcastle Disease in young, suscep-
Yes, It was VineIund Pc
Q FIRST produced laryngOtTaeheitiS vaccine il
9 FIRST produced laryngOtracaeitis, fowl box
Q FIRST produced Newcastle Disease Vaccine
Q FIRST preserved poultry Vaccines in vacuum
laboratory.
FIRST and probably still the only IabOrtaO
own premises for the production of e
breeders are under the supervision
OlOgy.
That is why we say, "reiy on YineIand Poultry Lab
VINELAND POULT
FOUNDED IN THE YEAR 1914 @5SSSt
Keen Belts, Exclusive Distributors for Yinelan,