North American Edition (#2)
Read the Special Report on from the Western Poultry Disease
Conference offering new insights for managing necrotic
enteritis and coccidiosis.
Plus: Dr. Gary Gladys of Delaware's Allen Family
Farms draws on experience controlling coccidiosis; Why researchers are
investigating the role of
alpha-toxin in the
development of necrotic
enteritis; Vaccine project targets
E. coli, salmonella.
57th WPDC Special Report
Early coccidial cycling could help control feed costsEvaluation of coccidial-infection levels
among flocks in the US shows that
coccidiosis vaccination induces early and
mild coccidial cycling - an especially
relevant finding considering the soaring
cost of feed, Dr. Matilde Alfonso said.
Synchronized coccidiosis control, management yield better broiler resultsPerformance in broiler flocks can be
improved by coordinating the coccidiosiscontrol
program with management
practices, Dr. Linnea Newman said.
Immunity develops earlier in turkeys vaccinated for coccidiosisDevelopment of immunity against
coccidiosis in turkeys varies markedly with
the type of control program and appears
to start earliest in birds that are vaccinated
against the disease, reported Dr. John
Radu, a technical service veterinarian with
Intervet/Schering-Plough Animal Health.
Nutritionist: Aim for lowest coccidiosis-lesion scorePoultry producers should aim for the
lowest possible coccidiosis-lesion score
in their broilers to maintain optimum
performance, according to Dr. Robert
Teeter, a nutritionist at Oklahoma
State University.
Monitoring coccidiosis patterns can improve bird performance, profitsProducers looking for ways to improve
bird performance and their bottom lines
were advised to put more emphasis on
routine monitoring of coccidial patterns
in their flocks.
Antibody recognizes antigen in NE lesionsAstudy using immunohistochemistry
to demonstrate alpha-toxin in
intestinal lesions of necrotic enteritis
clearly showed that antibody raised
against the alpha-toxoid in Netvax
recognized antigens in the NE lesions,
according to Dr. Joan Schrader, a
scientist with Intervet/Schering-Plough
Animal Health. The alpha-toxin was
also detected using a commercially
available monoclonal antibody teststrip
kit.
Cover Story
Banking on ExperienceNo one ever said producing broilers in Sussex County, Delaware, would be easy. Between extremes in the weather and a dense bird population - over 200 million produced annually within 938 square miles, more than any other county in the nation - birds are highly susceptible to disease.
Late coccidial cycling, dermatitis linkedGangrenous dermatitis, a subcutaneous infection in poultry that's often
due to clostridial organisms, is topping the list of health problems at some
US poultry companies.
Tips for successful coccidiosis vaccinationSuccessful coccidiosis
vaccination depends on good
brooding management as well
as proper administration of the
vaccine in the hatchery at 1 day
of age, says Dr. Matilde Alfonso,
a technical service veterinarian
with Intervet/Schering-Plough
Animal Health.
WPC Forum Special Report
NE vaccine trials in EuropeTwo clinical field trials conducted in Europe demonstrated that vaccination
of hens with a
Clostridium perfringens
type A toxoid, or necrotic enteritis (NE) vaccine, prevented development of NE
in broiler progeny, reported Dr. Luciano Gobbi, Intervet/Schering-Plough
Animal Health's technical manager for poultry, Italy.
Vaccine lowers NE risk in 'real-world' conditionsA trial in the US designed to test the
Clostridium perfringens type A toxoid
vaccine under real-world conditions demonstrated that the vaccine lowers
the risk for NE mortality, according
to Dr. Charlie Broussard, a veterinarian with Intervet/Schering-Plough
Animal Health.
Role of diet in NE questionedDuring a lively interchange between
panel members and the audience, session
chairman Dr. Peter Scott said he has been
surprised at the higher prevalence of NE
in North America compared to Australia,
where the diet for broilers is wheat-based.
Wheat-based diets have been linked to a
higher prevalence of NE.
Alpha-toxin a 'primary player'In a discussion on the mechanisms of
protection conferred by the
Clostridium
perfringens type A toxoid vaccine,
Broussard confirmed that there is more
to be discovered about why and how the
vaccine triggers immunity.
Antibody recognizes antigen in NE lesionsAstudy using immunohistochemistry
to demonstrate alpha-toxin in
intestinal lesions of necrotic enteritis
clearly showed that antibody raised
against the alpha-toxoid in a
Clostridium
perfringens type A toxoid vaccine
recognized antigens in the NE lesions,
according to Dr. Joan Schrader, a scientist
with Intervet/Schering-Plough
Animal Health.
Spotlight
Getting a gripWhy are researchers investigating the role of
alpha-toxin in
the development of
necrotic enteritis? Two scientists share
insights from studies that could impact the management of
NE, a serious and costly disease.
Postcard
MoscowVIVEurope 2008 in Moscow provided
an opportunity to incorporate the emerging
Eastern European market into the biannual
livestock and poultry trade show. Of the more
than 5,500 visitors from 70 countries who
attended, many were from the Ukraine and
Belarus and most represented poultry farms.
Innovations
Flavored feed has potentialFlavored chicken feed might provide a
way to improve management of broilers
and layers, says B.L. Damron, of the
Institute of Food and Agriculture Sciences,
University of Florida.
Multimedia tool helps producers ensure best broiler diet, growthAn interactive educational program
designed to help broiler operators
ensure optimal coccidiosis control and
maximum growth potential has been
developed by Intervet/Schering-Plough
Animal Health.
Vaccine project targets E. coli, salmonellaThe old adage that �a bird in the hand is
worth two in the bush� may apply to a new
vaccine project underway at Arizona State
University, reports thepoultrysite.com.
Research Watch
NE strains of C. perfringens are mighty gut warriorsStrains of
Clostridium perfringens that
cause necrotic enteritis (NE) replace
C. perfringens strains that do not cause
the disease - and also battle against one
another in the chicken gut - indicates
research that could eventually lead to
improved understanding and better
management of NE.
Performance influenced by diet in coccidiosis-vaccinated broiler breedersIntegrators rearing replacement broiler
breeders should take into account the
finding that early flock performance can
be influenced by dietary composition,
depending on the genetic line and gender,
Leslee A. Oden, of Texas A&M University,
said at the American Association of Avian
Pathologists annual meeting held last July.
Surveys indicate increase in coccidiosis-infected flocksTwo extensive surveys conducted
in Norway indicate the incidence of
coccidia-infected broiler flocks has
increased from 42% to 76% during a
3-year period.
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