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Salmonella serotypes are changing — monitor which ones are in your flock
It’s imperative for poultry producers and companies to know what strains of Salmonella may be circulating in their flocks, said Chuck Hofacre, president of the Southern Poultry Research Group in...
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Survey shows US poultry industry’s evolving yet flexible approach to coccidiosis management
After years of being an afterthought in many broiler-production schemes, coccidiosis vaccines have become the cornerstone for many control programs.
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‘Competitive exclusion’ is potential benefit of live Salmonella vaccines in young birds
Live vaccines for Salmonella have been found to start offering protection within a few days of administration, acting “almost as a [form of] competitive exclusion,” said Chuck Hofacre, president...
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Light impacts behavior in cage-free aviaries
Birds can move out of the reach of the workers’ hands in a multi-tier aviary system, so employees have to climb into the system to get to them. Researchers from Michigan State studied light...
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Breed may impact broiler response to Salmonella infection
Research at the University of Arkansas suggests broiler breed could affect birds’ immune response to Salmonella exposure, according to Shawna Weimer, PhD, director of the Center for Food Animal...
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Study highlights risk of high Salmonella exposure, more persistent serotypes
Feed conversion takes a bigger hit in birds with higher Salmonella exposure, while Salmonella Reading outlasts other serotypes through the grow-out period, suggests new work from the University of...
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‘Reverse genetics’ may offer new IBV vaccine targets
Researchers at The Pirbright Institute in the UK report that a recent study provides evidence that mutations in the genetic code for non-structural proteins “offer a promising way” to make...
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Poor IBV vaccine performance in broiler study underlines need for surveillance
A whole-complex study of broiler breeders in Georgia found underwhelming infectious bronchitis vaccine performance – but with better surveillance and protocols, outcomes could be improved.
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Live vaccines are key to Salmonella-control programs — here’s why
Immune responses to Salmonella infection are complex, but vaccination has become a key component of multi-step control programs. A new review of evidence to date suggests that live vaccines have...
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On-site PCR testing could aid smart antibiotic use in mycoplasmosis treatment
Making use of polymerase chain reaction (PCR) testing on chicken farms can help tackle the problem of antibiotic overuse against mycoplasmosis in countries where this treatment approach is prevalent.
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Limiting E. coli transmission from hen to offspring
TOOLBOX: An interview with Henrik Christensen, PhD, DVSc, University of Copenhagen, on the effect of Poulvac E. coli on bird health, laying performance and hatching results.
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Turkey-farm study finds Salmonella Infantis prevalent
Research studying Salmonella across one turkey producer’s farms found Salmonella Infantis to be by far the dominant serotype.
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Replication, coverage vary among MD vaccination programs for long-lived birds
DISCOVERIES: Marek’s disease (MD) vaccination programs for breeders and layers can vary significantly in the replication and coverage they provide, a finding that should be considered when planning...
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Interaction of modified-live and recombinant vaccines shows potential against viral diseases
Adding a modified-live vaccine (MLV) to recombinant vaccine programs against three important viral pathogens in poultry production can have a positive impact on outcomes, according to field work by...
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Study shows modified-live vaccine can aid fight against Salmonella Infantis
New research shows that using a modified-live Salmonella Typhimurium (ST) vaccine helps protect broilers against Salmonella Infantis, the most commonly-isolated serotype in chicken parts and...
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Marek’s study could lead to new management strategies in poultry
New research has given scientists a greater understanding of the Marek’s disease virus (MDV) that could lead to new strategies for managing the widespread, immunosuppressive disease in poultry.
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Conventional, recombinant MD vaccination protocols compared in long-lived birds
TOOLBOX, Issue 34: An interview with Eduardo Muniz, DVM, Zoetis on research comparing conventional vaccine programs versus new protocols with vectored vaccines.
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E. coli vaccination reduces bacteria populations, increases antibiotic susceptibility
A modified-live E. coli vaccine helps reduce E. coli counts in broiler chickens and turkeys and can significantly increase susceptibility to commonly used antibiotics, according to new field...
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Four-year study highlights value of vaccinating turkeys against E.coli
Vaccinating turkeys against colibacillosis with the modified-live E. coli vaccine has economic and animal welfare benefits, according to a retrospective, 4-year study conducted on 37 French turkey...
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Targeted adjuvants may improve recombinant ILT vaccination immune response
Vaccination might be effective in controlling ILT in broilers, but recombinant vaccines might not always provide an adequate immune response, according to scientists at North Caroline State...
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IBDV linked to severe necrotic enteritis in broiler chickens
Broiler chickens exposed to infectious bursal disease virus are likely to develop more severe cases of the bacterial disease, necrotic enteritis, researchers in Canada have found.
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Early IBV infections in layers can increase cysts associated with false layer syndrome
The timing of infectious bronchitis virus (IBV) challenge in layers can impact the development of cysts associated with false layer syndrome, scientists at the University of Georgia have discovered.
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5 ways research aims to tackle poultry-sector challenges
Novel, science-based technologies will allow the poultry industry to get ahead of issues coming towards it.
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Gut microbiota changes linked to E. coli vaccination may support gut health, broiler immune response
DISCOVERIES, Issue 13: A recent study found that administering a live Escherichia coli vaccine by spray produced marked, consistent changes in the intestinal microbiota of broilers.
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Study: Larger particles in starter feed lead to better performance
Starter feed of larger particles consumed by young chicks is associated with better performance during the lifetime of broiler birds, according to a study conducted at Mississippi State University.
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Better management, biosecurity could mean lower Salmonella levels in NAE farms
New research has suggested that Salmonella levels in no-antibiotics-ever (NAE) poultry systems could be lower than those on conventional broiler farms.
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Temperature and air flow critical to broiler performance year-round
By Michael Czarick, Engineering Specialist, University of Georgia Department of Poultry Science
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E. coli vaccination in broilers: Is it worth the cost?
According to recent studies, E. coli vaccination may actually help broiler producers boost their bottom lines.
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False layer syndrome linked to early infectious bronchitis exposure
Research is increasingly linking false layer syndrome to early exposure to infectious bronchitis virus. The condition prevents laying hens from producing eggs, but birds display few outward signs of...
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NCSU: Enterococcus co-infection makes colibacillosis deadlier in poultry
Researchers from North Carolina State University have found that when a particular strain of Enterococcus is found alongside E. coli in cases of avian colibacillosis, there is a higher rate of...
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Consider predominance of AL-2 variants when planning IBDV vaccination program
The AL-2 family of variants is the predominant strain of infectious bursal disease virus (IBDV) circulating among US broiler flocks, according to a recent survey.
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Glutamine supplement shows promise in reducing necrotic enteritis
Supplementing poultry diets with glutamine could help reduce the severity of necrotic enteritis (NE), according to researchers.
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Researchers decode clues to Salmonella Infantis control
New research from Austria provides key regional insights into Salmonella Infantis, a foodborne pathogen that is closely linked with broiler farms and often resistant to antibiotics.
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German researchers: Poultry, pigs not susceptible to COVID-19
Scientists in Germany have confirmed that pigs and chickens are not susceptible to COVID-19.
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Failure of maternal antibodies to protect against E. coli infection highlights need for early protection
New studies in broiler chicks show that maternal antibodies to Escherichia coli do not prevent infection.
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US poultry vets: Disease control and food safety identified as future research priorities
Surveys carried out by the AAAP found veterinarians working across the broiler, egg and turkey sectors believe food safety should be a high-priority area for future research, alongside vaccine and...
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Report: US poultry producers slash use of medically important antimicrobials while shifting focus to disease prevention
US poultry producers dramatically decreased their use of medically important antimicrobials over a 5-year period ending in 2017, according to a new report released by Randall Singer, DVM, PhD,...
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Gene technology has potential to multiply vaccine benefits
Scientists in the UK have discovered a way to modify a Marek’s disease vaccination so that it could be potentially be used to protect against a number of significant poultry diseases.
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Deadly duo: Study shows link between E. maxima, Clostridium
New research by Callie McQuain, DVM, veterinarian and grad student at the University of Georgia, substantiates anecdotal field experience indicating that Eimeria maxima is the type of coccidia that...
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New Marek’s test helps ensure successful vaccination, biosecurity
A new test is helping producers in Europe better protect their flocks against Marek’s disease (MD).
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E. maxima linked to mortality in broilers vaccinated for coccidiosis
Eimeria maxima in broilers vaccinated against coccidiosis appears to be an important cause of mortality, according to the preliminary results of a study presented at the 2017 annual meeting of the...
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Optimizing diets could limit foot pad dermatitis outbreaks
Managing diets to improve litter quality could help limit incidence of foot pad dermatitis (FPD) in broiler chickens and turkeys, scientists say.
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E. coli vaccine reduced colibacillosis lesions and mortality in turkeys
A modified-live Escherichia coli vaccine for turkeys was demonstrated to be safe and effectively reduced the incidence of lesions and mortality due to colibacillosis, according to recent studies.
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Early feeding, housing may affect broiler response to immune challenges
Early feeding after hatch and the housing type can affect the response of broilers to immune challenges later in life, indicates a study from the Netherlands.
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Are there practical alternatives to ionophores?
Proponents of raising broilers without ionophores and other antibiotics have proposed putting more emphasis on farm management, biosecurity and alternatives to anticoccidials.
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Hens in enriched colony system appear more stressed, flighty
Hens in an enriched colony system were more stressed and flighty than conventionally caged birds in a study from Mississippi State and Texas A&M Universities.
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S. enteritidis shedding more frequent among hens in conventional cages
Fecal shedding of Salmonella enteritidis was significantly more frequent among experimentally infected laying hens in conventional cages compared to hens housed in enriched colony cages, indicates a...
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Broiler study shows challenges and potential of drug-free production
Broilers raised in a drug-free program had a higher feed-conversion ratio (FCR), decreased mean daily weight and decreased mean live marketing weight despite administration of antibiotic
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IBD V877 vaccine can break through maternal antibodies
A live infectious bursal disease (IBD) vaccine based on the V877 strain can override maternal antibodies, doesn’t revert to virulence and has limited interactions with other live vaccines.
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Canada studies find no links between ionophores, resistance of other antibiotics
One of the few studies about antibiotic resistance and ionophores in poultry was published by Canadian researchers in 2007 who found that isolates showing resistance to multiple antibiotics can be...
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High stocking density predisposes broilers to NE
High stocking density has adverse effects on broiler welfare and intestinal health and predisposes the birds to necrotic enteritis (NE), according to the results of an experiment conducted by...
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Reducing false positives pays in ELISA mycoplasma testing
Poultry producers should consider specificity when selecting a Mycoplasma ELISA test to avoid costs associated with false positives.
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What’s left if we lose antibiotics?
Bacterial resistance is developing quickly and many critically important drugs risk becoming obsolete. Disastrous consequences lie in wait therefore unless these drugs are used prudently.
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Broiler chicks show less tendon swelling, weight suppression in reovirus vaccine study
A recent study showed that broiler chicks receiving higher reovirus antibody levels from conventionally vaccinated hens had a lower incidence of tendon swelling and were protected from weight...
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Administration of a Salmonella Enteritidis to newly hatched broilers reduces colonisation and shedding of a Salmonella Enteritidis challenge strain
A new study in Belgium has revealed a strain of Salmonella Enteritidis which showed some promise to help reduce food-borne infections when given to chicks in the drinking water and was even more...
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Frequent Application of Litter Amendments in Broiler Houses During Grow-out on Bird Health, Production and Environment
A series of experiments at the University of Delaware show that frequent application of sodium bisulphate improved broiler production performance and foot pad quality and reduced ammonia emissions...
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Sericea lespedeza found ineffective for coccidiosis control in chickens
Sericea lespedeza (SL), a warm-season legume shown to help control coccidiosis in lambs, had no anticoccidial activity in chickens, according to a study conducted at the University of Arkansas.
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Field trials show practical, economic benefits of E. coli vaccine in broilers
Recent studies on two continents have demonstrated that a modified-live vaccine reduced losses from Escherichia coli in broilers, even when the disease challenge was strong.
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Antibiotic resistance revisited in recent media reports
Following the April 2014 World Health Organization (WHO) report warning of a “post-antibiotic era,” Current Biology published the findings of a new study on May 19, reports Influence Feed.
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Supplemental bacitracin reduces mortality, C. perfringens in broilers
Commercial broilers that received a bacitracin-supplemented diet had less Clostridium perfringens in their gut, according to researchers at Ohio State University.
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Methods of diagnosing enteric disease clarified
Diagnosing clostridial enteric disease in poultry remains a challenge — primarily because many clostridial species can be a normal inhabitant of the gut, which makes it difficult to determine their...
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Single dose of Poulvac IBMM+Ark protects long-lived broilers for at least 9 weeks
One dose of the live, attenuated vaccine Poulvac® IBMM+Ark effectively protected broilers against two infectious bronchitis (IB) strains for at least 9 weeks, a recent study shows.
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Organic raw poultry not necessarily safer
Organic raw poultry is not necessarily safer for consumption than conventionally raised poultry, indicates a study from the University of Tennessee.
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Research review: What’s new in poultry housing and equipment?
With animal welfare and the environmental aspects of food animal farming gaining more attention from the public and high feed prices focusing efforts on getting the best performance from poultry,...
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