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Poultry Science

Thu, 05/17/2018 - 20:00
ABSTRACTSalmonella enterica serovar Oranienburg (SO) was linked to a human salmonellosis outbreak in the Midwest in 2015 and 2016 from consumption of eggs. However, unlike Salmonella enterica serovar Enteritidis (SE), little is known regarding the potential of SO to colonize in laying hens and contaminate eggs. We used in vivo and in vitro models to evaluate tissue colonization and survival...
Thu, 05/17/2018 - 20:00
ABSTRACTThis study evaluated the preventive effect of the spontaneous oxidation of β-carotene (OxC-beta) in broiler chickens with necrotic enteritis by Clostridium perfringens taking into consideration various parameters including clinical signs, body weight, intestinal lesion severity, and bacterial enumeration. The mean body weight of the OxC-beta treatment groups increased significantly (P...
Sun, 05/13/2018 - 20:00
ABSTRACTThe present study was conducted to estimate the apparent prevalence of Salmonella spp. in free-ranging waterfowl that inhabitant Entre Ríos, Argentina, determine the antimicrobial resistance of the isolated, and compare the performance of two selective plating media used for Salmonella isolation. Five hundred ninety nine free-living waterfowl were sampled one time by cloacal swab from...
Thu, 05/10/2018 - 20:00
ABSTRACTDuck hepatitis A virus type 1 (DHAV-1) is one of the main pathogens of ducklings and causes a high mortality rate. Baicalin (BA) has potent antiviral effect, but the solubility is very poor. In order to increase the absorption, solubility, and pharmacological activity, the phospholipid complex was used to modify BA in present study. Therefore, BA phospholipid complex (BAPC) was prepared....
Thu, 05/10/2018 - 20:00
AbstractThis study investigated the presence and the level of Campylobacter spp. contamination in 41 thigh samples (with skin) and 37 skinless breast samples collected at the end of slaughter (T1) and after 10 day period at refrigeration temperature (4°C) (T2), corresponding to their commercial shelf life. The isolates were phenotypically classified as Campylobacter spp. and successively...
Wed, 05/09/2018 - 20:00
ABSTRACTThe objective of this study was to assess the quantitative prevalence, antibiotic resistance, and molecular subtyping pattern of Campylobacter isolates from chicken and duck products from poultry slaughterhouses in South Korea. A total of 240 chicken (n = 120) and duck (n = 120) carcass samples collected from 12 poultry slaughterhouses between June 2014 and February 2015 in 12 South...
Wed, 05/02/2018 - 20:00
ABSTRACTExtending the laying period of laying hens is beneficial for economic and sustainability purposes. Because vaccines were designed with a shorter laying period envisaged, it is unclear whether current Salmonella vaccines can provide sufficient levels of protection against infection at an older age. The purpose of this experiment was to determine the efficacy of early rearing vaccination...
Thu, 04/19/2018 - 20:00
ABSTRACTVertical integration of the broiler industry allows producers to combine different biosecurity and sanitation practices, housing technologies, and feeding regimens to improve food safety. The objectives of this study were to determine the antimicrobial resistance pattern of β-lactamase-producing E. coli and to compare the characteristics of E. coli recovered from 7 different integrated...
Thu, 04/19/2018 - 20:00
ABSTRACTThe interaction of 3 water sanitizers (sodium hypochlorite, iodine-polyvinylpyrrolidone, and citrate) utilized in poultry production on antibacterial activity and bioavailability of amoxicillin trihydrate (AMX) were studied. Sanitizers were mixed with AMX in prepared water, the resulting substances were regarded as amoxicillin-sanitizer products (ASP). First, the in vitro antibacterial...
Thu, 04/19/2018 - 20:00
ABSTRACTThis study evaluated the effects of Bacillus subtilis CGMCC 1.921 supplementation on the production performance, cecal microbiota and mucosal transcriptome of laying hens by 16s rRNA gene sequencing and RNA-seq. A total of 144 27-week-old Hy-Line Brown laying hens were allocated into two treatments, namely, a basal diet without additions (T0) and the basal diet supplemented with 1.0 × 108...
Mon, 04/16/2018 - 20:00
AbstractDrinking water for poultry is not subject to particular microbiological, chemical and physical requirements, thereby representing a potential transmission route for pathogenic microorganisms and contaminants and/or becoming unsuitable for water-administered medications. This study assessed the microbiological, chemical and physical drinking water quality of 28 turkey farms in North-...
Mon, 04/16/2018 - 20:00
AbstractThis study was carried out to evaluate the effectiveness of an alcoholic propolis extract (15%) as a disinfectant for Japanese quail (Coturnix coturnix japonica) hatching eggs. A total of 600 eggs were randomly divided into four experimental groups: 1) negative control (NC), without disinfection, 2) control (C), fumigated with formaldehyde gas, 3) (A), sprayed with 96% alcohol, and 4) (P...
Thu, 04/12/2018 - 20:00
ABSTRACTA study was conducted to evaluate the efficacy of fructooligosaccharides (FOS) in controlling the infection of Salmonella Enteritidis (SE) in White Leghorns. A total of 30 laying hens (white leghorns W-36) were challenged both orally and cloacally with approximately 108 colony-forming units of nalidxic acid resistant SE (SENAR) and divided into 3 treatments: 1) SENAR challenged + 0.0% FOS...
Tue, 04/10/2018 - 20:00
AbstractBacterial communication has become an increasingly studied topic aiming at the discovery of new products to aid the treatment of diseases for which conventional options do not work. The production of safe foods, free of pathogens, has been receiving increasing attention due to market demands for food products of high quality and free of residues. This study assessed the communication...
Tue, 04/10/2018 - 20:00
AbstractThis study was conducted to evaluate the protective efficacy of dietary Bacillus coagulans (B. coagulans) supplementation in birds receiving Salmonella enteritidis (SE). Two hundred and forty 1-day-old Cobb broilers were randomly assigned to 2 × 2 factorial arrangements of treatments with 2 levels of dietary B. coagulans (0 or 400 mg/kg) and 2 levels of SE challenge (0 or 1 × 109 SE...
Wed, 04/04/2018 - 20:00
ABSTRACTThe maintenance of integrity of the gastrointestinal tract is an important aspect for animal productivity, since it is able to absorb nutrients more efficiently and serves as a barrier against microorganisms. To control agents detrimental to intestinal integrity, growth-promoting antibiotics (AGP) are used, which reduce the number of toxin-producing microorganisms in the intestinal lumen...
Tue, 03/27/2018 - 20:00
ABSTRACTAvian leukosis virus subgroup K (ALV-K) is an emerging ALV tumor virus of chickens. We developed a SYBR green-based real-time polymerase chain reaction (PCR) assay for the rapid and economical detection of ALV-K in chicken flocks. The assay was specific for ALV-K and did not cross-react with other ALV subgroup or avian influenza virus, Newcastle disease virus, or Marek's Disease virus....
Mon, 03/26/2018 - 20:00
ABSTRACTSalmonella spp. are among the most common foodborne pathogens, and increase in the occurrence of antimicrobial drug-resistant Salmonella poses a severe risk to public health. The main objective of this study was to determine changes in Salmonella prevalence and their antimicrobial resistance on poultry farms following recommendations to changes in biosecurity practices. Four poultry farms...
Mon, 03/19/2018 - 20:00
AbstractThe future poultry nutritionist, veterinarian, and husbandryman will have many new regulatory requirements and consumer preferences to navigate in addition to their normal responsibility of raising birds in a cost-efficient and wholesome manner. New challenges include changes to antibiotic use, increased food safety regulations, and more concern over how birds are raised and how to...
Mon, 03/19/2018 - 20:00
AbstractChemical components of hop resins effectively inhibit the growth of L. monocytogenes in microbiological culture media. This study was conducted to investigate antilisterial activities of hop α- and β-acid in turkey slurry. Turkey slurries were inoculated with L. monocytogenes, formulated with hop α- or β-acid from 0 to 1,000 ppm, and incubated at 37°C for 24 h or at 7°C for 12 days....
Sun, 03/18/2018 - 20:00
ABSTRACTAnimal by-product rendering establishments are still relevant industries worldwide. Animal by-product meal safety is paramount to protect feed, animals, and the rest of the food chain from unwanted contamination. As microbiological contamination may arise from inadequate processing of slaughterhouse waste and deficiencies in good manufacturing practices within the rendering facilities, we...
Sun, 03/04/2018 - 19:00
AbstractThis study compared the efficacy of Pediococcus acidilactici, mannan-oligosaccharide, butyric acid, and their combination on growth performance and intestinal health in broiler chickens challenged with S. Typhimurium. Ross 308 male broilers (n = 420) were randomly assigned to one of the 6 treatments, resulting in 5 replicate pens of 14 chicks per treatment. The treatments included a...
Sun, 03/04/2018 - 19:00
AbstractConsumption of contaminated poultry products is the main source of human campylobacteriosis, for which Campylobacter jejuni is responsible for 90% of human cases. Although chickens are believed to be a main source of human exposure to C. jejuni, turkeys also contribute to cases of human infection. Little is known about the kinetics of C. jejuni intestinal colonization in turkeys, or best...
Wed, 02/28/2018 - 19:00
AbstractThe aim of this study was to evaluate the effects of dietary levels of xylanase on production performance, egg quality, nutrient digestibility, and excreta microbiota shedding of laying hens in a 12-week trial. Two-hundred-forty Hy-Line brown laying hens (44 wk old) were distributed according to a randomized block experimental design into one of 4 dietary treatments with 10 replicates of...
Sun, 02/18/2018 - 19:00
AbstractThe aim of this study was to evaluate the viability of Campylobacter spp. in frozen and chilled broiler carcasses using real-time PCR with propidium monoazide (PMA) pretreatment. Sixty broiler carcasses were collected: 30 frozen and 30 chilled. Each carcass was submitted to 2 real-time PCR protocols to detect and quantify Campylobacter spp.: one using pretreatment with PMA, which blocks...
Wed, 02/14/2018 - 19:00
AbstractReducing Campylobacter spp. carriage in poultry is challenging, but essential to control this major cause of human bacterial gastroenteritis worldwide. Although much is known about the mechanisms and route of Campylobacter spp. colonization in poultry, the literature is scarce on antibiotic-free solutions to combat Campylobacter spp. colonization in poultry. In vitro and in vivo studies...
Sun, 01/28/2018 - 19:00
AbstractMicrobial colonization of the intestinal tract of commercial poultry is highly variable, likely due to the fact that poults and chicks are hatched and raised without exposure to adult birds and their microbiota. In industrial poultry production, it is hypothesized that most of the microbiota is obtained through horizontal transmission from the environment and very little by maternal...
Fri, 01/19/2018 - 19:00
AbstractSalmonella is one of the major causative agents of foodborne infections. Salmonellosis becomes more dangerous when strains resistant to several antibiotics are found in food, especially in chicken, one of the primary transmission vehicles of this pathogen for humans. The present study aimed to estimate the occurrence of Salmonella in chicken carcasses from the state of Mato Grosso, Brazil...
Fri, 01/19/2018 - 19:00
AbstractVertical integration of the broiler industry allows producers to combine different biosecurity and sanitation practices, housing technologies, and feeding regimens to improve food safety. The purpose of this study was to investigate the prevalence of Staphylococcus aureus (S. aureus) and to characterize the antimicrobial-resistant isolates recovered from 7 different integrated broiler...
Wed, 01/17/2018 - 19:00
AbstractHatching eggs collected from resident broiler breeders at 48 wk of age were used to produce male and female chicks that were assigned sex separately to 96 new litter pens and fed either a 0 or 50 g/MT RFC (refined functional carbohydrate feed additive derived from yeast) diet. There were 24 replicate pens of 12 broilers each per diet per sex. Feed intake and BW were determined at 14, 28,...
Fri, 01/12/2018 - 19:00
AbstractSalmonella enterica serovar Heidelberg (American Type Culture Collection; ATCC 8326) was examined for the ability to adapt to the homologous stress of chlorine through exposure to increasing chlorine concentrations (25 ppm daily increments) in tryptic soy broth (TSB). The tested strain exhibited an acquired tolerance to chlorine in TSB with the tolerant cells growing in concentrations up...
Wed, 01/10/2018 - 19:00
AbstractFood safety of table eggs is vital since many pathogens can contaminate the unfertilized egg, leading to increased risk of foodborne illness for consumers. The eggshell cuticle is the first line of defense to restrict the entry of egg-associated pathogens, such as Salmonella Enteritidis. The thickness and completeness of coverage of the cuticle layer are heritable traits that are strongly...
Tue, 12/19/2017 - 19:00
AbstractThe present study was carried out to investigate the effects of stocking density, fumonisin B1 (FB), and mycotoxin binder (TB) on growth performance, bone quality, physiological stress indicators, and gut health in broiler chickens. Day-old Ross 308 male broiler chicks (n = 1,440/experiment) were randomly allocated to 72 floor pens in a 3 × 2 × 2 factorial arrangement, using 3 stocking...
Tue, 12/19/2017 - 19:00
AbstractCarotenoids have been used for many years as an added pigment to enhance egg yolk color. One such carotenoid, astaxanthin, has a strong antioxidant activity and is produced by several microorganisms, including the bacterium Paracoccus marcusii, which has shown promise to be used as a feed additive. Therefore, this study investigated the use of P. marcusii as a possible source of...
Tue, 12/19/2017 - 19:00
AbstractNumerous studies have indicated that yellow semen syndrome (YSS) of turkey is associated with the production of low semen quality, resulting in reduced fertility and hatchability. It is unknown at present if the etiology of YSS also could be linked to low-molecular weight metabolites. The aim of this study was to examine the metabolome of white and yellow seminal plasma of turkeys. Two...
Tue, 12/12/2017 - 19:00
AbstractThis study investigated bactericidal activity of 0.05 to 0.50% calcium oxide (CaO) against planktonic cells in tryptic soy broth (TSB) and biofilms of Listeria monocytogenes on eggshell surfaces. The bactericidal activity of CaO against planktonic cells and biofilms of L. monocytogens significantly (P < 0.05) increased log reductions with increasing concentrations of CaO. Exposure to 0...
Tue, 12/12/2017 - 19:00
AbstractThe microbiome of the broiler chicken gastrointestinal tract (GIT) has been extensively studied, and it has been amply demonstrated that it plays an important role in the health of the host, as it has a positive impact on the immune system, the physiology of the GIT, and productivity. Also, the microbiota is involved in reducing and preventing colonization by enteric pathogens through the...
Tue, 12/12/2017 - 19:00
AbstractCampylobacter jejuni (C. jejuni) is one of the main causes of human campylobacteriosis worldwide. Chicken is the main reservoir of C. jejuni. The cecum is the primary site of C. jejuni colonization. Our previous study has shown that the CLOCK gene is important to regulate the response to C. jejuni inoculation and has a cross-talking with immune-related genes. Correlation networks between...
Sat, 12/02/2017 - 00:00
AbstractThis study aimed to investigate the effect of yeast cell walls (YCW) on the growth performance, visceral lesions, intestinal integrity, enterotoxicity, and bacteria of broilers challenged with aflatoxin B1 (AF) and necrotic enteritis (NE) from 1 to 21 d of age. A total of 576 one-day-old broilers were assigned to a 2 × 2 × 2 design for diets containing AFB1 (0 or 40 μg/kg), NE (challenged...
Fri, 11/17/2017 - 00:00
AbstractDifferences in risk perceptions of public health and food safety hazards in various poultry husbandry systems by various stakeholder groups, may affect the acceptability of those husbandry systems. Therefore, the objective was to gain insight into risk perceptions of citizens, poultry farmers, and poultry veterinarians regarding food safety and public health hazards in poultry husbandry...
Thu, 11/09/2017 - 00:00
AbstractThree separate broiler Salmonella Typhimurium challenge experiments were conducted evaluating efficacy of formic and propionic acid feed supplements to suppress environmental and cecal Salmonella Typhimurium prevalence. In experiment 1, broilers were provided feed with 1 kg/ton formic acid or 5 kg/ton propionic acid feed additives or a basal control diet. At the day of placement, half of...
Wed, 11/08/2017 - 19:00
AbstractThree separate broiler Salmonella Typhimurium challenge experiments were conducted evaluating efficacy of formic and propionic acid feed supplements to suppress environmental and cecal Salmonella Typhimurium prevalence. In experiment 1, broilers were provided feed with 1 kg/ton formic acid or 5 kg/ton propionic acid feed additives or a basal control diet. At the day of placement, half of...
Fri, 11/03/2017 - 00:00
AbstractNecrotic enteritis, either in its clinical or sub-clinical form is known to cause massive economic losses in the broiler chicken industry. Currently, the use of in-feed antibiotics as growth promoters is discouraged. Therefore, mechanisms to control NE through diet include reduction of digesta viscosity, promotion of lower pH in the gastrointestinal tract (GIT) through acidification of...
Fri, 11/03/2017 - 00:00
AbstractOvergrowth of extended-spectrum β-lactamase (ESBL)-producing Escherichia coli (E. coli) on Campylobacter media prevents the latter's selective isolation, thereby making the improvement of Campylobacter-selective media necessary. We evaluated tazobactam (an ESBL inhibitor) to supplement Bolton enrichment broth (Tz-Bolton broth) for the selective isolation of Campylobacter in chicken...
Thu, 11/02/2017 - 20:00
AbstractNecrotic enteritis, either in its clinical or sub-clinical form is known to cause massive economic losses in the broiler chicken industry. Currently, the use of in-feed antibiotics as growth promoters is discouraged. Therefore, mechanisms to control NE through diet include reduction of digesta viscosity, promotion of lower pH in the gastrointestinal tract (GIT) through acidification of...
Thu, 11/02/2017 - 20:00
AbstractOvergrowth of extended-spectrum β-lactamase (ESBL)-producing Escherichia coli (E. coli) on Campylobacter media prevents the latter's selective isolation, thereby making the improvement of Campylobacter-selective media necessary. We evaluated tazobactam (an ESBL inhibitor) to supplement Bolton enrichment broth (Tz-Bolton broth) for the selective isolation of Campylobacter in chicken...
Wed, 10/25/2017 - 00:00
AbstractThe present study evaluated the microbiological properties of three probiotic candidate strains of lactic acid bacteria (LAB) (128; 131; CE11_2), their effect on intestinal epithelial permeability, and their ability to reduce intestinal colonization of Salmonella Typhimurium (ST) individually or as a batch culture in neonatal turkey poults. Isolates were characterized morphologically and...
Wed, 10/25/2017 - 00:00
AbstractSalmonella spp. is a foodborne pathogen that causes zoonotic disease worldwide. The aim of this study was to investigate the prevalence of antimicrobial resistance of Salmonella isolated from turkey farms in Taiwan. During the past 2 yr, 243 strains of Salmonella were isolated from 2,040 samples (11.9%) from turkey farms, including 32.5% (52/160) from the intestines of 12-day-old turkey...
Wed, 10/25/2017 - 00:00
AbstractA study was conducted to evaluate the influence of the purification of yeast cell wall (YCW) preparations on broiler performance and immunogenic and metabolic pathways under microbial challenge. A total of 240 (day old) chicks were distributed among two battery brooder units (48 pens; 5 birds/pen; 8 replicates/treatment). A basal starter diet was divided into 5 batches to create 6 dietary...
Wed, 10/25/2017 - 00:00
AbstractThe aim of this study was to evaluate the hepatoprotective effect of silymarin in diets contaminated or not with aflatoxin B1 (AFB1) on the productive performance and serum biochemical profile of Japanese quail (Coturnix coturnix japonica) in the laying phase. A total of 240 12-week-old Japanese quail was used in a completely randomized design in a 3 × 2 factorial scheme (additives x...

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