keyword
MENU ▼
Read by QxMD icon Read
search

Broiler breeder

keyword
https://www.readbyqxmd.com/read/27928940/epidemiological-and-pathological-investigation-of-fowl-aviadenovirus-serotypes-8b-and-11-isolated-from-chickens-with-inclusion-body-hepatitis-in-spain-2011-2013
#1
S Oliver-Ferrando, R Dolz, C Calderón, R Valle, R Rivas, M Pérez, M Biarnés, A Blanco, K Bertran, A Ramis, N Busquets, N Majó
Inclusion body hepatitis caused by different fowl aviadenovirus (FAdV) serotypes has been described in several countries in recent years. In Spain, from the spring of 2011 to 2013, an increased number of outbreaks in broiler and broiler breeder flocks from different regions occurred. The objectives of the present work were to carry out the molecular characterization of FAdV strains from Spanish inclusion body hepatitis cases and to study the pathogenicity and viral dynamics of these strains in specific pathogen-free (SPF) chickens...
December 8, 2016: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/27920198/effects-of-breeder-age-strain-and-eggshell-temperature-on-nutrient-metabolism-of-broiler-embryos
#2
A Nangsuay, R Meijerhof, I van den Anker, M J W Heetkamp, B Kemp, H van den Brand
Breeder age and broiler strain influence the availability of nutrients and oxygen through yolk size and eggshell conductance, and the effects of these egg characteristics on nutrient metabolism might be influenced by eggshell temperature (EST). This study aims to determine effects of breeder age, strain, and EST on nutrient metabolism of embryos. A study was designed as a 2 × 2 × 2 factorial arrangement using four batches of in total 4,464 hatching eggs of 2 flock ages at 29 to 30 wk (young) and 54 to 55 wk (old) of Ross 308 and Cobb 500...
December 5, 2016: Poultry Science
https://www.readbyqxmd.com/read/27902908/improved-performance-of-broilers-and-broiler-breeders-associated-with-an-amended-vaccination-program-against-reovirosis
#3
Peter De Herdt, Marlies Broeckx, Filip Van Driessche, Bart Vermeiren, Geert Van Den Abeele, Stefaan Van Gorp
A vertically integrated monitoring program was set up for breeders hatched in 2013 and their offspring to detect differences in performance related to the reovirus vaccination schedule. Within the same organization in Belgium, 17 breeder flocks were vaccinated with one dose of live and one dose of inactivated reovirus vaccine, while 14 flocks received two doses of inactivated vaccine without live priming. The hatchability of the eggs produced by these birds was examined. Further, the daily growth, feed conversion, mortality, slaughterhouse condemnation, production index, and antibiotic use were monitored in 110 broiler flocks derived from the breeders...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27902905/pathogenicity-of-genome-reassortant-infectious-bursal-disease-viruses-in-chickens-and-turkeys
#4
Daral J Jackwood, Simone T Stoute, Beate M Crossley
Infectious bursal disease virus (IBDV) contains two genome segments (segment A/segment B) that can reassort among the viruses. Reassortant IBDVs have been identified in several countries including the United States. These reassortant viruses usually include at least one genome segment from a very virulent (vv)IBDV strain. In vivo virulence of six reassortant IBDV from the United States was assessed relative to the virulence of three frequently described IBDV pathotypes: vvIBDV (rB strain), classic virulent (cv)IBDV (STC strain), and subclinical (sc)IBDV (Del-E strain)...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27902904/infection-with-some-infectious-bursal-disease-virus-pathotypes-produces-virus-in-chicken-muscle-tissue-and-the-role-of-humoral-immunity-as-a-mitigation-strategy
#5
Mariana Sá E Silva, Kateri Bertran, Kira Moresco, Daral J Jackwood, David E Swayne
Infectious bursal disease virus (IBDV) causes important economic losses and negatively affects global trade in poultry and poultry products. This study determined the presence of IBDV in primary lymphoid tissues and muscle tissue of infected broilers and the role of vaccination as a mitigation strategy. In the first study, specific-pathogen-free (SPF) broiler chickens were challenged with STC (classical [cIBDV]), Indiana (variant [varIBDV]), rA (very virulent [vvIBDV]), or Ohio (serotype 2, avirulent) IBDV...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27890044/effect-of-dietary-manganese-on-antioxidant-status-and-expressions-of-heat-shock-proteins-and-factors-in-tissues-of-laying-broiler-breeders-under-normal-and-high-environmental-temperatures
#6
Yong-Wen Zhu, Lin Lu, Wen-Xiang Li, Li-Yang Zhang, Cheng Ji, Xi Lin, Hsiao-Ching Liu, Jack Odle, Xu-Gang Luo
To investigate the effect of Mn on antioxidant status and on the expressions of heat shock proteins/factors in tissues of laying broiler breeders subjected to heat challenge, we used a completely randomised design (n 6) with a factorial arrangement of 2 environmental temperatures (normal, 21±1°C, and high, 32±1°C)×3 dietary Mn treatments (a Mn-unsupplemented basal diet (CON), or a basal diet supplemented with 120 mg Mn/kg diet, either as inorganic Mn sulphate (iMn) or as organic Mn proteinate (oMn)). There were no interactions (P>0·10) between environmental temperature and dietary Mn in any of the measured indices...
November 28, 2016: British Journal of Nutrition
https://www.readbyqxmd.com/read/27876045/seroprevalence-of-avian-hepatitis-e-virus-and-avian-leucosis-virus-subgroup-j-in-chicken-flocks-with-hepatitis-syndrome-china
#7
Yani Sun, Taofeng Du, Baoyuan Liu, Shahid Faraz Syed, Yiyang Chen, Huixia Li, Xinjie Wang, Gaiping Zhang, En-Min Zhou, Qin Zhao
BACKGROUND: From 2014 to 2015 in China, many broiler breeder and layer hen flocks exhibited a decrease in egg production and some chickens developed hepatitis syndrome including hepatomegaly, hepatic necrosis and hemorrhage. Avian hepatitis E virus (HEV) and avian leucosis virus subgroup J (ALV-J) both cause decreasing in egg production, hepatomegaly and hepatic hemorrhage in broiler breeder and layer hens. In the study, the seroprevalence of avian HEV and ALV-J in these flocks emerging the disease from Shandong and Shaanxi provinces were investigated...
November 22, 2016: BMC Veterinary Research
https://www.readbyqxmd.com/read/27871330/age-is-not-a-determinant-factor-in-susceptibility-of-broilers-to-h5n2-clade-2-3-4-4-high-pathogenicity-avian-influenza-virus
#8
Kateri Bertran, Dong-Hun Lee, Charles Balzli, Mary J Pantin-Jackwood, Erica Spackman, David E Swayne
In 2014-2015, the US experienced an unprecedented outbreak of H5 clade 2.3.4.4 highly pathogenic avian influenza (HPAI) virus. The H5N2 HPAI virus outbreak in the Midwest in 2015 affected commercial turkey and layer farms, but not broiler farms. To assess any potential genetic resistance of broilers and/or age-related effects, we investigated the pathogenesis and transmission of A/turkey/Minnesota/12582/2015 (H5N2) (Tk/MN/15) virus in commercial 5-week-old broilers, 8-week-old broilers, and >30-week-old broiler breeders...
November 21, 2016: Veterinary Research
https://www.readbyqxmd.com/read/27862400/optimal-in-feed-amino-acid-ratio-for-broiler-breeder-hens-based-on-deletion-studies
#9
J C P Dorigam, N K Sakomura, M F Sarcinelli, C A Gonçalves, M B de Lima, N J Peruzzi
An ideal amino acid ratio (IAAR) for breeder hens is needed for maximum nitrogen retention (NR) taking into account nitrogen deposition in body (NDB ), feathers (NDF ) and egg mass (NEM) to improve dietary protein efficiency. Thus, the aim of this study was to apply the deletion method to derive the IAAR for broiler breeder hens. The nitrogen balance trials were performed from 31 to 35 weeks and from 46 to 50 weeks. Twelve treatments with eight replicates and one hen per cage were used. A balanced diet (BD) was formulated to meet the requirement of all nutrients...
November 16, 2016: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/27738123/the-effect-of-four-different-feeding-regimens-from-rearing-period-to-sexual-maturity-on-breast-muscle-protein-turnover-in-broiler-breeder-parent-stock
#10
Karen Vignale, Justina V Caldas, Judy A England, Nirun Boonsinchai, Phiphob Sodsee, Monticha Putsakum, Erik D Pollock, Sami Dridi, Craig N Coon
A study was conducted to evaluate the effect of four different feeding regimens on breast muscle protein turnover in broiler breeder Cobb-500 parent stock (PS) pullets and breeder hens. The four feeding regimens based on BW curves utilized for the study were as follows: Everyday feeding (STD-ED) (Cobb Standard BW curve), skip-a-day feeding (STD-SKIP) (Cobb Standard BW curve), lighter BW (LBW-SKIP) (BW curve 20% under), and heavier BW (HBW-SKIP) (BW curve 20% over). Each feeding regimen was provided to pullets from 4 wk to 21 wk of age...
October 12, 2016: Poultry Science
https://www.readbyqxmd.com/read/27726764/preharvest-food-safety-in-broiler-chicken-production
#11
Walid Q Alali, Charles L Hofacre
Preharvest food safety in broiler production is a systematic approach to control the introduction, propagation, and dissemination of Salmonella and Campylobacter from breeder flocks to the end of their progeny (broilers) life cycle. New and revised more stringent performance standards for these pathogens at the processing plant level require continuous evaluation of the preharvest management practices and intervention strategies used by the poultry industry. The implementation of stricter biosecurity plans, vaccination of breeder flocks for Salmonella, and usage of feed that is free of animal by-products are some of the measures recommended to control the pathogens...
August 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/27712660/effect-of-cyclical-cold-stress-during-embryonic-development-on-aspects-of-physiological-responses-and-hsp70-gene-expression-of-chicks
#12
Keyvan Aminoroaya, Ali Asghar Sadeghi, Zarbakht Ansari-Pirsaraei, Nasser Kashan
The objective of the present study was to evaluate the effects of cyclical lower incubation temperature at different embryonic ages on the hatchability, body and organs weights, thyroid hormones, and liver HSP70 gene expression of newly hatched chicks. In a completely randomized design, fertile eggs of a broiler breeder (34 weeks of age) were assigned to three treatment groups with six replicates and 145 eggs per each. The treatment groups were as: control group (C) that eggs were incubated at 37.6°C during the whole incubation period; incubation temperature was decreased to 36°C for 3h per day at embryonic age from 12 to 14 (T1); and incubation temperature was decreased to 36°C for 3h per day at embryonic age from 15 to 17 (T2)...
October 2016: Journal of Thermal Biology
https://www.readbyqxmd.com/read/27699969/monitoring-salmonella-campylobacter-escherichia-coli-and-staphylococcus-aureus-in-traditional-free-range-label-rouge-broiler-production-a-23-year-survey-program
#13
Gilles Salvat, Marie Guyot, Juliette Protino
AIM: "Label Rouge" broiler free-range carcasses have been monitored since 1991, and broiler flocks since 2010, for contamination by the main foodborne zoonotic bacteria. MATERIAL AND METHODS: Initially the monitoring plan mainly focused on the surveillance of Salmonella, and on indicators of the overall microbiological quality of free-range broiler carcasses such as S. aureus and coliforms, but was extended in 2007 to include Campylobacter enumeration on carcasses and in 2010 to Salmonella in the environment of live birds...
October 4, 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/27688054/detecting-reproductive-system-abnormalities-of-broiler-breeder-roosters-at-different-ages
#14
M A Lagares, R Ecco, Nrs Martins, Ljc Lara, Jsr Rocha, Dar Vilela, V M Barbosa, P F Mantovani, Jfv Braga, I S Preis, V A Gheller, P C Cardeal, N C Baião
The objective of this study was to detect the reasons of rooster's fertility decrease at 50 weeks of age. Therefore, the reproductive system of broiler breeder roosters was laparoscopic, macroscopic and histopathology evaluated, and a comparison of the anatomical aspect with the sperm analysis and birds' age was realized. Cobb roosters (n = 59) were distributed into two groups (30 and 50 weeks). Evaluations were performed with laparoscopy, macroscopy and histopathology, and seminal quality, blood serum testosterone concentration and weight were also determined...
September 30, 2016: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/27663370/circulating-strains-of-variant-infectious-bursal-disease-virus-may-pose-a-challenge-for-antibiotic-free-chicken-farming-in-canada
#15
Shanika Kurukulsuriya, Khawaja Ashfaque Ahmed, Davor Ojkic, Thushari Gunawardana, Ashish Gupta, Kalhari Goonewardene, Ruwani Karunaratne, Shelly Popowich, Philip Willson, Suresh K Tikoo, Susantha Gomis
Antibiotic-free and safe animal products are most desirable among consumers. However, ensuring safe poultry products is a challenging task when the chicken immune system is compromised. Infectious bursal disease virus (IBDV) causes immunosuppression and predisposes chickens to secondary infections. Breeder vaccination against IBDV is routinely practiced for producing chicks with maternally-derived antibody (MAb) to prevent infection in newly hatched chicks. The majority of IBDV circulating in Canadian farms are variant strains (vIBDV)...
October 2016: Research in Veterinary Science
https://www.readbyqxmd.com/read/27613855/the-effect-of-maternal-canthaxanthin-supplementation-and-hen-age-on-breeder-performance-early-chick-traits-and-indices-of-innate-immune-function
#16
M L Johnson-Dahl, M J Zuidhof, D R Korver
Hen age and nutrition influence chick innate immunity. The immunomodulatory antioxidant carotenoid canthaxanthin is transferred from the hen diet to the egg. Antioxidants could protect the chick from bactericidal oxidative species produced by the immune system. Broiler breeder hen diets were supplemented with 0 (Control), 6 (Low), or 12 (High) mg/kg canthaxanthin. Chick early growth and ex vivo innate immunity were measured at 31 to 33 (Early), 45 to 47 (Mid), and 57 to 59 (Late) wk of hen age. Escherichia coli (E...
September 9, 2016: Poultry Science
https://www.readbyqxmd.com/read/27610727/efficacy-of-various-hvt-vaccines-conventional-and-recombinant-against-marek-s-disease-in-broiler-chickens-effect-of-dose-and-age-of-vaccination
#17
I M Gimeno, A L Cortes, N Faiz, T Villalobos, H Badillo, T Barbosa
Herpesvirus of turkeys (HVT) has been successfully used as a Marek's disease (MD) vaccine for more than 40 yr. Either alone (broiler chickens) or in combination with vaccines of other serotypes (broilers, broiler breeders, and layers), HVT is used worldwide. In recent years, several vector vaccines based on HVT (rHVT) have been developed. At present, there are both conventional HVT and rHVTs in the market, and it is unknown if all of them confer the same level of protection against MD. The objective of this study was to further characterize the protection conferred by two conventional HVTs (HVT-A and HVT-B) and three recombinant HVTs (rHVT-B, rHVT-C, and rHVT-D) against MD in broiler chickens...
September 2016: Avian Diseases
https://www.readbyqxmd.com/read/27610719/efficacy-of-recombinant-hvt-ibd-vaccines-administered-to-broiler-chicks-from-a-single-breeder-flock-at-30-and-60-weeks-of-age
#18
Jack Gelb, Daral J Jackwood, Erin M Brannick, Brian S Ladman
The efficacy of commercially available recombinant herpesvirus of turkeys-infectious bursal disease (rHVT-IBD) virus vaccines was studied in broiler chickens derived from an IBDV-vaccinated breeder flock at 30 wk of age (Trial 1) and 60 wk of age (Trial 2). In parallel, specific-pathogen-free (SPF) white leghorn chickens were used to evaluate vaccine efficacy to control for the effects of maternally derived antibodies (MDA) associated with the broiler chickens. Broilers and SPF leghorns were vaccinated subcutaneously in the neck at 1 day of age with Vaxxitek® HVT+IBD or Vectormune® HVT-IBD vaccines and were placed in isolators...
September 2016: Avian Diseases
https://www.readbyqxmd.com/read/27610717/morphometric-documentation-of-a-high-prevalence-of-left-ventricular-dilated-cardiomyopathy-in-both-clinically-normal-and-cyanotic-mature-commercial-broiler-breeder-roosters-with-comparisons-to-market-age-broilers
#19
Floyd D Wilson, Danny L Magee, Kelli H Jones, Erica Baravik-Munsell, Timothy S Cummings, Robert W Wills, Lanny W Pace
Previous studies documented the common occurrence of transitory cyanosis and echocardiographic aortic insufficiency in mature commercial broiler breeder roosters. During further investigations, we observed a high prevalence of hearts exhibiting extensive dilation of the left ventricle chamber compatible with dilated left ventricular cardiomyopathy present in both cyanotic and normal subpopulations. We conducted quantitative studies focused on documentation of cardiac ventricle parameters by using simple gross morphometric methods performed on formalin-fixed hearts obtained from both clinically normal roosters and those exhibiting variable transitory cyanosis, echocardiographic aortic insufficiency, or both...
September 2016: Avian Diseases
https://www.readbyqxmd.com/read/27609806/viral-proliferation-and-expression-of-tumor-related-gene-in-different-chicken-embryo-fibroblasts-infected-with-different-tumorigenic-phenotypes-of-avian-leukosis-virus-subgroup-j
#20
Yajin Qu, Litao Liu, Yujuan Niu, Yue Qu, Ning Li, Wei Sun, Chuanwei Lv, Pengfei Wang, Guihua Zhang, Sidang Liu
Subgroup J avian leukosis virus (ALV-J) causes a neoplastic disease in infected chickens. The ALV-J strain NX0101, which was isolated from broiler breeders in 2001, mainly induced formation of myeloid cell tumors. However, strain HN10PY01, which was recently isolated from laying hens, mainly induces formation of myeloid cell tumors and hemangioma. To identify the molecular pathological mechanism underlying changes in host susceptibility and tumor classification induced by these two types of ALV-J strains, chicken embryo fibroblasts derived from chickens with different genetic backgrounds (broiler breeders and laying hens) and an immortalized chicken embryo fibroblasts (DF-1) were prepared and infected with strain NX0101 or HN10PY01, respectively...
October 1, 2016: Poultry Science
keyword
keyword
68799
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"