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https://www.readbyqxmd.com/read/28933794/inhibitory-profiles-of-spices-against-free-and-protein-bound-heterocyclic-amines-of-roast-beef-patties-as-revealed-by-ultra-performance-liquid-chromatography-tandem-mass-spectrometry-and-principal-component-analysis
#1
Jing Chen, Zhiyong He, Fang Qin, Jie Chen, Dongsheng Cao, Fengxian Guo, Maomao Zeng
The effects of various levels of chili pepper, Sichuan pepper, and black pepper on the amounts of 17 heterocyclic amines (HAs) from seven categories of both free and protein-bound states in roast beef patties were assessed by ultra-performance liquid chromatography-tandem mass spectrometry combined with principal component analysis. Three groups of HA, including imidazopyridines (DMIP), imidazoquinoxalines (MeIQx and 4,8-MeIQx), and β-carbolines (norharman and harman), were detected and quantified in both their free and protein-bound states, whereas PhIP was detected only in its free state, and imidazoquinolines (IQ, IQ[4,5-b], and MeIQ), α-carbolines (AαC and MeAαC), and phenylpyridines (Phe-P-1) were detected only in their protein-bound states...
September 21, 2017: Food & Function
https://www.readbyqxmd.com/read/28927492/quantitative-detection-of-pork-contamination-in-cooked-meat-products-by-elisa
#2
Cortlandt P Thienes, Jongkit Masiri, Lora A Benoit, Brianda Barrios-Lopez, Santosh A Samuel, David P Cox, Anatoly P Dobritsa, Cesar Nadala, Mansour Samadpour
Recent news of many cases of adulteration of meats with pork has bolstered the need for a way to detect and quantify the unwanted contamination of pork in other meats. To address this need, Microbiologique, Inc. has produced a sandwich ELISA assay that can rapidly quantify the presence of pork in cooked horse, beef, chicken, goat, and lamb meats. We carried out a validation study and showed that this assay has an analytical sensitivity of 0.00014 and 0.00040% (w/v) for cooked and autoclaved pork, respectively, and an analytical range of quantitation of 0...
September 19, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28926989/tech-savvy-beef-cattle-how-heifers-respond-to-moving-virtual-fence-lines
#3
Dana L M Campbell, Jim M Lea, William J Farrer, Sally J Haynes, Caroline Lee
Global Positioning System (GPS)-based virtual fences offer the potential to improve the management of grazing animals. Prototype collar devices utilising patented virtual fencing algorithms were placed on six Angus heifers in a 6.15 hectare paddock. After a "no fence" period, sequential, shifting virtual fences restricted the animals to 40%, 60%, and 80% of the paddock area widthways and 50% lengthways across 22 days. Audio cues signaled the virtual boundary, and were paired with electrical stimuli if the animals continued forward into the boundary...
September 18, 2017: Animals: An Open Access Journal From MDPI
https://www.readbyqxmd.com/read/28926025/animal-health-and-price-transmission-along-livestock-supply-chains
#4
M Aragrande, M Canali
Animal health diseases can severely affect the food supply chain by causing variations in prices and market demand. Price transmission analysis reveals in what ways price variations are transmitted along the supply chain, and how supply chains of substitute products and different regional markets are also affected. In perfect markets, a price variation would be completely and instantaneously transmitted across the different levels of the supply chain: producers, the processing industry, retailers and consumers...
April 2017: Revue Scientifique et Technique
https://www.readbyqxmd.com/read/28926010/economic-assessment-of-an-emerging-disease-the-case-of-schmallenberg-virus-in-france
#5
A Waret-Szkuta, P Alarcon, B Hasler, J Rushton, F Corbière, D Raboisson
Schmallenberg virus (SBV) was first detected in 2011 in Germany and then in France in 2012. This study simulates the production of different ruminant systems in France and estimates, through partial budget analyses, the economic cost of SBV at the farm level, under two disease scenarios (a high-impact and low-impact scenario). A partial budget is used to evaluate the financial effect of incremental changes, and includes only resources or production that will be changed. In the high-impact scenario, the estimated impact of SBV ranged from €23 to €43 per cow per year and €19 to €37 per ewe per year...
April 2017: Revue Scientifique et Technique
https://www.readbyqxmd.com/read/28925340/british-escherichia-coli-o157-in-cattle-study-becs-to-determine-the-prevalence-of-e-coli-o157-in-herds-with-cattle-destined-for-the-food-chain
#6
M K Henry, S C Tongue, J Evans, C Webster, I J McKENDRICK, M Morgan, A Willett, A Reeves, R W Humphry, D L Gally, G J Gunn, M E Chase-Topping
Escherichia coli O157 are zoonotic bacteria for which cattle are an important reservoir. Prevalence estimates for E. coli O157 in British cattle for human consumption are over 10 years old. A new baseline is needed to inform current human health risk. The British E. coli O157 in Cattle Study (BECS) ran between September 2014 and November 2015 on 270 farms across Scotland and England & Wales. This is the first study to be conducted contemporaneously across Great Britain, thus enabling comparison between Scotland and England & Wales...
September 19, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28924154/a-dna-aptamer-efficiently-inhibits-the-infectivity-of-bovine-herpesvirus-1-by-blocking-viral-entry
#7
Jian Xu, Xixi Zhang, Shuanghai Zhou, Junjun Shen, Dawei Yang, Jing Wu, Xiaoyang Li, Meiling Li, Xiufen Huang, Joshua E Sealy, Munir Iqbal, Yongqing Li
Bovine herpesvirus 1 (BoHV-1) is an important pathogen of domestic and wild cattle responsible for major economic losses in dairy and beef industries throughout the world. Inhibition of viral entry plays a crucial role in the control of BoHV-1 infection and aptamers have been reported to inhibit viral replication. In this study, nine DNA aptamers that target BoHV-1 were generated using systemic evolution of ligands by exponential enrichment. Of the nine candidates, aptamer IBRV-A4 exhibited the highest affinity and specificity for BoHV-1, which bound to BoHV-1 with a Kd value of 3...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28922801/effect-of-severe-weather-events-on-the-shedding-of-shiga-toxigenic-escherichia-coli-in-slaughter-cattle-and-phenotype-of-serogroup-o157-isolates
#8
Kim Stanford, Tim Reuter, Susan J Bach, Linda Chui, Angela Ma, Cheyenne C Conrad, Renata Tostes, Tim A McAllister
High-event periods (HEPs) occur sporadically when beef carcasses and meat have episodes of acute contamination with Shiga toxin-producing Escherichia coli (STEC). In this study, severe weather events were investigated as catalysts for HEPs based on PCR and isolate prevalence of seven E. coli serogroups in slaughter cattle feces. Winter ambient temperatures with daily means 10.5oC warmer or 12.3°C colder than seasonal norms (-10.4°C) most altered STEC shedding. Fecal samples yielded increased proportions (P < 0...
September 1, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28922030/rapid-detection-and-classification-of-salmonella-enterica-shedding-in-feedlot-cattle-utilizing-the-roka-bioscience-atlas-salmonella-detection-assay-for-the-analysis-of-rectoanal-mucosal-swabs
#9
W Evan Chaney, Getahun E Agga, Scott V Nguyen, Terrance M Arthur, Joseph M Bosilevac, Erin Dreyling, Anantharama Rishi, Dayna Brichta-Harhay
With an increasing focus on preharvest food safety, rapid methods are required for the detection and quantification of foodborne pathogens such as Salmonella enterica in beef cattle. We validated the Atlas Salmonella Detection Assay (SEN), a nucleic acid amplification technology that targets Salmonella rRNA, for the qualitative detection of S. enterica with sample enrichment using immunomagnetic separation as a reference test, and we further evaluated its accuracy to predict pathogen load using SEN signal-to-cutoff (SCO) values from unenriched samples to classify animals as high or nonhigh shedders...
September 18, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28921940/attribution-of-human-infections-with-shiga-toxin-producing-escherichia-coli-stec-to-livestock-sources-and-identification-of-source-specific-risk-factors-the-netherlands-2010-2014
#10
L Mughini-Gras, W van Pelt, M van der Voort, M Heck, I Friesema, E Franz
Shiga toxin-producing Escherichia coli (STEC) is a zoonotic pathogen of public health concern whose sources and transmission routes are difficult to trace. Using a combined source attribution and case-control analysis, we determined the relative contributions of four putative livestock sources (cattle, small ruminants, pigs, poultry) to human STEC infections and their associated dietary, animal contact, temporal and socio-econo-demographic risk factors in the Netherlands in 2010/2011-2014. Dutch source data were supplemented with those from other European countries with similar STEC epidemiology...
September 17, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28920543/control-of-clinical-paratuberculosis-in-new-zealand-pastoral-livestock
#11
M Gautam, A Ridler, P R Wilson, C Heuer
This review summarises current control measures for clinical paratuberculosis (Johne's disease; JD) in New Zealand pastoral livestock. Most New Zealand sheep, deer, beef and dairy cattle herds and flocks are infected by Mycobacterium avium ssp. paratuberculosis (Map). Dairy cattle and deer are mostly infected with bovine (Type II), and sheep and beef cattle with ovine (Type I) strains. Control in all industries is voluntary. While control in sheep and beef cattle is ad hoc, the dairy and deer industries have developed resources to assist development of farm-specific programmes...
September 17, 2017: New Zealand Veterinary Journal
https://www.readbyqxmd.com/read/28919685/prevalence-of-listeria-monocytogenes-yersinia-enterocolitica-staphylococcusaureus-and-salmonella-enterica-typhimurium-in-meat-and-meat-products-using-multiplex-polymerase-chain-reaction
#12
C Latha, C J Anu, V J Ajaykumar, B Sunil
AIM: The objective of the study was to investigate the occurrence of Listeria monocytogenes, Yersinia enterocolitica, Staphylococcusaureus, and Salmonella enterica Typhimurium in meat and meat products using the multiplex polymerase chain reaction (PCR) method. MATERIALS AND METHODS: The assay combined an enrichment step in tryptic soy broth with yeast extract formulated for the simultaneous growth of target pathogens, DNA isolation and multiplex PCR. A total of 1134 samples including beef (n=349), chicken (n=325), pork (n=310), chevon (n=50), and meat products (n=100) were collected from different parts of Kerala, India...
August 2017: Veterinary World
https://www.readbyqxmd.com/read/28919035/development-of-a-fast-and-efficient-method-for-hepatitis-a-virus-concentration-from-green-onion
#13
Yan Zheng, Yuan Hu
Hepatitis A virus (HAV) can cause serious liver disease and even death. HAV outbreaks are associated with the consumption of raw or minimally processed produce, making it a major public health concern. Infections have occurred despite the fact that effective HAV vaccine has been available. Development of a rapid and sensitive HAV detection method is necessary for an investigation of an HAV outbreak. Detection of HAV is complicated by the lack of a reliable culture method. In addition, due to the low infectious dose of HAV, these methods must be very sensitive...
September 14, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28918551/bio-economic-evaluation-of-a-reduced-phosphorus-supplementation-strategy-for-a-cow-calf-system-in-brazil-a-case-study
#14
Samara P Lopes, Felipe Z Garcia, Vinícius C Souza, Diogo Fleury A Costa, Pedro Malafaia
Fertility, weight of calves at weaning, and the economic aspects of a breeding herd receiving mineral supplements containing 75 or 12.5 g of phosphorus (P)/kg were measured from 2013 to 2016. No differences in reproduction parameters or weight at weaning were found before and after the adoption of the new scheme of mineral supplementation. Before the study, the annual cost with the formula containing more P was equivalent to 29.3 weaned beef calves; after the P reduction, the annual cost was equivalent to 2...
September 16, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28918143/short-communication-estimating-lactation-curves-for-highly-inhomogeneous-milk-yield-data-of-an-f2-population-charolais-%C3%A3-german-holstein
#15
N Melzer, S Trißl, G Nürnberg
Fitting of lactation curves is a common tool to obtain the entire milk yield as well as to estimate the main curve characteristic (such as day of peak milk yield) for a lactation. These models are primarily designed for dairy cattle, but have been applied to nondairy cattle breeds and also for other species. In this study we considered milk yield data of 197 F2 crossbred cows of Charolais and German Holstein (founder breeds) for the first and the beginning of the second lactation. The F2 cows showed a high variability regarding the length of lactation, which varied between 7 and 406 d in milk for the first lactation...
September 13, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28914423/influences-of-nitrogen-fertilization-and-energy-supplementation-for-growth-perfomance-of-beef-cattle-on-alexander-grass
#16
Tiago Venturini, Luís Fernando Glasenapp de Menezes, Marcelo Marcos Montagner, Wagner Paris, Gean Rodrigo Schmitz, Marcos Luis Molinete
This study evaluated the influences of nitrogen fertilizer and energy supplementation cattle on the growth performance of beef cattle. This study was conducted at the Federal University of Technology of Paraná, Dois Vizinhos through continuous grazing on 6.3 ha, divided into nine paddocks. The treatments were: Alexander grass +100 kg ha(-1) of N (N100); Alexander grass + 100 kg ha(-1) of N + 0.5 kg per 100 kg of weight live supplementation of wheat bran (N100S); and Alexander grass +200 kg ha(-1) of N (N200), with an average herbage allowance of 10% for all treatments...
September 15, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28913881/effect-of-negative-dietary-cation-anion-differences-on-carcass-characteristics-and-beef-tenderness-of-japanese-black-steers
#17
Kyohei Ishida, Kazuo Hirano
Lowering dietary cation-anion differences (DCAD) can enhance responsiveness to Ca-homeostatic hormones and increase Ca availability, which might have potential to activate a Ca-dependent protease, calpain, and to enhance postmortem myofibrillar proteolysis. In this study, we investigated the effects of DCAD manipulation on calpain activity and beef tenderness in Japanese Black cattle which are characterized by their high marbling. Thirty-six Japanese Black steers were allotted to one of two treatments: (i) control (CON; DCAD +6...
September 15, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28913347/haplotypes-for-type-degree-and-rate-of-marbling-in-cattle-are-syntenic-with-human-muscular-dystrophy
#18
Sally S Lloyd, Edward J Steele, Jose L Valenzuela, Roger L Dawkins
Traditional analyses of a QTL on Bota 19 implicate a surfeit of candidates, but each is of marginal significance in explaining the deposition of healthy, low melting temperature fat within marbled muscle of Wagyu cattle. As an alternative approach, we have used genomic, multigenerational segregation to identify 14 conserved, ancestral 20 Mb haplotypes. These determine the degree and rate of marbling in Wagyu and other breeds of cattle. The melting temperature of intramuscular fat is highly heritable and traceable by haplotyping...
2017: International Journal of Genomics
https://www.readbyqxmd.com/read/28911637/safety-of-frozen-liver-for-human-consumption
#19
Ghada A K Kirrella, Azza M M Deeb, Reda Mohamed Ibrahim Abdallah
The objective of this study was to ensure and evaluate the safety of imported frozen beef liver traded in supermarkets of Kafr El-Sheikh Governorate, Egypt, through detection of Salmonella typhimurium, Salmonella enteritidies, Escherichia coli O157:H7, antibiotic residues, and aflatoxin B1 residue. Fifty samples of imported frozen liver were randomly collected from different shops at Kafr El-Sheikh Governorate for isolation of S. typhimurium, S. enteritidies, and E. coli O157:H7. The results revealed that for both microorganisms 4% of the examined samples presumed to contain Salmonella and E...
July 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28911636/novel-electrochemical-xanthine-biosensor-based-on-chitosan-polypyrrole-gold-nanoparticles-hybrid-bio-nanocomposite-platform
#20
Muamer Dervisevic, Esma Dervisevic, Emre Çevik, Mehmet Şenel
The aim of this study was the electrochemical detection of the adenosine-3-phosphate degradation product, xanthine, using a new xanthine biosensor based on a hybrid bio-nanocomposite platform which has been successfully employed in the evaluation of meat freshness. In the design of the amperometric xanthine biosensor, chitosan-polypyrrole-gold nanoparticles fabricated by an in situ chemical synthesis method on a glassy carbon electrode surface was used to enhance electron transfer and to provide good enzyme affinity...
July 2017: Journal of Food and Drug Analysis
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