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https://www.readbyqxmd.com/read/29786853/cysteamine-modified-gold-nanoparticles-as-a-colorimetric-sensor-for-the-rapid-detection-of-gentamicin
#1
Joshua C Gukowsky, Chen Tan, Zexiang Han, Lili He
A simple, rapid, and specific colorimetric method for gentamicin detection using cysteamine-modified gold nanoparticles (cys-AuNPs) has been developed. The maximum residue limits of gentamicin allowed in foods are typically below 100 nM, so an effective detection method for low concentrations of the drug is required. The aggregation of gold nanoparticles (AuNPs) was used as the basis for this method, and adding cysteamine to the AuNPs helped to enhance their aggregative abilities. The cys-AuNPs are capable of detecting gentamicin concentrations as low as 12...
May 22, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29776460/validation-of-the-betastar-%C3%A2-advanced-for-beta-lactams-test-kit-for-the-screening-of-bulk-tank-and-tanker-truck-milks-for-the-presence-of-beta-lactam-drug-residues
#2
Andrew Denhartigh, Lindsay Reynolds, Katherine Palmer, Frank Klein, Jennifer Rice, John J Rejman
A validation study was conducted for an immunochromatographic method (BetaStar® Advanced for Beta-lactams) for the detection of beta-lactam residues in raw, commingled bovine milk. The assay detected amoxicillin, ampicillin, cloxacillin, penicillin, cephapirin, and ceftiofur below the U.S. Food and Drug Administration tolerance levels but above the maximum sensitivity thresholds established by the National Conference on Interstate Milk Shipments. The results of internal and independent laboratory dose-response studies employing spiked samples were in agreement...
May 18, 2018: Journal of AOAC International
https://www.readbyqxmd.com/read/29763680/risk-assessment-of-fluoroquinolones-from-poultry-muscle-consumption-comparing-healthy-adult-and-pre-school-populations
#3
André M P T Pereira, Liliana J G Silva, Jéssica Rodrigues, Celeste Lino, Angelina Pena
Antibiotics, especially fluoroquinolones (FQs), have been largely used in animal husbandry namely poultry production. Therefore, this study aimed to identify, quantify and estimate the daily intake for adult and 3-year-old populations of the FQs norfloxacin (NOR), ciprofloxacin (CIP) and enrofloxacin (ENR) through poultry muscle consumption. The results showed detection frequencies of 78% and 62% in supermarket and school canteen samples, respectively. Of the 182 analysed samples, 4 did not comply with ENR maximum residue level (MRL), and 9 were contaminated with NOR, not allowed as a veterinary medicine of food-producing animals...
May 12, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29732489/the-use-of-antibiotics-in-cattle-in-north-east-benin-pharmaceutical-inventory-and-risk-practices-of-cattle-breeders
#4
S R Dognon, N Antoine-Moussiaux, C Douny, P Gustin, N Moula, M L Scippo, A K I Youssao
This study's aim is to inventory antibiotics used in cattle in North-East Benin and assess risk practices that could be the cause of both food chain contamination by antibiotic residues and selection of antibiotic-resistant bacteria in animals and humans. A survey was conducted among 98 cattle breeders in the districts of Banikoara, Kandi, Bembereke, and Kalale in North Benin. Semi-structured interviews were conducted, covering breeder status, breeding system, and antibiotic use. Multiple correspondence analysis and hierarchical classification analysis were conducted to establish a breeder typology...
May 7, 2018: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/29729861/on-line-coupling-of-hydrophilic-ionic-liquids-based-polymer-monolith-microextraction-to-capillary-liquid-chromatography-with-amperometric-detection-an-ultrasensitive-residue-analysis-method-for-glycopeptide-antibiotics
#5
Yanxia Tang, Ning Zhang, Bingyu Zhang, Xiaoyun Lei, Xiaoping Wu
A hydrophilic ionic liquids based polymer monolith microextraction (PMME) column (poly(ionic liquid-co-hydroxyethyl methacrylate-co-ethylene dimethacrylate); poly(IL-co-HEMA-co-EDMA)) was prepared for the first time in a capillary and utilized in PMME for the enrichment of glycopeptide antibiotics (GAs), followed by the online coupling analysis of capillary liquid chromatography with amperometric detection (cLC-AD). The prepared monolith exhibited large through pores and good storage stability, as well as a selective extraction machanism for GAs that was attributed to the hydrogen bonding, hydrophilic, electrostatic and π-π interactions between GAs and the imidazolium cations or hydroxyl groups on the surface of absorbent...
April 30, 2018: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29709830/enzyme-and-label-free-electrochemical-aptasensor-for-kanamycin-detection-based-on-double-stir-bar-assisted-toehold-mediated-strand-displacement-reaction-for-dual-signal-amplification
#6
Feng Hong, Xixue Chen, Yuting Cao, Youren Dong, Dazhen Wu, Futao Hu, Ning Gan
It is critically important to detect antibiotic residues for monitoring food safety. In this study, an enzyme- and label-free electrochemical aptasensor for antibiotics, with kanamycin (Kana) as a typical analyte, was developed based on a double stir bar-assisted toehold-mediated strand displacement reaction (dSB-TMSDR) for dual-signal amplification. First, we modified two gold electrodes (E-1 and E-2) with different DNA probes (S1/S2 hybrid probe in E-1 and DNA fuel strand S3 in E-2). In the presence of Kana, an S1/S2 probe can be disassembled from E-1 to form an S2/Kana complex in supernatant...
April 9, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29665886/antimicrobial-resistance-from-basic-science-to-translational-innovation
#7
Jun Lin
The rise in antimicrobial resistance (AMR) poses a major threat to animal agriculture and human health. To summarize and update current and emerging AMR issues that are significant for animal health and food safety, this issue presents a virtual AMR symposium consisting of seven review papers. These reviews cover a newly described AMR mechanism in Campylobacter, effects of AMR and microbiome on Campylobacter infection, plasmid-mediated colistin resistance in food-producing animals, the impact of point source or antibiotic residues on the environmental resistome, and potential factors influencing horizontal gene transfer in the intestines of food animals...
December 2017: Animal Health Research Reviews
https://www.readbyqxmd.com/read/29649735/a-review-of-analytical-procedures-for-the-simultaneous-determination-of-medically-important-veterinary-antibiotics-in-environmental-water-sample-preparation-liquid-chromatography-and-mass-spectrometry
#8
REVIEW
Chansik Kim, Hong-Duck Ryu, Eu Gene Chung, Yongseok Kim, Jae-Kwan Lee
Medically important (MI) antibiotics are defined by the United States Food and Drug Administration as drugs containing certain active antimicrobial ingredients that are used for the treatment of human diseases or enteric pathogens causing food-borne diseases. The presence of MI antibiotic residues in environmental water is a major concern for both aquatic ecosystems and public health, particularly because of their potential to contribute to the development of antimicrobial-resistant microorganisms. In this article, we present a review of global trends in the sales of veterinary MI antibiotics and the analytical methodologies used for the simultaneous determination of antibiotic residues in environmental water...
April 9, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29615380/-antibioticscout-ch-decision-support-for-the-prudent-use-of-antimicrobials-application-in-cattle
#9
R Peter, C Müntener, D Demuth, D Heim, F Stucki, M Mevissen, C Gerspach, M Kaske, A Steiner, M Meylan, M Bodmer, G Schüpbach-Regula, M Feldmann, H Naegeli
The administration of antibiotics in livestock has been criticized for many years, in particular because of an inappropriate use and the appearance of antibiotic residues in the environment, which can promote the emergence and spread of resistant bacteria. However, antibiotics are essential for the successful and sustainable control of bacterial pathogens. With the aim of optimizing the use of antibiotics in food animals and minimizing the prevalence of resistant bacteria, AntibioticScout. ch provides a decision aid for the prudent use of antimicrobial drugs...
April 2018: Schweizer Archiv Für Tierheilkunde
https://www.readbyqxmd.com/read/29605795/acute-and-chronic-toxicity-assessment-of-benzylpenicillin-g-residue-in-heat-treated-animal-food-products
#10
Cheng Cui, Xiang Zhang, Yang Wang, Shiying Lu, Huijun Lu, Qi Hui, Waqas Ahmad, Yan Cai, Xilin Liu, Lingjiu Liu, Fengfeng Shi, Yanyan Liu, Ke Zhao, FeiFei Zhai, Yangzhen Xiang, Pan Hu, Yansong Li, Honglin Ren, Ningyi Jin, Zengshan Liu
The current level of penicillin use and its persisting residue in livestock is potentially concerning; the toxicity of penicillin residue in heat-treated animal food products (HAFP) is yet to be elucidated. In this study, the acute and chronic toxicity of benzylpenicillin G (BPG) residue in HAFP was investigated in a mouse model. The calculated LD50 of BPG heated to cooking temperature (BPHCT) was 933.04 mg kg-1 [b.w.] intraperitoneally corresponding to 3.75 times lower than its prototype. Mice fed on the experimental diet containing heat-treated beef with high BPG levels for 6 months displayed a reduction in body weight and altered serum values indicating for liver and renal function...
March 14, 2018: Chemosphere
https://www.readbyqxmd.com/read/29601469/antibiotic-use-in-agriculture-and-its-consequential-resistance-in-environmental-sources-potential-public-health-implications
#11
REVIEW
Christy Manyi-Loh, Sampson Mamphweli, Edson Meyer, Anthony Okoh
Due to the increased demand of animal protein in developing countries, intensive farming is instigated, which results in antibiotic residues in animal-derived products, and eventually, antibiotic resistance. Antibiotic resistance is of great public health concern because the antibiotic-resistant bacteria associated with the animals may be pathogenic to humans, easily transmitted to humans via food chains, and widely disseminated in the environment via animal wastes. These may cause complicated, untreatable, and prolonged infections in humans, leading to higher healthcare cost and sometimes death...
March 30, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29567225/analysis-of-veterinary-drug-residue-monitoring-results-for-commercial-livestock-products-in-taiwan-between-2011-and-2015
#12
Hsin-Chun Lee, Chi-Min Chen, Jen-Ting Wei, Hsiu-Yi Chiu
Antibiotics have been widely used in the treatment of livestock diseases. However, the emergence of issues related to drug resistance prompted governments to enact a series of laws regulating the use of antibiotics in livestock. Following control of the problem of drug resistant bacteria, public attention has shifted to the recurring incidence of human health and safety issues caused by residual veterinary drugs in livestock products. To guarantee the safety and hygiene of meat, milk, and eggs from food-producing animals, governments and relevant agencies established laws and regulations for the use of veterinary drugs...
April 2018: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/29557339/antibiotic-residues-in-milk-from-three-popular-kenyan-milk-vending-machines
#13
Amos Kosgey, Anakalo Shitandi, Jason W Marion
Milk vending machines (MVMs) are growing in popularity in Kenya and worldwide. Milk vending machines dispense varying quantities of locally sourced, pasteurized milk. The Kenya Dairy Board has a regulatory framework, but surveillance is weak because of several factors. Milk vending machines' milk is not routinely screened for antibiotics, thereby increasing potential for antibiotic misuse. To investigate, a total of 80 milk samples from four commercial providers ( N = 25), street vendors ( N = 21), and three MVMs ( N = 34) were collected and screened in Eldoret, Kenya...
March 19, 2018: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29537307/antibiotic-residues-in-chicken-meat-global-prevalence-threats-and-decontamination-strategies-a-review
#14
Khurram Muaz, Muhammad Riaz, Saeed Akhtar, Sungkwon Park, Amir Ismail
Poultry production is among the most rapidly growing industries around the globe, and poultry is one of the major sources of meat. Poultry farmers use disease preventive and growth promoter antibiotics for faster growth of chickens in the shortest possible time to increase the rate of feed assimilation and to lower the incidence of mortality caused by a pathogen attack. Antibiotics may result in dysfunctionality of beneficial gut microbiota and increase resistance among microbial pathogens in poultry. Residues of these antibiotics in poultry meat have been determined in many of the studies globally and are considered one of the possible causes of antibacterial resistance in human pathogens...
April 2018: Journal of Food Protection
https://www.readbyqxmd.com/read/29526649/2015-evidence-analysis-library-systematic-review-on-advanced-technology-in-food-production
#15
Marianne Smith Edge, Mary Elizabeth Kunkel, Jennifer Schmidt, Constantina Papoutsakis
In the late 20th century, plant breeders began using molecular biology techniques such as recombinant DNA, also known as genetic engineering, along with traditional cross-breeding. Ten plant and one animal food have been approved for commercialization in the United States. Today, foods and ingredients from genetically engineered (GE) crops are present throughout the food supply, which has led to varying levels of acceptance. Much discussion exists among consumers and health professionals about the believability of statements made regarding benefits or risks of GE foods...
March 8, 2018: Journal of the Academy of Nutrition and Dietetics
https://www.readbyqxmd.com/read/29504101/studying-the-phenotypic-and-genotypic-expression-of-antibiotic-resistance-in-campylobacter-jejuni-under-stress-conditions
#16
N R Efimochkina, V V Stetsenko, I V Bykova, Yu M Markova, A S Polyanina, A I Aleshkina, S A Sheveleva
Specific features for the development of resistance in Campylobacter jejuni strains were studied after treatment with antibiotics of 6 pharmacological groups. Populations of 18 native strains of C. jejuni (isolated from raw poultry products) and their subcultures (obtained after 2-3-fold stress exposures to antimicrobial agents in subinhibitory doses) were examined to evaluate the expression of phenotypic antibiotic resistance. Genotypic properties of strains were studied by the PCR with primers that detect the presence of genes for resistance to aminoglycosides (aphA-1, aphA-3, and aphA-7), tetracyclines (tetO), and quinolones (GZgyrA)...
March 2018: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/29501183/a-multifunctional-molecularly-imprinted-polymer-based-biosensor-for-direct-detection-of-doxycycline-in-food-samples
#17
Jon Ashley, XiaoTong Feng, Yi Sun
In this study, we developed a new type of multifunctional molecularly imprinted polymer (MIP) composite as an all-in-one biosensor for the low-cost, rapid and sensitive detection of doxycycline in pig plasma. The MIP composite consisted of a magnetic core for ease of manipulation, and a shell of fluorescent MIPs for selective recognition of doxycycline. By simply incorporating a small amount of fluorescent monomer (fluorescein-O-acrylate), the fluorescent MIP layer was successfully grafted onto the magnetic core via a surface imprinting technique...
May 15, 2018: Talanta
https://www.readbyqxmd.com/read/29501128/an-overview-of-the-main-foodstuff-sample-preparation-technologies-for-tetracycline-residue-determination
#18
REVIEW
Michael Pérez-Rodríguez, Roberto Gerardo Pellerano, Leonardo Pezza, Helena Redigolo Pezza
Tetracyclines are widely used for both the treatment and prevention of diseases in animals as well as for the promotion of rapid animal growth and weight gain. This practice may result in trace amounts of these drugs in products of animal origin, such as milk and eggs, posing serious risks to human health. The presence of tetracycline residues in foods can lead to the transmission of antibiotic-resistant pathogenic bacteria through the food chain. In order to ensure food safety and avoid exposure to these substances, national and international regulatory agencies have established tolerance levels for authorized veterinary drugs, including tetracycline antimicrobials...
May 15, 2018: Talanta
https://www.readbyqxmd.com/read/29484666/chlortetracycline-and-related-tetracyclines-detection-in-wheat-and-rye-grain
#19
Christine Schwake-Anduschus, Georg Langenkämper
BACKGROUND: Antibiotic drugs are excreted to a large proportion by livestock. Thus, antibiotics are distributed on fields with slurry and can be taken up by plants. In the present study, hydroponic experiments were performed to reveal whether the widely administered chlortetracycline is taken up into wheat grain in a concentration-dependent manner. A further goal was to determine (chlor)tetracyclines in wheat and rye grain from agricultural practice. RESULTS: Increasing chlortetracycline deposition in wheat grain was observed with a rising chlortetracycline spiking level in the hydroponic solution...
February 27, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29451115/understanding-the-complexities-of-food-safety-using-a-one-health-approach
#20
Kalmia E Kniel, Deepak Kumar, Siddhartha Thakur
The philosophy of One Health is growing in concept and clarity. The interdependence of human, animal, and environmental health is the basis for the concept of One Health. One Health is a comprehensive approach to ensure the health of people, animals, and the environment through collaborative efforts. Preharvest food safety issues align with the grand concept of One Health. Imagine any food production system, and immediately, parallel images from One Health emerge: for example, transmission of zoonotic diseases, antibiotic residues, or resistance genes in the environment; environmental and animal host reservoirs of disease; challenges with rearing animals and growing fresh produce on the same farm; application and transport of manure or diseased animals...
February 2018: Microbiology Spectrum
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