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https://www.readbyqxmd.com/read/28177786/response-of-microbial-communities-to-roxarsone-under-different-culture-conditions
#1
Yaci Liu, Zhaoji Zhang, Yasong Li, Yuhong Fei
Roxarsone is a feed additive widely used in broiler and swine industry that has the potential to contaminate environment, mainly via the use of poultry manure as fertilizer, which results in release of inorganic arsenic to the soil and water. This study was conducted to investigate the roxarsone degradation and the response of microbial community under different culture conditions using high-throughput sequencing technology. Poultry litter was incubated for 288 h in the presence of roxarsone under light aerobic, dark aerobic, or dark anaerobic conditions, showing that roxarsone was completely degraded after 48 h of dark anaerobic incubation, while 79...
January 20, 2017: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/28171769/effects-of-different-swine-manure-to-wheat-straw-ratios-on-antibiotic-resistance-genes-and-the-microbial-community-structure-during-anaerobic-digestion
#2
Wen Song, Xiaojuan Wang, Jie Gu, Sheqi Zhang, Yanan Yin, Yang Li, Xun Qian, Wei Sun
This study explored the effects of different mass ratios of swine manure relative to wheat straw (3:7, 5:5, and 7:3, i.e., control reactors C1, C2, and C3, respectively) on variations in antibiotic resistance genes (ARGs) and the microbial community during anaerobic digestion (AD). The cumulative biogas production volumes were 1711, 3857, and 3226mL in C1, C2, and C3, respectively. After AD, the total relative abundance of ARGs decreased by 4.23 logs in C3, whereas the reductions were only 1.03 and 1.37 logs in C1 and C2, respectively...
January 30, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28157602/recovery-of-ammonia-and-phosphate-minerals-from-swine-wastewater-using-gas-permeable-membranes
#3
M B Vanotti, P J Dube, A A Szogi, M C García-González
Gas-permeable membrane technology is useful to recover ammonia (NH3) from liquid manures. In this study, phosphorus (P) recovery via MgCl2 precipitation was enhanced by combining it with NH3 recovery through gas-permeable membranes. Anaerobically digested swine wastewater containing approximately 2300 mg NH4(+)-N L(-1) and 450 mg P L(-1) was treated using submerged membranes plus low-rate aeration to recover the NH3 from within the liquid and MgCl2 to precipitate the P. The experiments included a first configuration where N and P were recovered sequentially and a second configuration with simultaneous recovery...
January 30, 2017: Water Research
https://www.readbyqxmd.com/read/28122910/environmental-emission-of-multiresistant-escherichia-coli-carrying-the-colistin-resistance-gene-mcr-1-from-german-swine-farms
#4
Sebastian Guenther, Linda Falgenhauer, Torsten Semmler, Can Imirzalioglu, Trinad Chakraborty, Uwe Roesler, Nicole Roschanski
OBJECTIVES: Pigs have been the focus of the worldwide spread of colistin resistance. However, there is little information on the transmission of mcr-1-containing bacteria into the environment of pig farms. We therefore rescreened environmental Escherichia coli isolates from the surrounding farm areas of three previously mcr-1-positive swine herds in Germany. METHODS: Thirty-five mixed bacterial cultures obtained from boot swabs, flies, dog faeces and manure from three pig farms in Germany in 2011-12 were non-selectively recultivated and the presence of the mcr-1 gene was checked by real-time PCR...
January 25, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28122880/lethal-effects-of-the-insect-growth-regulator-cyromazine-against-three-species-of-filth-flies-musca-domestica-stomoxys-calcitrans-and-fannia-canicularis-diptera-muscidae-in-cattle-swine-and-chicken-manure
#5
William A Donahue, Allan T Showler, Michael W Donahue, Bret E Vinson, Weste L A Osbrink
The presence of various species of filth flies is a widespread problem where livestock, including poultry, are maintained and where manure accumulates. The house fly, Musca domestica L.; the stable fly, Stomoxys calcitrans (L.); and the little house fly, Fannia canicularis (L.) (each Diptera: Muscidae), the target pests in our study, can mechanically spread diseases, and S. calcitrans can bite cattle, causing losses in meat and milk production. Chemical control is widely used to suppress filth flies, but resistance to conventional insecticides has become problematic...
January 25, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28115502/a-sampling-and-metagenomic-sequencing-based-methodology-for-monitoring-antimicrobial-resistance-in-swine-herds
#6
Patrick Munk, Vibe Dalhoff Andersen, Leonardo de Knegt, Marie Stengaard Jensen, Berith Elkær Knudsen, Oksana Lukjancenko, Hanne Mordhorst, Julie Clasen, Yvonne Agersø, Anders Folkesson, Sünje Johanna Pamp, Håkan Vigre, Frank Møller Aarestrup
OBJECTIVES: Reliable methods for monitoring antimicrobial resistance (AMR) in livestock and other reservoirs are essential to understand the trends, transmission and importance of agricultural resistance. Quantification of AMR is mostly done using culture-based techniques, but metagenomic read mapping shows promise for quantitative resistance monitoring. METHODS: We evaluated the ability of: (i) MIC determination for Escherichia coli; (ii) cfu counting of E. coli; (iii) cfu counting of aerobic bacteria; and (iv) metagenomic shotgun sequencing to predict expected tetracycline resistance based on known antimicrobial consumption in 10 Danish integrated slaughter pig herds...
February 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28101710/effect-of-different-sulfadimidine-addition-methods-on-its-degradation-behaviour-in-swine-manure
#7
Tian-Tian Ren, Xiao-Yang Li, Yan Wang, Yong-De Zou, Xin-Di Liao, Juan-Boo Liang, Yin-Bao Wu
Sulfadimidine (SM2) is commonly used in the swine industry and enters the environment via faeces. In recent years, advances in the ecotoxicology of SM2 have become a popular research interest with two common research methods including swine manure collection from swine fed with a diet containing SM2 and directly adding SM2. The purpose of this experiment was to compare SM2 degradation behaviour in pig manure with two different SM2 addition methods. The results showed that the degradation half-lives of SM2 in manure from SM2-fed swine treatment were 33...
January 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28056374/kinetic-parameter-estimation-model-for-anaerobic-co-digestion-of-waste-activated-sludge-and-microalgae
#8
Eunyoung Lee, Jewel Cumberbatch, Meng Wang, Qiong Zhang
Anaerobic co-digestion has a potential to improve biogas production, but limited kinetic information is available for co-digestion. This study introduced regression-based models to estimate the kinetic parameters for the co-digestion of microalgae and Waste Activated Sludge (WAS). The models were developed using the ratios of co-substrates and the kinetic parameters for the single substrate as indicators. The models were applied to the modified first-order kinetics and Monod model to determine the rate of hydrolysis and methanogenesis for the co-digestion...
March 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28017419/integrating-remote-sensing-with-nutrient-management-plans-to-calculate-nitrogen-parameters-for-swine-cafos-at-the-sprayfield-and-sub-watershed-scales
#9
Elizabeth C Christenson, Marc L Serre
North Carolina (NC) regulates swine concentrated animal feeding operations (CAFOs) using five-year nutrient management plans (NMPs) requiring the plant available nitrogen sprayed (PANspray) to be less than that utilized by crops (PANcrops), i.e. the PAN balance (defined as PANbal=PANspray-PANcrops) remains negative, which avoids over-spraying liquid effluent onto crops. Objectives of this research are first to characterize Duplin County sprayfields and PANbal by creating the first, open-source sprayfield spatial database created for swine CAFOs in NC (for Duplin County)...
December 22, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27966070/african-swine-fever-outbreak-on-a-medium-sized-farm-in-uganda-biosecurity-breaches-and-within-farm-virus-contamination
#10
Erika Chenais, Susanna Sternberg-Lewerin, Sofia Boqvist, Lihong Liu, Neil LeBlanc, Tonny Aliro, Charles Masembe, Karl Ståhl
In Uganda, a low-income country in east Africa, African swine fever (ASF) is endemic with yearly outbreaks. In the prevailing smallholder subsistence farming systems, farm biosecurity is largely non-existent. Outbreaks of ASF, particularly in smallholder farms, often go unreported, creating significant epidemiological knowledge gaps. The continuous circulation of ASF in smallholder settings also creates biosecurity challenges for larger farms. In this study, an on-going outbreak of ASF in an endemic area was investigated on farm level, including analyses of on-farm environmental virus contamination...
February 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/27912183/relationships-between-sulfachloropyridazine-sodium-zinc-and-sulfonamide-resistance-genes-during-the-anaerobic-digestion-of-swine-manure
#11
Ranran Zhang, Jie Gu, Xiaojuan Wang, Xun Qian, Manli Duan, Wei Sun, Yajun Zhang, Haichao Li, Yang Li
In this study, swine manure containing sulfachloropyridazine sodium (SCPS) and zinc was subjected to mesophilic (37°C) anaerobic digestion (AD). The absolute abundances (AAs) of antibiotic resistance genes (ARGs) were evaluated, as well as intI1 and intI2, and the degradation of SCPS according to variation in the amount of bio-available zinc (bio-Zn). In digester that only contained SCPS, the concentrations of SCPS were lower than that digesters both contain SCPS and Zn. Compared with the control digester, the addition of SCPS increased the AAs of sul1, sul3, drfA1, and drfA7 by 1...
February 2017: Bioresource Technology
https://www.readbyqxmd.com/read/27898775/sodium-tetraborate-decahydrate-treatment-reduces-hydrogen-sulfide-and-the-sulfate-reducing-bacteria-population-of-swine-manure
#12
Melvin T Yokoyama, Cheryl Spence, Susan M Hengemuehle, Terence R Whitehead, Robert von Bernuth, Michael Cotta
Emission of odorous and toxic gases from stored livestock manure is well documented and poses a serious health risk to farmers and livestock. Hydrogen sulfide emissions have been sharply rising with increasingly intensive livestock production and are of particular concern because of the acute toxicity of this gas. Numerous strategies, technologies, and chemical treatments have been used to control hydrogen sulfide emissions, but none have worked particularly well because they are neither cost-effective nor environmentally sustainable, or they are too toxic for animals...
November 2016: Journal of Environmental Quality
https://www.readbyqxmd.com/read/27891118/colistin-in-pig-production-chemistry-mechanism-of-antibacterial-action-microbial-resistance-emergence-and-one-health-perspectives
#13
REVIEW
Mohamed Rhouma, Francis Beaudry, William Thériault, Ann Letellier
Colistin (Polymyxin E) is one of the few cationic antimicrobial peptides commercialized in both human and veterinary medicine. For several years now, colistin has been considered the last line of defense against infections caused by multidrug-resistant Gram-negative such as Acinetobacter baumannii, Pseudomonas aeruginosa, and Klebsiella pneumoniae. Colistin has been extensively used orally since the 1960s in food animals and particularly in swine for the control of Enterobacteriaceae infections. However, with the recent discovery of plasmid-mediated colistin resistance encoded by the mcr-1 gene and the higher prevalence of samples harboring this gene in animal isolates compared to other origins, livestock has been singled out as the principal reservoir for colistin resistance amplification and spread...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27890692/rapid-identification-of-robinsoniella-peoriensis-using-specific-16s-rrna-gene-pcr-primers
#14
Terence R Whitehead, Christelle Anoma, Richard W McLaughlin
Robinsoniella peoriensis is a Gram-positive, spore-forming anaerobic bacterium initially isolated and characterized from swine manure and feces. Since then strains of this species have been identified from a variety of mammalian and other GI tracts. More recently strains of this species have been isolated from a plethora of human infections. Therefore, it is of great interest to develop methods to rapidly identify this microorganism in the medical and other laboratories. This report describes the use of PCR primers targeting the 16S rRNA gene of R...
November 24, 2016: Anaerobe
https://www.readbyqxmd.com/read/27843934/prioritization-of-managed-pork-supply-movements-during-a-fmd-outbreak-in-the-us
#15
Gilbert R Patterson, Alicia H Mohr, Tim P Snider, Thomas A Lindsay, Peter R Davies, Tim J Goldsmith, Fernando Sampedro
In the event of a foot-and-mouth disease (FMD) outbreak in the United States, local, state, and federal authorities will implement a foreign animal disease emergency response plan restricting the pork supply chain movements and likely disrupting the continuity of the swine industry business. To minimize disruptions of the food supply while providing an effective response in an outbreak, it is necessary to have proactive measures in place to ensure minimal disease spread and maximum continuation of business...
2016: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/27829035/epidemiology-of-antimicrobial-resistance-in-escherichia-coli-isolates-from-raccoons-procyon-lotor-and-the-environment-on-swine-farms-and-conservation-areas-in-southern-ontario
#16
Kristin J Bondo, David L Pearl, Nicol Janecko, Patrick Boerlin, Richard J Reid-Smith, Jane Parmley, Claire M Jardine
Antimicrobial resistance is a global threat to livestock, human and environmental health. Although resistant bacteria have been detected in wildlife, their role in the epidemiology of antimicrobial resistance is not clear. Our objective was to investigate demographic, temporal and climatic factors associated with carriage of antimicrobial resistant Escherichia coli in raccoons and the environment. We collected samples from raccoon paws and feces and from soil, manure pit and dumpsters on five swine farms and five conservation areas in Ontario, Canada once every five weeks from May to November, 2011-2013 and tested them for E...
2016: PloS One
https://www.readbyqxmd.com/read/27814534/changes-in-antibiotic-concentrations-and-antibiotic-resistome-during-commercial-composting-of-animal-manures
#17
Wan-Ying Xie, Xin-Ping Yang, Qian Li, Long-Hua Wu, Qi-Rong Shen, Fang-Jie Zhao
The over-use of antibiotics in animal husbandry in China and the concomitant enhanced selection of antibiotic resistance genes (ARGs) in animal manures are of serious concern. Thermophilic composting is an effective way of reducing hazards in organic wastes. However, its effectiveness in antibiotic degradation and ARG reduction in commercial operations remains unclear. In the present study, we determined the concentrations of 15 common veterinary antibiotics and the abundances of 213 ARGs and 10 marker genes for mobile genetic elements (MGEs) in commercial composts made from cattle, poultry and swine manures in Eastern China...
December 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27796572/distribution-of-sulfonamides-in-liquid-and-solid-anaerobic-digestates-effects-of-hydraulic-retention-time-and-swine-manure-to-rice-straw-ratio
#18
Hongmei Jin, Caiyun Xu, Jing Du, Huashan Wu, Hongying Huang, Zhizhou Chang, Yueding Xu, Lixiang Zhou
The effects of hydraulic retention time (20 and 15 days) and swine manure to rice straw ratios on distribution of sulfonamides (SAs) in liquid and solid anaerobic digestates were studied using bench-scale completely stirred tank reactors at (37 ± 1) °C. Results showed that anaerobic digestion (AD) treatment exhibited a good removal effect on sulfadiazine (SDZ), sulfadimidine (SM2) and sulfachloropyridazine (SCP), especially at HRT = 20 days and co-digestion with swine manure and rice straw. The removal rates of SDZ and SM2 were more than 90%, but only 72...
February 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/27755598/assessing-the-impact-of-manure-application-in-commercial-swine-farms-on-the-transmission-of-antimicrobial-resistant-salmonella-in-the-environment
#19
Suchawan Pornsukarom, Siddhartha Thakur
Land application of swine manure in commercial hog farms is an integral part of their waste management system which recycles the nutrients back to the soil. However, manure application can lead to the dissemination of bacterial pathogens in the environment and pose a serious public health threat. The aim of this study was to determine the dissemination of antimicrobial resistant Salmonella in the environment due to manure application in commercial swine farms in North Carolina (n = 6) and Iowa (n = 7), two leading pork producing states in the US...
2016: PloS One
https://www.readbyqxmd.com/read/27752947/use-of-commercial-organic-fertilizer-increases-the-abundance-of-antibiotic-resistance-genes-and-antibiotics-in-soil
#20
Xue Zhou, Min Qiao, Feng-Hua Wang, Yong-Guan Zhu
The application of manure-based commercial organic fertilizers (COFs) is becoming increasingly extensive because of the expanding market for organic food. The present study examined the effects of repeated applications of chicken or swine manure-based COFs on the fate of antibiotics and antibiotic resistance genes (ARGs) in soil by conducting a soil microcosm experiment. Application of COFs significantly increased antibiotics residues, as well as the relative abundance of ARGs and the integrase gene of class 1 integrons (intΙ1) in soil...
January 2017: Environmental Science and Pollution Research International
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