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Ishengoma VL, Amachawadi RG, Tokach MD, Shi X, Kang Q, Goodband RD, DeRouchey J, Woodworth J, Nagaraja TG. Impact of In-Feed versus In-Water Chlortetracycline and Tiamulin Administrations on Fecal Prevalence and Antimicrobial Susceptibilities of Campylobacter in a Population of Nursery Pigs. Microorganisms 2023; 11:2876. [PMID: 38138021 PMCID: PMC10745678 DOI: 10.3390/microorganisms11122876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/19/2023] [Accepted: 11/25/2023] [Indexed: 12/24/2023] Open
Abstract
Antimicrobial resistance (AMR) in bacteria is a major public health concern in the US and around the world. Campylobacter is an important foodborne pathogen that resides in the gut of pigs and is shed in feces, with the potential to be transmitted to humans. In pigs, the oral route, either in-feed or in-water, is by far the most common route of administration of antimicrobials. Because the distribution of the antibiotic in the gut and the dosages are different, the impact of in-feed vs. in-water administration of antibiotics on the development of AMR is likely to be different. Therefore, a study was conducted to compare in-feed vs. in-water administrations of chlortetracycline (CTC) and/or tiamulin on fecal prevalence and AMR profiles of Campylobacter among weaned nursery piglets. A total of 1,296 weaned piglets, allocated into 48 pens (27 piglets per pen), were assigned randomly to six treatment groups: Control (no antibiotic), in-feed CTC, in-water CTC, in-feed tiamulin, in-water tiamulin, or in-feed CTC and tiamulin. Fecal samples were collected randomly from 5 piglets from each pen during the pre-treatment (days 0, 7), treatment (days 14, 21), and post-treatment (days 28, 35) phases. Bacterial isolations and species identifications were conducted by culture and PCR, respectively. The microbroth dilution method with SensititreTM plates was used to determine the antimicrobial susceptibility and resistance of Campylobacter isolates. The results on resistance were interpreted based on the European Committee on Antimicrobial Susceptibility Testing (EUCAST) epidemiological cutoff values for Campylobacter. The overall prevalence of Campylobacter was 18.2% (262/1440). Speciation of Campylobacter isolates by PCR indicated the prevalence of only two species: Campylobacter hyointestinalis (17.9%; 258/1440) and C. coli (0.3%; 4/1440). Campylobacter isolates were resistant to tetracycline (98.5%), ciprofloxacin (89.3%), and nalidixic acid (60.3%). Neither the antibiotic nor the route of administration had an effect (p > 0.05) on the prevalence of AMR Campylobacter in the feces of piglets.
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Affiliation(s)
- Victor L. Ishengoma
- Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, USA;
| | - Raghavendra G. Amachawadi
- Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, USA;
| | - Mike D. Tokach
- Department of Animal Sciences & Industry, College of Agriculture, Kansas State University, Manhattan, KS 66506, USA; (M.D.T.); (R.D.G.); (J.D.); (J.W.)
| | - Xiaorong Shi
- Department of Diagnostic Medicine and Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, USA; (X.S.); (T.G.N.)
| | - Qing Kang
- Department of Statistics, College of Arts and Sciences, Kansas State University, Manhattan, KS 66506, USA;
| | - Robert D. Goodband
- Department of Animal Sciences & Industry, College of Agriculture, Kansas State University, Manhattan, KS 66506, USA; (M.D.T.); (R.D.G.); (J.D.); (J.W.)
| | - Joel DeRouchey
- Department of Animal Sciences & Industry, College of Agriculture, Kansas State University, Manhattan, KS 66506, USA; (M.D.T.); (R.D.G.); (J.D.); (J.W.)
| | - Jason Woodworth
- Department of Animal Sciences & Industry, College of Agriculture, Kansas State University, Manhattan, KS 66506, USA; (M.D.T.); (R.D.G.); (J.D.); (J.W.)
| | - Tiruvoor G. Nagaraja
- Department of Diagnostic Medicine and Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, USA; (X.S.); (T.G.N.)
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Feed Safety and the Development of Poultry Intestinal Microbiota. Animals (Basel) 2022; 12:ani12202890. [PMID: 36290275 PMCID: PMC9598862 DOI: 10.3390/ani12202890] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/10/2022] [Accepted: 10/18/2022] [Indexed: 11/18/2022] Open
Abstract
Simple Summary Intensive gut colonisation of animals starts immediately after birth or hatch. Oral route of colonisation, and consequently the first feed, plays a significant role in the continual defining of the intestinal microbial community. The feed can influence colonisation in two ways: providing the microbial inoculum and providing the nutritional requirements that suit a specific type of microbes. In combination with environmental factors, feed shapes animal’s future health and performance from the first day of life. The objective of this review was to investigate feed safety aspects of animal nutrition from the gut colonisation aspect. Abstract The first feed offered to young chicks is likely the most important meal in their life. The complex gut colonisation process is determined with early exposure and during the first days of life before the microbial community is formed. Therefore, providing access to high-quality feed and an environment enriched in the beneficial and deprived of pathogenic microorganisms during this period is critical. Feed often carries a complex microbial community that can contain major poultry pathogens and a range of chemical contaminants such as heavy metals, mycotoxins, pesticides and herbicides, which, although present in minute amounts, can have a profound effect on the development of the microbial community and have a permanent effect on bird’s overall health and performance. The magnitude of their interference with gut colonisation in livestock is yet to be determined. Here, we present the animal feed quality issues that can significantly influence the microbial community development, thus severely affecting the bird’s health and performance.
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Santos-Santórum Suárez C, Sanders P, Perrin-Guyomard A, Hurtaud-Pessel D, Laurentie M, Viel A, Taillandier JF, Lagree MP, Gaugain M. Validation of a LC-MS/MS method for the quantitative analysis of four antibiotics in pig tissues and plasma to assess the risk of transfer of residues to edible matrices after exposure to cross-contaminated feed. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2022; 39:1818-1827. [PMID: 36194447 DOI: 10.1080/19440049.2022.2126529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2022]
Abstract
Cross-contamination between medicated and non-medicated feed can occur during production, processing, transport or storage of animal feed. This may lead to the presence of low concentrations of antibiotics in supposedly drug-free feed for food production animals, which potentially could also harm consumers due to residues. In addition, consumption of sub-therapeutic concentrations of antibiotics may increase the risk of emergence of resistant bacteria. In this study, LC-MS/MS methods were developed to quantify four antibiotics (sulfadimethoxine, oxytetracycline, trimethoprim and amoxicillin) in several pig matrices, i.e. plasma, muscle, liver, kidneys and faeces. All methods were validated using the accuracy profile, except for amoxicillin in faeces, for which extraction could not be optimised for low concentrations. These methods were then applied as part of an animal study during which several pigs received contaminated feed at a concentration corresponding to 2% of therapeutic dose, in order to evaluate the risk of the presence of residues in animal faeces and tissues. The results showed that sulfadimethoxine is well absorbed and accumulates in the muscle, kidneys and liver, where concentrations were higher than the maximum residue limits (MRLs) authorised in EU legislation. Conversely, oxytetracycline was mostly found in faeces as its oral absorption is very low. Trimethoprim concentrations were slightly higher than the tolerated MRL in the kidneys, but they were below this level in the other tissues. Finally, amoxicillin concentrations remained below the lower limit of quantification of the methods in all matrices.
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Affiliation(s)
- Cristina Santos-Santórum Suárez
- ANSES-Fougères Laboratory (French National Agency for Food, Environment and Occupational Health & Safety), Fougères Cedex, France
| | - Pascal Sanders
- ANSES-Fougères Laboratory (French National Agency for Food, Environment and Occupational Health & Safety), Fougères Cedex, France
| | - Agnès Perrin-Guyomard
- ANSES-Fougères Laboratory (French National Agency for Food, Environment and Occupational Health & Safety), Fougères Cedex, France
| | - Dominique Hurtaud-Pessel
- ANSES-Fougères Laboratory (French National Agency for Food, Environment and Occupational Health & Safety), Fougères Cedex, France
| | - Michel Laurentie
- ANSES-Fougères Laboratory (French National Agency for Food, Environment and Occupational Health & Safety), Fougères Cedex, France
| | - Alexis Viel
- ANSES-Fougères Laboratory (French National Agency for Food, Environment and Occupational Health & Safety), Fougères Cedex, France
| | - Jean-François Taillandier
- ANSES-Fougères Laboratory (French National Agency for Food, Environment and Occupational Health & Safety), Fougères Cedex, France
| | - Marie-Pierre Lagree
- ANSES-Fougères Laboratory (French National Agency for Food, Environment and Occupational Health & Safety), Fougères Cedex, France
| | - Murielle Gaugain
- ANSES-Fougères Laboratory (French National Agency for Food, Environment and Occupational Health & Safety), Fougères Cedex, France
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Moyo B, Tavengwa NT. Critical review of solid phase extraction for multiresidue clean-up and pre-concentration of antibiotics from livestock and poultry manure. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2021; 39:229-241. [PMID: 34732110 DOI: 10.1080/19440049.2021.1989497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The release of antibiotics into the environment from agricultural industries has received tremendous attention in recent years. Nonpoint source contamination of the terrestrial environment by these compounds can result from fertilisation of agricultural soils with manure. The presence of antibiotics and their metabolites in manure may pose a threat to agro-ecosystems. This may result in the emergence of antibiotic resistance bacteria in humans through the food chain and this is a major concern globally at the moment. Therefore, monitoring of manure for antibiotic residues is of vital importance in order to assess the risks of environmental pollution to human health by these drugs. Several sample pre-treatment techniques have been developed for the extraction of antibiotic residues from complex matrices including manure over the years. Despite new developments in recent years in separation science where the common trend is miniaturisation and green approaches, solid-phase extraction is still the most widely used technique in the extraction of antibiotics from agricultural wastes such as manure. In view of this, the aim of this review was to give a critical overview of studies that have been conducted in the past 6 years on the extraction of antibiotic residues from manure employing solid-phase extraction based on Oasis HLB and Strata-X. Adsorption mechanisms of these sorbents were also briefly discussed.
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Affiliation(s)
- Babra Moyo
- Department of Chemistry, School of Mathematical and Natural Sciences, University of Venda, Thohoyandou, South Africa.,Department of Food Science and Technology, School of Agriculture, University of Venda, Thohoyandou, South Africa
| | - Nikita T Tavengwa
- Department of Chemistry, School of Mathematical and Natural Sciences, University of Venda, Thohoyandou, South Africa
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Xu N, Cheng B, Li M, Lin Z, Ai X. Withdrawal Interval Estimation of Doxycycline in Yellow Catfish ( Pelteobagrus fulvidraco) Using an LC-MS/MS Method Based upon QuEChERS Sampling Preparation. Foods 2021; 10:foods10112554. [PMID: 34828835 PMCID: PMC8625883 DOI: 10.3390/foods10112554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/20/2021] [Accepted: 10/20/2021] [Indexed: 11/16/2022] Open
Abstract
Limited information on residue depletion of doxycycline (DC) is available in yellow catfish (Pelteobagrus fulvidraco) using the determination of LC-MS/MS based upon a rapid and simple method of sample preparation. This study collected plasma and tissue samples of yellow catfish at pre-determined time points following 3-day consecutive oral administration of DC at 20 mg/kg. The samples were prepared using a QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) approach. The limit of detection and the limit of quantitation were 2.5 and 5 µg/kg or µg/L, respectively, for DC in plasma and tissues (e.g., muscle + skin, liver, kidney, and gill). The recoveries of DC ranged from 67.2% to 86.2%. The decision limit (CCα) and the detection capability (CCβ) were from 106.2 to 127.8 μg/kg or μg/L. The withdrawal times of DC in muscle + skin were estimated to be 22 d based on the guidelines in China and Europe and 27 d based on Japan's standard. Overall, this study not only provides an efficient method to rapidly determine the DC concentrations in fish-derived tissues but also provides important information on the safety assessment of DC in aquatic animal-derived food products.
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Affiliation(s)
- Ning Xu
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China;
- Hu Bei Province Engineering and Technology Research Center of Aquatic Product Quality and Safety, Wuhan 430223, China
| | - Bo Cheng
- Aquatic Products Quality and Standard Research Center, Chinese Academy of Fishery Sciences, Beijing 100141, China
- Correspondence: (B.C.); (X.A.); Tel.: +86-010-68671246 (B.C.); +86-027-81780151 (X.A.)
| | - Miao Li
- Institute of Computational Comparative Medicine (ICCM), Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, USA; (M.L.); (Z.L.)
| | - Zhoumeng Lin
- Institute of Computational Comparative Medicine (ICCM), Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, USA; (M.L.); (Z.L.)
| | - Xiaohui Ai
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China;
- Hu Bei Province Engineering and Technology Research Center of Aquatic Product Quality and Safety, Wuhan 430223, China
- Correspondence: (B.C.); (X.A.); Tel.: +86-010-68671246 (B.C.); +86-027-81780151 (X.A.)
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Koutsoumanis K, Allende A, Alvarez‐Ordóñez A, Bolton D, Bover‐Cid S, Chemaly M, Davies R, De Cesare A, Herman L, Hilbert F, Lindqvist R, Nauta M, Ru G, Simmons M, Skandamis P, Suffredini E, Andersson DI, Bampidis V, Bengtsson‐Palme J, Bouchard D, Ferran A, Kouba M, López Puente S, López‐Alonso M, Nielsen SS, Pechová A, Petkova M, Girault S, Broglia A, Guerra B, Innocenti ML, Liébana E, López‐Gálvez G, Manini P, Stella P, Peixe L. Maximum levels of cross-contamination for 24 antimicrobial active substances in non-target feed. Part 12: Tetracyclines: tetracycline, chlortetracycline, oxytetracycline, and doxycycline. EFSA J 2021; 19:e06864. [PMID: 34729092 PMCID: PMC8546800 DOI: 10.2903/j.efsa.2021.6864] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The specific concentrations of tetracycline, chlortetracycline, oxytetracycline and doxycycline in non-target feed for food-producing animals, below which there would not be an effect on the emergence of, and/or selection for, resistance in bacteria relevant for human and animal health, as well as the specific antimicrobial concentrations in feed which have an effect in terms of growth promotion/increased yield were assessed by EFSA in collaboration with EMA. Details of the methodology used for this assessment, associated data gaps and uncertainties are presented in a separate document. To address antimicrobial resistance, the Feed Antimicrobial Resistance Selection Concentration (FARSC) model developed specifically for the assessment was applied. The FARSC for these four tetracyclines was estimated. To address growth promotion, data from scientific publications obtained from an extensive literature review were used. Levels in feed that showed to have an effect on growth promotion/increased yield were reported for tetracycline, chlortetracycline, oxytetracycline, whilst for doxycycline no suitable data for the assessment were available. Uncertainties and data gaps associated with the levels reported were addressed. It was recommended to perform further studies to supply more diverse and complete data related to the requirements for calculation of the FARSC for these antimicrobials.
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7
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Koutsoumanis K, Allende A, Alvarez‐Ordóñez A, Bolton D, Bover‐Cid S, Chemaly M, Davies R, De Cesare A, Herman L, Hilbert F, Lindqvist R, Nauta M, Ru G, Simmons M, Skandamis P, Suffredini E, Andersson DI, Bampidis V, Bengtsson‐Palme J, Bouchard D, Ferran A, Kouba M, López Puente S, López‐Alonso M, Nielsen SS, Pechová A, Petkova M, Girault S, Broglia A, Guerra B, Innocenti ML, Liébana E, López‐Gálvez G, Manini P, Stella P, Peixe L. Maximum levels of cross-contamination for 24 antimicrobial active substances in non-target feed. Part 13: Diaminopyrimidines: trimethoprim. EFSA J 2021; 19:e06865. [PMID: 34729093 PMCID: PMC8546793 DOI: 10.2903/j.efsa.2021.6865] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
The specific concentrations of trimethoprim in non-target feed for food-producing animals below which there would not be an effect on the emergence of, and/or selection for, resistance in bacteria relevant for human and animal health, as well as the specific antimicrobial concentrations in feed which have an effect in terms of growth promotion/increased yield were assessed by EFSA in collaboration with EMA. Details of the methodology used for this assessment, associated data gaps and uncertainties, are presented in a separate document. To address antimicrobial resistance, the Feed Antimicrobial Resistance Selection Concentration (FARSC) model developed specifically for the assessment was applied. The FARSC for trimethoprim was estimated. Uncertainties and data gaps associated to the levels reported were addressed. To address growth promotion, data from scientific publications obtained from an extensive literature review were used. No suitable data for the assessment were available. It was recommended to perform further studies to supply more diverse and complete data related to the requirements for calculation of the FARSC for trimethoprim.
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8
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Koutsoumanis K, Allende A, Alvarez‐Ordóñez A, Bolton D, Bover‐Cid S, Chemaly M, Davies R, De Cesare A, Herman L, Hilbert F, Lindqvist R, Nauta M, Ru G, Simmons M, Skandamis P, Suffredini E, Andersson DI, Bampidis V, Bengtsson‐Palme J, Bouchard D, Ferran A, Kouba M, López Puente S, López‐Alonso M, Nielsen SS, Pechová A, Petkova M, Girault S, Broglia A, Guerra B, Innocenti ML, Liébana E, López‐Gálvez G, Manini P, Stella P, Peixe L. Maximum levels of cross-contamination for 24 antimicrobial active substances in non-target feed. Part 1: Methodology, general data gaps and uncertainties. EFSA J 2021; 19:e06852. [PMID: 34729081 PMCID: PMC8547316 DOI: 10.2903/j.efsa.2021.6852] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
The European Commission requested EFSA to assess, in collaboration with EMA, the specific concentrations of antimicrobials resulting from cross-contamination in non-target feed for food-producing animals below which there would not be an effect on the emergence of, and/or selection for, resistance in microbial agents relevant for human and animal health, as well as the levels of the antimicrobials which could have a growth promotion/increase yield effect. The assessment was performed for 24 antimicrobial active substances, as specified in the mandate. This scientific opinion describes the methodology used, and the main associated data gaps and uncertainties. To estimate the antimicrobial levels in the non-target feed that would not result in emergence of, and/or selection for, resistance, a model was developed. This 'Feed Antimicrobial Resistance Selection Concentration' (FARSC) model is based on the minimal selective concentration (MSC), or the predicted MSC (PMSC) if MSC for the most susceptible bacterial species is unavailable, the fraction of antimicrobial dose available for exposure to microorganisms in the large intestine or rumen (considering pharmacokinetic parameters), the daily faecal output or rumen volume and the daily feed intake. Currently, lack of data prevents the establishment of PMSC and/or FARSC for several antimicrobials and animal species. To address growth promotion, data from an extensive literature search were used. Specific assessments of the different substances grouped by antimicrobial classes are addressed in separate scientific opinions. General conclusions and recommendations were made.
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Koutsoumanis K, Allende A, Alvarez‐Ordóñez A, Bolton D, Bover‐Cid S, Chemaly M, Davies R, De Cesare A, Herman L, Hilbert F, Lindqvist R, Nauta M, Ru G, Simmons M, Skandamis P, Suffredini E, Andersson DI, Bampidis V, Bengtsson‐Palme J, Bouchard D, Ferran A, Kouba M, López Puente S, López‐Alonso M, Nielsen SS, Pechová A, Petkova M, Girault S, Broglia A, Guerra B, Innocenti ML, Liébana E, López‐Gálvez G, Manini P, Stella P, Peixe L. Maximum levels of cross-contamination for 24 antimicrobial active substances in non-target feed. Part 11: Sulfonamides. EFSA J 2021; 19:e06863. [PMID: 34729091 PMCID: PMC8546515 DOI: 10.2903/j.efsa.2021.6863] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The specific concentrations of sulfonamides in non-target feed for food-producing animals, below which there would not be an effect on the emergence of, and/or selection for, resistance in bacteria relevant for human and animal health, as well as the specific antimicrobial concentrations in feed which have an effect in terms of growth promotion/increased yield were assessed by EFSA in collaboration with EMA. Details of the methodology used for this assessment, associated data gaps and uncertainties, are presented in a separate document. To address antimicrobial resistance, the Feed Antimicrobial Resistance Selection Concentration (FARSC) model developed specifically for the assessment was applied. However, due to the lack of data on the parameters required to calculate the FARSC, it was not possible to conclude the assessment until further experimental data are available. To address growth promotion, data from scientific publications obtained from an extensive literature review were used. Levels in feed that showed to have an effect on growth promotion/increased yield were identified for three sulfonamides: sulfamethazine, sulfathiazole and sulfamerazine. It was recommended to carry out studies to generate the data that are required to fill the gaps which prevented the calculation of the FARSC for these antimicrobials.
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De Smet J, Boyen F, Croubels S, Rasschaert G, Haesebrouck F, Temmerman R, Rutjens S, De Backer P, Devreese M. The impact of therapeutic-dose induced intestinal enrofloxacin concentrations in healthy pigs on fecal Escherichia coli populations. BMC Vet Res 2020; 16:382. [PMID: 33032597 PMCID: PMC7545837 DOI: 10.1186/s12917-020-02608-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 10/02/2020] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Knowledge of therapy-induced intestinal tract concentrations of antimicrobials allows for interpretation and prediction of antimicrobial resistance selection within the intestinal microbiota. This study describes the impact of three different doses of enrofloxacin (ENR) and two different administration routes on the intestinal concentration of ENR and on the fecal Escherichia coli populations in pigs. Enrofloxacin was administered on three consecutive days to four different treatment groups. The groups either received an oral bolus administration of ENR (conventional or half dose) or an intramuscular administration (conventional or double dose). RESULTS Quantitative analysis of fecal samples showed high ENR concentrations in all groups, ranging from 5.114 ± 1.272 μg/g up to 39.54 ± 10.43 μg/g at the end of the treatment period. In addition, analysis of the luminal intestinal content revealed an increase of ENR concentration from the proximal to the distal intestinal tract segments, with no significant effect of administration route. Fecal samples were also screened for resistance in E. coli isolates against ENR. Wild-type (MIC≤0.125 μg/mL) and non-wild-type (0.125 < MIC≤2 μg/mL) E. coli isolates were found at time 0 h. At the end of treatment (3 days) only non-wild-type isolates (MIC≥32 μg/mL) were found. CONCLUSIONS In conclusion, the observed intestinal ENR concentrations in all groups showed to be both theoretically (based on pharmacokinetic and pharmacodynamic principles) and effectively (in vivo measurement) capable of significantly reducing the intestinal E. coli wild-type population.
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Affiliation(s)
- Joren De Smet
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Filip Boyen
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Siska Croubels
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Geertrui Rasschaert
- Technology and Food Science Unit, Flanders Research Institute for Agriculture, Fisheries and Food, Brusselsesteenweg 370, 9090, Melle, Belgium
| | - Freddy Haesebrouck
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Robin Temmerman
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Sofie Rutjens
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Patrick De Backer
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Mathias Devreese
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium.
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11
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High risk of adverse pregnancy outcomes in women with a persistent lupus anticoagulant. Blood Adv 2020; 3:769-776. [PMID: 30837214 DOI: 10.1182/bloodadvances.2018026948] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 02/04/2019] [Indexed: 11/20/2022] Open
Abstract
Lupus anticoagulant (LA) has been associated with pregnancy complications and pregnancy loss. Identification of predictive factors could aid in deciding on therapeutic management. To identify risk factors for adverse pregnancy outcomes in high-risk women with persistently positive LA, we prospectively followed 82 women of childbearing age, of whom 23 had 40 pregnancies within the Vienna Lupus Anticoagulant and Thrombosis Study. Pregnancy complications occurred in 28/40 (70%) pregnancies, including 22 (55%) spontaneous abortions (<10th week of gestation [WOG]: n = 12, 10th to 24th WOG: n = 10) and 6 deliveries <34th WOG (15%, 3 due to severe preeclampsia/HELLP [hemolysis, elevated liver enzymes, and a low platelet count] syndrome, 3 due to placental insufficiency). One abortion was followed by catastrophic antiphospholipid syndrome. Neither a history of pregnancy complications nor of thrombosis, or prepregnancy antiphospholipid antibody levels were associated with adverse pregnancy outcomes. In logistic regression analysis, higher age was associated with a lower risk of adverse pregnancy outcome (per 5 years' increase: odds ratio [OR] = 0.41, 95% confidence interval [CI]: 0.19-0.87), a high Rosner index (index of circulating anticoagulant) predicted an increased risk (OR = 4.51, 95% CI: 1.08-18.93). Live birth rate was 15/28 (54%) in women on the combination of low-molecular-weight heparin and low-dose aspirin and 3/12 (25%) in those with no treatment or a single agent. We conclude that the risk of severe, even life-threatening pregnancy complications and adverse pregnancy outcomes is very high in women with persistent LA. A high Rosner index indicates an increased risk. Improved treatment options for women with persistently positive LA are urgently needed.
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Rana MS, Lee SY, Kang HJ, Hur SJ. Reducing Veterinary Drug Residues in Animal Products: A Review. Food Sci Anim Resour 2019; 39:687-703. [PMID: 31728441 PMCID: PMC6837901 DOI: 10.5851/kosfa.2019.e65] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 08/20/2019] [Accepted: 09/16/2019] [Indexed: 11/11/2022] Open
Abstract
A survey we conducted suggests that the ingestion of veterinary drug residues in
edible animal parts constitutes a potential health hazard for its consumers,
including, specifically, the possibility of developing multidrug resistance,
carcinogenicity, and disruption of intestinal normal microflora. The survey
results indicated that antibiotics, parasitic drugs, anticoccidial, or
nonsteroidal anti-inflammatory drugs (NSAIDs) are broadly used, and this use in
livestock is associated with the appearance of residues in various animal
products such as milk, meat, and eggs. We observed that different cooking
procedures, heating temperatures, storage times, fermentation, and pH have the
potential to decrease drug residues in animal products. Several studies have
reported the use of thermal treatments and sterilization to decrease the
quantity of antibiotics such as tetracycline, oxytetracycline, macrolides, and
sulfonamides, in animal products. Fermentation treatments also decreased levels
of penicillin and pesticides such as dimethoate, malathion,
Dichlorodiphenyldichloroethylene, and lindane. pH, known to influence decreases
in cloxacillin and oxacillin levels, reportedly enhanced the dissolution of
antimicrobial drug residues. Pressure cooking also reduced aldrin, dieldrin, and
endosulfan in animal products. Therefore, this review provides updated
information on the control of drug residues in animal products, which is of
significance to veterinarians, livestock producers, and consumer health.
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Affiliation(s)
- Md Shohel Rana
- Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Korea
| | - Seung Yun Lee
- Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Korea
| | - Hae Jin Kang
- Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Korea
| | - Sun Jin Hur
- Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Korea
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Xu N, Li M, Fu Y, Zhang X, Ai X, Lin Z. Tissue residue depletion kinetics and withdrawal time estimation of doxycycline in grass carp, Ctenopharyngodon idella, following multiple oral administrations. Food Chem Toxicol 2019; 131:110592. [PMID: 31220539 DOI: 10.1016/j.fct.2019.110592] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/12/2019] [Accepted: 06/14/2019] [Indexed: 12/15/2022]
Abstract
This study aimed to determine the plasma and tissue residue depletion kinetics of doxycycline (DC) in grass carp (Ctenopharyngodon idella) after daily oral administrations at 20 mg/kg for 3 days, and to calculate the corresponding withdrawal times. Following drug administrations, samples of plasma, liver, kidney, gill and muscle + skin were collected at predetermined time points (0.25, 0.5, 1, 3, 5, 7, 14, 21, 28, 35, 42, 49 and 56 days) and analyzed for concentrations of DC using a LC-MS/MS method. The results showed that liver had the highest concentrations and the slowest depletion compared to other tissues, with detectable DC up to 49 days (58.9 ± 12.8 μg/kg). The WT 1.4 software and "reschem" package were used to calculate withdrawal times, and the results were similar. The results suggest a withdrawal time of 41 days for Europe and China and 50 days for Japan is needed for DC in grass carp after 3 daily oral administrations at 20 mg/kg. Overall, this study improves our understanding of the tissue residue depletion kinetics of DC in fish, and the results may help regulatory agencies to determine proper withdrawal periods based on different regulatory standards in different countries to ensure safety of aquatic food products.
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Affiliation(s)
- Ning Xu
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, 430223, China; Institute of Computational Comparative Medicine (ICCM), Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, 66506, USA; Hu Bei Province Engineering and Technology Research Center of Aquatic Product Quality and Safety, Wuhan, 430223, China.
| | - Miao Li
- Institute of Computational Comparative Medicine (ICCM), Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, 66506, USA.
| | - Yu Fu
- Hunan University of Arts and Science, Changde, 415000, China.
| | - Xiaomei Zhang
- Hunan Applied Technology University, Changde, 415000, China.
| | - Xiaohui Ai
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, 430223, China; Hu Bei Province Engineering and Technology Research Center of Aquatic Product Quality and Safety, Wuhan, 430223, China.
| | - Zhoumeng Lin
- Institute of Computational Comparative Medicine (ICCM), Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, 66506, USA.
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14
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De Mulder T, Rasschaert G, Van Coillie E, Van den Meersche T, Haegeman A, Ruttink T, de Wiele TV, Heyndrickx M. Impact of Cross-Contamination Concentrations of Doxycycline Hyclate on the Microbial Ecosystem in an Ex Vivo Model of the Pig's Cecum. Microb Drug Resist 2018; 25:304-315. [PMID: 30234420 DOI: 10.1089/mdr.2018.0034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
AIMS Cross-contamination of feed with antibiotics causes pigs to become unintentionally exposed to low concentrations of antibiotics. This study investigates the effect of residues of doxycycline hyclate (DOX) in an ex vivo model of the intestinal tract of pigs, focusing on the microbial community, microbial activity, and the enrichment of resistant bacteria and resistance genes. RESULTS The effect of three concentrations DOX were tested; 1 and 4 mg/L correspond to the intestinal concentrations when pigs are fed a compound feed containing 3% of a therapeutic dose, and a reference concentration of 16 mg/L. These were continuously administered to a chemostat, simulating the microbial ecosystem of the pig cecum and inoculated with cecal content of organically grown pigs. The administration of even the lowest DOX concentration caused a significant decrease in bacterial activity, while the microbial community profile appeared to remain unaffected by any of the concentrations. A concentration of 1 mg/L DOX caused minor selection pressure for tetracycline-resistant Escherichia coli but no other groups enumerated with plate cultivation, while 4 mg/L induced major enrichment of tetracycline-resistant E. coli, Enterobacteriaceae and total anaerobes. High abundances of tet(Q), tet(M), tet(W), tet(O), and tet(B) were detected in the inoculum and also before antibiotic administration in the chemostat and did not significantly increase during administration of 1 and 4 mg/L DOX. Only 16 mg/L DOX caused minor enrichments. CONCLUSIONS Cross-contamination concentrations of doxycycline, as a result of cross-contamination, cause a selection pressure for resistant bacteria and negatively affect microbial activity.
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Affiliation(s)
- Thijs De Mulder
- 1 Technology and Food Science Unit, Institute for Agricultural and Fisheries Research (ILVO) , Melle, Belgium .,2 Center for Microbial Ecology and Technology (Cmet), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University , Ghent, Belgium
| | - Geertrui Rasschaert
- 1 Technology and Food Science Unit, Institute for Agricultural and Fisheries Research (ILVO) , Melle, Belgium
| | - Els Van Coillie
- 1 Technology and Food Science Unit, Institute for Agricultural and Fisheries Research (ILVO) , Melle, Belgium
| | - Tina Van den Meersche
- 1 Technology and Food Science Unit, Institute for Agricultural and Fisheries Research (ILVO) , Melle, Belgium .,3 Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University , Merelbeke, Belgium
| | - Annelies Haegeman
- 4 Plant Sciences Unit, Institute for Agriculture and Fisheries Research (ILVO) , Melle, Belgium
| | - Tom Ruttink
- 4 Plant Sciences Unit, Institute for Agriculture and Fisheries Research (ILVO) , Melle, Belgium
| | - Tom Van de Wiele
- 2 Center for Microbial Ecology and Technology (Cmet), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University , Ghent, Belgium
| | - Marc Heyndrickx
- 1 Technology and Food Science Unit, Institute for Agricultural and Fisheries Research (ILVO) , Melle, Belgium .,3 Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University , Merelbeke, Belgium
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15
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Qualitative and quantitative drug residue analyses: Chlortetracycline in white-tailed deer (Odocoileus virginianus) and supermarket meat by liquid chromatography tandem-mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2018; 1092:237-243. [DOI: 10.1016/j.jchromb.2018.05.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Revised: 05/10/2018] [Accepted: 05/17/2018] [Indexed: 11/19/2022]
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16
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Filippitzi ME, Chantziaras I, Devreese M, Dewulf J. Probabilistic risk model to assess the potential for resistance selection following the use of anti-microbial medicated feed in pigs. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2018; 35:1266-1277. [DOI: 10.1080/19440049.2018.1461257] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Maria Eleni Filippitzi
- Veterinary Epidemiology Unit, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Ilias Chantziaras
- Porcine Health Management Unit, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Mathias Devreese
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Jeroen Dewulf
- Veterinary Epidemiology Unit, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
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17
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Otero JA, García-Mateos D, Alvarez-Fernández I, García-Villalba R, Espín JC, Álvarez AI, Merino G. Flaxseed-enriched diets change milk concentration of the antimicrobial danofloxacin in sheep. BMC Vet Res 2018; 14:14. [PMID: 29334949 PMCID: PMC5769330 DOI: 10.1186/s12917-018-1341-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 01/08/2018] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Flaxseed is the most common and rich dietary source of lignans and is an acceptable supply of energy for livestock. Flaxseed lignans are precursors of enterolignans, mainly enterolactone and enterodiol, produced by the rumen and intestinal microbiota of mammals and have many important biological properties as phytoestrogens. Potential food-drug interactions involving flaxseed may be relevant for veterinary therapy, and for the quality and safety of milk and dairy products. Our aim was to investigate a potential food-drug interaction involving flaxseed, to explore whether the inclusion of flaxseed in sheep diet affects concentration of the antimicrobial danofloxacin in milk. RESULTS Increased concentrations of enterodiol and enterolactone were observed in sheep plasma and milk after 2 weeks of flaxseed supplementation (P < 0.05). However, enterolactone and enterodiol conjugates were not detected in milk. Milk danofloxacin pharmacokinetics showed that area under the curve (AUC)0-24, maximum concentration (Cmax) and AUC0-24 milk-to-plasma ratios were reduced by 25-30% in sheep fed flaxseed-enriched diets (P < 0.05). Our results demonstrate, therefore, that flaxseed-enriched diets reduce the amount of danofloxacin in sheep milk and enrich the milk content of lignan-derivatives. CONCLUSION These findings highlight an effect of flaxseed-enriched diets on the concentration of antimicrobials in ruminant's milk, revealing the potential of these modified diets for the control of residues of antimicrobial drugs in milk.
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Affiliation(s)
- Jon Andoni Otero
- Department of Biomedical Sciences-Physiology, Veterinary Faculty, University of Leon, 24071, Leon, Spain
- Instituto de Desarrollo Ganadero y Sanidad Animal (INDEGSAL), University of Leon, 24071, Leon, Spain
| | - Dafne García-Mateos
- Department of Biomedical Sciences-Physiology, Veterinary Faculty, University of Leon, 24071, Leon, Spain
- Instituto de Desarrollo Ganadero y Sanidad Animal (INDEGSAL), University of Leon, 24071, Leon, Spain
| | - Indira Alvarez-Fernández
- Instituto de Desarrollo Ganadero y Sanidad Animal (INDEGSAL), University of Leon, 24071, Leon, Spain
| | - Rocío García-Villalba
- Laboratory of Food and Health, Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology, CEBAS-CSIC, 30100, Murcia, Spain
| | - Juan Carlos Espín
- Laboratory of Food and Health, Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology, CEBAS-CSIC, 30100, Murcia, Spain
| | - Ana Isabel Álvarez
- Department of Biomedical Sciences-Physiology, Veterinary Faculty, University of Leon, 24071, Leon, Spain
- Instituto de Desarrollo Ganadero y Sanidad Animal (INDEGSAL), University of Leon, 24071, Leon, Spain
| | - Gracia Merino
- Department of Biomedical Sciences-Physiology, Veterinary Faculty, University of Leon, 24071, Leon, Spain.
- Instituto de Desarrollo Ganadero y Sanidad Animal (INDEGSAL), University of Leon, 24071, Leon, Spain.
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18
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Zhang Z, Chen J, Duan Y, Liu W, Li D, Yan Z, Yang K. Highly luminescent nitrogen-doped carbon dots for simultaneous determination of chlortetracycline and sulfasalazine. LUMINESCENCE 2017; 33:318-325. [PMID: 29044942 DOI: 10.1002/bio.3416] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 08/22/2017] [Accepted: 09/07/2017] [Indexed: 11/12/2022]
Abstract
Here, we have presented a green and facile strategy to fabricate nitrogen-doped carbon dots (N-CDs) and their applications for determination of chlortetracycline (CTC) and sulfasalazine (SSZ). The fluorescent N-CDs, prepared by one-step hydrothermal reaction of citric acid and l-arginine, manifested numerous excellent features containing strong blue fluorescence, good water-solubility, narrow size distribution, and a high fluorescence quantum yield (QY) of 38.8%. Based on the fluorescence quenching effects, the as-synthesized N-CDs as a fluorescent nanosensor exhibited superior analytical performances for quantifying CTC and SSZ. The linear range for CTC was calculated to be from 0.85 to 20.38 μg ml-1 with a low detection limit of 0.078 μg ml-1 . Meanwhile, the linear range for SSZ was estimated to be from 0.34 to 6.76 μg ml-1 with a low detection limit of 0.032 μg ml-1 . Therefore, the N-CDs hold admirable application potential for constructing a fluorescent sensor for pharmaceutical analysis.
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Affiliation(s)
- Zhengwei Zhang
- School of Science, China Pharmaceutical University, Nanjing, P. R. China
| | - Jianqiu Chen
- School of Science, China Pharmaceutical University, Nanjing, P. R. China
| | - Yu Duan
- Engineering Center of State Ministry of Education for Standardization of Chinese Medicine Processing, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Weixia Liu
- School of Science, China Pharmaceutical University, Nanjing, P. R. China
| | - Dan Li
- School of Science, China Pharmaceutical University, Nanjing, P. R. China
| | - Zhengyu Yan
- School of Science, China Pharmaceutical University, Nanjing, P. R. China
| | - Ke Yang
- School of Science, China Pharmaceutical University, Nanjing, P. R. China
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19
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Peeters L, De Mulder T, Van Coillie E, Huygens J, Smet A, Daeseleire E, Dewulf J, Imberechts H, Butaye P, Haesebrouck F, Croubels S, Heyndrickx M, Rasschaert G. Selection and transfer of an IncI1-tet
(A) plasmid of Escherichia coli
in an ex vivo
model of the porcine caecum at doxycycline concentrations caused by crosscontaminated feed. J Appl Microbiol 2017; 123:1312-1320. [DOI: 10.1111/jam.13561] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Revised: 07/18/2017] [Accepted: 08/04/2017] [Indexed: 11/29/2022]
Affiliation(s)
- L.E.J. Peeters
- Department of General Bacteriology; Veterinary and Agrochemical Research centre; Brussels Belgium
- Department of Pathology, Bacteriology and Avian Diseases; Ghent University; Merelbeke Belgium
| | - T. De Mulder
- Technology and Food Science Unit; Institute for Agricultural and Fisheries Research; Melle Belgium
| | - E. Van Coillie
- Technology and Food Science Unit; Institute for Agricultural and Fisheries Research; Melle Belgium
| | - J. Huygens
- Technology and Food Science Unit; Institute for Agricultural and Fisheries Research; Melle Belgium
| | - A. Smet
- Laboratory Experimental Medicine and Pediatrics; Faculty of Medicine and Health Sciences; University of Antwerp; Antwerp Belgium
| | - E. Daeseleire
- Technology and Food Science Unit; Institute for Agricultural and Fisheries Research; Melle Belgium
| | - J. Dewulf
- Veterinary Epidemiology Unit; Department of Reproduction; Obstetrics and Herd health; Ghent University; Merelbeke Belgium
| | - H. Imberechts
- Department of General Bacteriology; Veterinary and Agrochemical Research centre; Brussels Belgium
| | - P. Butaye
- Department of Pathology, Bacteriology and Avian Diseases; Ghent University; Merelbeke Belgium
- Department of Biosciences; Ross University School of Veterinary Medicine; St Kitts and Nevis West Indies
| | - F. Haesebrouck
- Department of Pathology, Bacteriology and Avian Diseases; Ghent University; Merelbeke Belgium
| | - S. Croubels
- Department of Pharmacology, Toxicology and Biochemistry; Ghent University; Merelbeke Belgium
| | - M. Heyndrickx
- Department of Pathology, Bacteriology and Avian Diseases; Ghent University; Merelbeke Belgium
- Technology and Food Science Unit; Institute for Agricultural and Fisheries Research; Melle Belgium
| | - G. Rasschaert
- Technology and Food Science Unit; Institute for Agricultural and Fisheries Research; Melle Belgium
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20
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Effect of residual doxycycline concentrations on resistance selection and transfer in porcine commensal Escherichia coli. Int J Antimicrob Agents 2017; 51:123-127. [PMID: 28668675 DOI: 10.1016/j.ijantimicag.2017.04.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 03/29/2017] [Accepted: 04/01/2017] [Indexed: 11/24/2022]
Abstract
Pig feed may contain various levels of antimicrobial residues due to cross-contamination. A previous study showed that a 3% carry-over level of doxycycline (DOX) in the feed results in porcine faecal concentrations of approximately 4 mg/L. The aim of this study was to determine the effect of residual DOX concentrations (1 and 4 mg/L) in vitro on selection of DOX-resistant porcine commensal Escherichia coli and transfer of their resistance plasmids. Three different DOX-resistant porcine commensal E. coli strains and their plasmids were characterised. These strains were each brought in competition with a susceptible strain in a medium containing 0, 1 and 4 mg/L DOX. Resistant bacteria, susceptible bacteria and transconjugants were enumerated after 24 h and 48 h. The tet(A)-carrying plasmids showed genetic backbones that are also present among human E. coli isolates. Ratios of resistant to susceptible bacteria were significantly higher at 1 and 4 mg/L DOX compared with the blank control, but there was no significant difference between 1 and 4 mg/L. Plasmid transfer frequencies were affected by 1 or 4 mg/L DOX in the medium for only one of the resistance plasmids. In conclusion, DOX concentrations of 1 and 4 mg/L can select for resistant E. coli in vitro. Further research is needed to determine the effect of these concentrations in the complex environment of the porcine intestinal microbiota.
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21
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De Smet J, Croubels S, De Backer P, Devreese M. Effect of administration route and dose alteration on sulfadiazine-trimethoprim plasma and intestinal concentrations in pigs. Int J Antimicrob Agents 2017; 50:707-714. [PMID: 28668685 DOI: 10.1016/j.ijantimicag.2017.06.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 04/14/2017] [Accepted: 06/17/2017] [Indexed: 11/16/2022]
Abstract
Potentiated sulfonamides, such as sulfadiazine-trimethoprim (SDZ-TRIM), are frequently used antimicrobials in both human and veterinary medicine. To optimise their use in relation to the emerging problem of resistance selection, this paper studied the impact of dose and administration route of SDZ-TRIM on the exposure of the gut microbiota to these antimicrobials. An animal experiment was conducted with 36 pigs, divided into six different treatment groups (n = 6). Three different administration routes were outlined: oral (PO) gavage, intramuscular (IM) injection and medicated feed, with 5-day therapy duration. Conventional dosing (30 mg SDZ-TRIM/kg bodyweight [BW]) and half dosing (15 mg SDZ-TRIM/kg BW) was performed for the oral routes in two applications per day. For the IM route, a conventional dose of 15 mg SDZ-TRIM/kg BW or a double dose of 30 mg SDZ-TRIM/kg BW was administered once daily. After daily collection of blood and faeces, the intestinal content of all animals was sampled in different gastrointestinal tract (GIT) segments, and SDZ and TRIM were quantified. Remarkably, SDZ accumulated in distal GIT segments, independently of the administration route. High concentrations (mean ± standard deviation) up to 26.93 ± 8.36 µg/g, 11.15 ± 3.78 µg/g and 19.36 ± 1.86 µg/g after PO gavage, IM administration and medicated feed, respectively, were measured for SDZ. In contrast, TRIM concentrations decreased from proximal to distal segments and were mostly below the limit of quantification (0.025 µg/g). The high oral bioavailability of SDZ indicates gastrointestinal secretion is a substantial elimination route for SDZ.
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Affiliation(s)
- Joren De Smet
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Siska Croubels
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Patrick De Backer
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Mathias Devreese
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium.
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