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Lepczyński A, Herosimczyk A, Bucław M, Adaszyńska-Skwirzyńska M. Antibiotics in avian care and husbandry-status and alternative antimicrobials. PHYSICAL SCIENCES REVIEWS 2023. [DOI: 10.1515/psr-2021-0123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Abstract
Undoubtedly, the discovery of antibiotics was one of the greatest milestones in the treatment of human and animal diseases. Due to their over-use mainly as antibiotic growth promoters (AGP) in livestock farming, antimicrobial resistance has been reported with increasing intensity, especially in the last decades. In order to reduce the scale of this phenomenon, initially in the Scandinavian countries and then throughout the entire European Union, a total ban on the use of AGP was introduced, moreover, a significant limitation in the use of these feed additives is now observed almost all over the world. The withdrawal of AGP from widespread use has prompted investigators to search for alternative strategies to maintain and stabilize the composition of the gut microbiota. These strategies include substances that are used in an attempt to stimulate the growth and activity of symbiotic bacteria living in the digestive tract of animals, as well as living microorganisms capable of colonizing the host’s gastrointestinal tract, which can positively affect the composition of the intestinal microbiota by exerting a number of pro-health effects, i.e., prebiotics and probiotics, respectively. In this review we also focused on plants/herbs derived products that are collectively known as phytobiotic.
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Affiliation(s)
- Adam Lepczyński
- Department of Physiology, Cytobiology and Proteomics , West Pomeranian University of Technology , Szczecin , Poland
| | - Agnieszka Herosimczyk
- Department of Physiology, Cytobiology and Proteomics , West Pomeranian University of Technology , Szczecin , Poland
| | - Mateusz Bucław
- Department of Monogastric Animal Sciences , West Pomeranian University of Technology , Szczecin , Poland
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Qi N, Liu S, Yan F, Chen B, Wu S, Lin X, Yan Z, Zhou Q, Liao S, Li J, Lv M, Cai H, Hu J, Zhang J, Gu Y, Sun M. Study of microencapsulated fatty acid antimicrobial activity in vitro and its prevention ability of Clostridium perfringens induced necrotic enteritis in broiler chicken. Gut Pathog 2023; 15:1. [PMID: 36593526 PMCID: PMC9808942 DOI: 10.1186/s13099-022-00526-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Accepted: 12/19/2022] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Necrotic enteritis (NE) is an infectious intestinal disease caused by Clostridium perfringens (C. perfringens) that is now re-emerging and causing concern within the poultry industry. Previously, the supplementation of antibiotics in feed was the most popular control strategy against C. perfringens. However, with the ban on supplementing growth-promoting antibiotics in livestock feed, alternatives to antibiotics will be essential in order to control necrotic enteritis. A possible alternative to antibiotics could be the medium or long chain fatty acids (MCFA or LCFA) as these are able to destroy cell membranes which in turn results in the death of bacteria. In this study, the in vitro antimicrobial activity of different combinations with microencapsulated caprylic acid (C8: 0), capric acid (C10: 0), lauric acid (C12: 0) and myristic acid (C14: 0) against C. perfringens and in vivo control the NE-inducing C. perfringens in broiler chicken were analyzed. RESULTS The minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) assay results revealed that three different combinations of medium/long chain fatty acids varied in antimicrobial activities against C. perfringens type A strain (CVCC52, quality control), C. perfringens type A strain (C8-1), C. perfringens type G strain (D25) and C. perfringens type G strain (MZ1). Specifically, combination of C12: 0 and C14: 0 (C12-14) showed the highest antimicrobial activity against the four strains of C. perfringens (MIC ≤ 12.5 μg/mL, MBC = 50 μg/mL), followed by the combination of C10: 0 and C12: 0 (C10-12) (MIC, MBC ≤ 50 μg/mL). The in vivo study, 189 of 818-crossbred chickens that were fed a wheat-based diet and randomly divided into nine groups, with six treatment groups supplemented with either a high dose (1 g/kg) or low dose (0.5 g/kg) of three combinations respectively. The remaining three groups comsisted of a positive group supplement with avilamycin (0.01 g/kg), an infected control and an uninfected control. All chickens were challenged with C. perfringens from day 14 to day 17, except those in the uninfected control group. On day 20, the duodenum and jejunum necrotic lesions scores were calculated and the results showed that there was significant decrease in the C12-C14 high dose group (1.43 ± 0.23, 0.48 ± 0.13) and the C10-12 high dose group (1.52 ± 0.19, 0.48 ± 0.11) compared to the infected group (2.86 ± 0.21, 1.20 ± 0.28). CONCLUSIONS This finding indicated that dietary microencapsulated C12-C14 and C10-C12 could inhibit the growth of C. perfringens in chickens, which proves is viability to serve as an alternative to antibiotics used for necrotic enteritis caused by C. perfringens.
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Affiliation(s)
- Nanshan Qi
- grid.135769.f0000 0001 0561 6611Key Laboratory of Livestock Disease Prevention of Guangdong Province, Key Laboratory of Avian Influenza and Other Major Poultry Diseases Prevention and Control, Ministry of Agriculture and Rural Affairs, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640 Guangdong People’s Republic of China
| | - Shaobing Liu
- grid.135769.f0000 0001 0561 6611Key Laboratory of Livestock Disease Prevention of Guangdong Province, Key Laboratory of Avian Influenza and Other Major Poultry Diseases Prevention and Control, Ministry of Agriculture and Rural Affairs, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640 Guangdong People’s Republic of China ,grid.443368.e0000 0004 1761 4068College of Animal Science and Technology, Anhui Science and Technology University, Fengyang, 233100 Anhui People’s Republic of China
| | - Fangquan Yan
- Guangzhou Wisdom Bio-Technology Co., Ltd, Guangzhou, 510700 Guangdong People’s Republic of China
| | - Bing Chen
- Guangzhou Wisdom Bio-Technology Co., Ltd, Guangzhou, 510700 Guangdong People’s Republic of China
| | - Shilin Wu
- Guangzhou Wisdom Bio-Technology Co., Ltd, Guangzhou, 510700 Guangdong People’s Republic of China
| | - Xuhui Lin
- grid.135769.f0000 0001 0561 6611Key Laboratory of Livestock Disease Prevention of Guangdong Province, Key Laboratory of Avian Influenza and Other Major Poultry Diseases Prevention and Control, Ministry of Agriculture and Rural Affairs, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640 Guangdong People’s Republic of China
| | - Zhuanqiang Yan
- Wen’s Group Academy, Wen’s Foodstuffs Group Co., Ltd., Xinxing, 527400 Guangdong People’s Republic of China
| | - Qingfeng Zhou
- Wen’s Group Academy, Wen’s Foodstuffs Group Co., Ltd., Xinxing, 527400 Guangdong People’s Republic of China
| | - Shenquan Liao
- grid.135769.f0000 0001 0561 6611Key Laboratory of Livestock Disease Prevention of Guangdong Province, Key Laboratory of Avian Influenza and Other Major Poultry Diseases Prevention and Control, Ministry of Agriculture and Rural Affairs, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640 Guangdong People’s Republic of China
| | - Juan Li
- grid.135769.f0000 0001 0561 6611Key Laboratory of Livestock Disease Prevention of Guangdong Province, Key Laboratory of Avian Influenza and Other Major Poultry Diseases Prevention and Control, Ministry of Agriculture and Rural Affairs, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640 Guangdong People’s Republic of China
| | - Minna Lv
- grid.135769.f0000 0001 0561 6611Key Laboratory of Livestock Disease Prevention of Guangdong Province, Key Laboratory of Avian Influenza and Other Major Poultry Diseases Prevention and Control, Ministry of Agriculture and Rural Affairs, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640 Guangdong People’s Republic of China
| | - Haiming Cai
- grid.135769.f0000 0001 0561 6611Key Laboratory of Livestock Disease Prevention of Guangdong Province, Key Laboratory of Avian Influenza and Other Major Poultry Diseases Prevention and Control, Ministry of Agriculture and Rural Affairs, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640 Guangdong People’s Republic of China
| | - Junjing Hu
- grid.135769.f0000 0001 0561 6611Key Laboratory of Livestock Disease Prevention of Guangdong Province, Key Laboratory of Avian Influenza and Other Major Poultry Diseases Prevention and Control, Ministry of Agriculture and Rural Affairs, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640 Guangdong People’s Republic of China
| | - Jianfei Zhang
- grid.135769.f0000 0001 0561 6611Key Laboratory of Livestock Disease Prevention of Guangdong Province, Key Laboratory of Avian Influenza and Other Major Poultry Diseases Prevention and Control, Ministry of Agriculture and Rural Affairs, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640 Guangdong People’s Republic of China
| | - Youfang Gu
- grid.443368.e0000 0004 1761 4068College of Animal Science and Technology, Anhui Science and Technology University, Fengyang, 233100 Anhui People’s Republic of China
| | - Mingfei Sun
- grid.135769.f0000 0001 0561 6611Key Laboratory of Livestock Disease Prevention of Guangdong Province, Key Laboratory of Avian Influenza and Other Major Poultry Diseases Prevention and Control, Ministry of Agriculture and Rural Affairs, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640 Guangdong People’s Republic of China
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Mangano K, Marks J, Klepacki D, Saha CK, Atkinson GC, Vázquez-Laslop N, Mankin AS. Context-based sensing of orthosomycin antibiotics by the translating ribosome. Nat Chem Biol 2022; 18:1277-1286. [PMID: 36138139 DOI: 10.1038/s41589-022-01138-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 08/10/2022] [Indexed: 11/09/2022]
Abstract
Orthosomycin antibiotics inhibit protein synthesis by binding to the large ribosomal subunit in the tRNA accommodation corridor, which is traversed by incoming aminoacyl-tRNAs. Structural and biochemical studies suggested that orthosomycins block accommodation of any aminoacyl-tRNAs in the ribosomal A-site. However, the mode of action of orthosomycins in vivo remained unknown. Here, by carrying out genome-wide analysis of antibiotic action in bacterial cells, we discovered that orthosomycins primarily inhibit the ribosomes engaged in translation of specific amino acid sequences. Our results reveal that the predominant sites of orthosomycin-induced translation arrest are defined by the nature of the incoming aminoacyl-tRNA and likely by the identity of the two C-terminal amino acid residues of the nascent protein. We show that nature exploits this antibiotic-sensing mechanism for directing programmed ribosome stalling within the regulatory open reading frame, which may control expression of an orthosomycin-resistance gene in a variety of bacterial species.
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Affiliation(s)
- Kyle Mangano
- Center for Biomolecular Sciences, University of Illinois at Chicago, Chicago, IL, USA.,Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, IL, USA.,Amgen Research, Thousand Oaks, CA, USA
| | - James Marks
- Center for Biomolecular Sciences, University of Illinois at Chicago, Chicago, IL, USA.,Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, IL, USA.,National Institute of Arthritis and Musculoskeletal and Skin Disease, Bethesda, MD, USA
| | - Dorota Klepacki
- Center for Biomolecular Sciences, University of Illinois at Chicago, Chicago, IL, USA.,Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, IL, USA
| | - Chayan Kumar Saha
- Department of Experimental Medicine, Lund University, Lund, Sweden.,Department of Molecular Biology, Umeå University, Umeå, Sweden
| | - Gemma C Atkinson
- Department of Experimental Medicine, Lund University, Lund, Sweden
| | - Nora Vázquez-Laslop
- Center for Biomolecular Sciences, University of Illinois at Chicago, Chicago, IL, USA. .,Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, IL, USA.
| | - Alexander S Mankin
- Center for Biomolecular Sciences, University of Illinois at Chicago, Chicago, IL, USA. .,Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, IL, USA.
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Rybarczyk A, Bogusławska-Wąs E, Łupkowska A. Effect of EM® probiotic on gut microbiota, growth performance, carcass and meat quality of pigs. Livest Sci 2020. [DOI: 10.1016/j.livsci.2020.104206] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Liu S, Li Y, Yue C, Zhang D, Su X, Yan X, Yang K, Chen X, Zhuo G, Cai T, Liu J, Peng X, Hou R. Isolation and characterization of Uropathogenic Escherichia coli (UPEC) from red panda (Ailurus fulgens). BMC Vet Res 2020; 16:404. [PMID: 33109179 PMCID: PMC7590469 DOI: 10.1186/s12917-020-02624-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 10/15/2020] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Disease prevention and control is a significant part in the ex-situ conservation of the endangered red panda (Ailurus fulgens), being bacterial infection is one of the most important health threats to the captive population. To date, studies about the infection caused by Escherichia coli in the red panda are scarce. This study was conducted to determine the cause of death of a captive red panda through clinical symptoms, complete blood count, biochemical analysis, pathological diagnosis and bacterial whole genome sequencing. CASE PRESENTATION The following report describes a case of a 1.5 year old captive red panda (Ailurus fulgens) that was found lethargic and anorectic. She was moved to the quarantine area for daily treatment with 50 mg of Cefpodoxime Proxetil. During the three-day treatment, she did not eat or defecate, and then died. Clinical hematology revealed the values of neutrophils, alanine aminotransferase (ALT), aspartate aminotransferase (AST) and blood urea nitrogen (BUN) were significantly higher. Histological analysis demonstrated major pathological damage in the kidneys, liver and lungs, characterized by hyperemia, parenchymal cell degeneration and necrosis and inflammatory cell infiltration which were predominantly neutrophilic. A bacterial strain confirmed as Escherichia coli was isolated post mortem. Whole genome sequencing of the E. coli showed the complete genome size was 4.99 Mbp. PapA, PapC, OmpA, OmpU and other virulence factors which specific to Uropathogenic Escherichia coli (UPEC) were found in the isolate. Among the virulence factors, P pili, type I pili and related factors of the iron uptake system were associated with nephrotoxicity. CONCLUSION The red panda died of bacterial infection caused by an uropathogenic strain of Escherichia coli. The pathogenic mechanisms of the strain are closely related to the expression of specific virulence genes.
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Affiliation(s)
- Songrui Liu
- Chengdu Research Base of Giant Panda Breeding, Chengdu, 610081, Sichuan, China
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, Chengdu, 610081, Sichuan, China
- Sichuan Academy of Giant Panda, Chengdu, 610081, Sichuan, China
| | - Yunli Li
- Chengdu Research Base of Giant Panda Breeding, Chengdu, 610081, Sichuan, China
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, Chengdu, 610081, Sichuan, China
- Sichuan Academy of Giant Panda, Chengdu, 610081, Sichuan, China
| | - Chanjuan Yue
- Chengdu Research Base of Giant Panda Breeding, Chengdu, 610081, Sichuan, China
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, Chengdu, 610081, Sichuan, China
- Sichuan Academy of Giant Panda, Chengdu, 610081, Sichuan, China
| | - Dongsheng Zhang
- Chengdu Research Base of Giant Panda Breeding, Chengdu, 610081, Sichuan, China
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, Chengdu, 610081, Sichuan, China
- Sichuan Academy of Giant Panda, Chengdu, 610081, Sichuan, China
| | - Xiaoyan Su
- Chengdu Research Base of Giant Panda Breeding, Chengdu, 610081, Sichuan, China
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, Chengdu, 610081, Sichuan, China
- Sichuan Academy of Giant Panda, Chengdu, 610081, Sichuan, China
| | - Xia Yan
- Chengdu Research Base of Giant Panda Breeding, Chengdu, 610081, Sichuan, China
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, Chengdu, 610081, Sichuan, China
- Sichuan Academy of Giant Panda, Chengdu, 610081, Sichuan, China
| | - Kuixing Yang
- Chengdu Research Base of Giant Panda Breeding, Chengdu, 610081, Sichuan, China
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, Chengdu, 610081, Sichuan, China
- Sichuan Academy of Giant Panda, Chengdu, 610081, Sichuan, China
| | - Xin Chen
- Chengdu Research Base of Giant Panda Breeding, Chengdu, 610081, Sichuan, China
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, Chengdu, 610081, Sichuan, China
- Sichuan Academy of Giant Panda, Chengdu, 610081, Sichuan, China
| | - Guifu Zhuo
- Chengdu Research Base of Giant Panda Breeding, Chengdu, 610081, Sichuan, China
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, Chengdu, 610081, Sichuan, China
- Sichuan Academy of Giant Panda, Chengdu, 610081, Sichuan, China
| | - Tong Cai
- Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), Nanchong, 637009, Sichuan, China
- College of Life Science, China West Normal University, Nanchong, 637009, Sichuan, China
| | - Jiangfeng Liu
- Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), Nanchong, 637009, Sichuan, China
- College of Life Science, China West Normal University, Nanchong, 637009, Sichuan, China
| | - Xi Peng
- Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), Nanchong, 637009, Sichuan, China.
- College of Life Science, China West Normal University, Nanchong, 637009, Sichuan, China.
| | - Rong Hou
- Chengdu Research Base of Giant Panda Breeding, Chengdu, 610081, Sichuan, China.
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, Chengdu, 610081, Sichuan, China.
- Sichuan Academy of Giant Panda, Chengdu, 610081, Sichuan, China.
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Lay KK, Koowattananukul C, Chansong N, Chuanchuen R. Antimicrobial Resistance, Virulence, and Phylogenetic Characteristics ofEscherichia coliIsolates from Clinically Healthy Swine. Foodborne Pathog Dis 2012; 9:992-1001. [DOI: 10.1089/fpd.2012.1175] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Khin Khin Lay
- Department of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - Chailai Koowattananukul
- Department of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - Nisit Chansong
- Animal Health Business Unit, Novatis (Thailand) Ltd., Bangkok, Thailand
| | - Rungtip Chuanchuen
- Department of Veterinary Public Health, Faculty of Veterinary Science; Center for Antimicrobial Resistance Monitoring in Foodborne Pathogens; Global Foodborne Infections Network: South-East Asia and Western Pacific Region, Chulalongkorn University, Bangkok, Thailand
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Hölzel C, Harms K, Küchenhoff H, Kunz A, Müller C, Meyer K, Schwaiger K, Bauer J. Phenotypic and genotypic bacterial antimicrobial resistance in liquid pig manure is variously associated with contents of tetracyclines and sulfonamides. J Appl Microbiol 2010; 108:1642-56. [DOI: 10.1111/j.1365-2672.2009.04570.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Aarestrup FM, Wegener HC, Collignon P. Resistance in bacteria of the food chain: epidemiology and control strategies. Expert Rev Anti Infect Ther 2008; 6:733-50. [PMID: 18847409 DOI: 10.1586/14787210.6.5.733] [Citation(s) in RCA: 240] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Bacteria have evolved multiple mechanisms for the efficient evolution and spread of antimicrobial resistance. Modern food production facilitates the emergence and spread of resistance through the intensive use of antimicrobial agents and international trade of both animals and food products. The main route of transmission between food animals and humans is via food products, although other modes of transmission, such as direct contact and through the environment, also occur. Resistance can spread as resistant pathogens or via transferable genes in different commensal bacteria, making quantification of the transmission difficult. The exposure of humans to antimicrobial resistance from food animals can be controlled by either limiting the selective pressure from antimicrobial usage or by limiting the spread of the bacteria/genes. A number of control options are reviewed, including drug licensing, removing financial incentives, banning or restricting the use of certain drugs, altering prescribers behavior, improving animal health, improving hygiene and implementing microbial criteria for certain types of resistant pathogens for use in the control of trade of both food animals and food.
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Affiliation(s)
- Frank M Aarestrup
- National Food Institute, Technical University of Denmark, Copenhagen V, Denmark.
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Katsunuma Y, Hanazumi M, Fujisaki H, Minato H, Hashimoto Y, Yonemochi C. Influence of avilamycin administration and its subsequent withdrawal on emergence and disappearance of antimicrobial resistance in enterococci in the intestine of broiler chickens. J Appl Microbiol 2007; 102:1159-66. [PMID: 17381760 DOI: 10.1111/j.1365-2672.2006.03140.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS To investigate the influence of avilamycin (AVM) administration and its subsequent withdrawal on the emergence and disappearance of AVM-resistant enterococci in the intestine of broiler chickens. METHODS AND RESULTS Five chicks each of C, L and H groups were given the basal diet, the basal diet supplemented with 5 g AVM/ton and the basal diet supplemented with 50 g AVM/ton, respectively. The AVM-resistant Enterococcus faecalis population did not emerge during 30 days of the AVM administration period, whereas the AVM-resistant Enterococcus faecium with a minimum inhibitory concentration of >512 microg ml(-1) in the faeces of chicks of the L and H groups emerged on 3 and 1 days after the AVM administration, respectively. Thereafter, the AVM-resistant Ent. faecium population density in both L and H groups maintained high levels during the AVM administration period. Twenty days after the AVM withdrawal, the AVM-resistant Ent. faecium population disappeared from the intestines of both four of five chicks of L group and three of five chicks of H group. The AVM-resistant Ent. faecium population density in one chick from each of the groups, L and H, did not change before and after the AVM removal. CONCLUSIONS The AVM-resistant Ent. faecium emerged during the AVM administration, and disappeared from the intestine of most chicks after the AVM withdrawal. However, the AVM-resistant Ent. faecium persisted in some chicks 20 days after AVM withdrawal. SIGNIFICANCE AND IMPACT OF THE STUDY Our results suggest that introducing an AVM withdrawal period could minimize the risk of AVM-resistant Ent. faecium becoming carcass contaminants, and that prudent antibiotic use alone is not sufficient to stem emergence of the AVM-resistant Ent. faecium.
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Affiliation(s)
- Y Katsunuma
- Scientific Feeds Research Center, Japan Scientific Feeds Association, Narita-city, Chiba, Japan.
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Katsunuma Y, Hanazumi M, Fujisaki H, Minato H, Hashimoto Y, Yonemochi C. REPLY. J Appl Microbiol 2007. [DOI: 10.1111/j.1365-2672.2007.03500.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Silley P, Shryock T, Simjee S, Fukumoto K. Influence of avilamycin administration and its subsequent withdrawal on emergence and disappearance of antimicrobial resistance in enterococci in the intestine of broiler chickens. J Appl Microbiol 2007; 103:2730-1; author reply 2732. [DOI: 10.1111/j.1365-2672.2007.03499.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Diarrassouba F, Diarra MS, Bach S, Delaquis P, Pritchard J, Topp E, Skura BJ. Antibiotic resistance and virulence genes in commensal Escherichia coli and Salmonella isolates from commercial broiler chicken farms. J Food Prot 2007; 70:1316-27. [PMID: 17612058 DOI: 10.4315/0362-028x-70.6.1316] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Antibiotic resistance patterns and the presence of antibiotic and virulence determinants in 74 sorbitol-negative Escherichia coli and 62 Salmonella isolates from nine different broiler chicken farms were investigated. Each farm was supplied by one of three companies that used different antimicrobial agents in feed for growth promotion. The isolates were identified by API 20E for E. coli and by serological tests for Salmonella. The susceptibility of the isolates to antibiotics was determined by Sensititre using the Clinical and Laboratory Standards Institute's breakpoints. Fifty-two E. coli isolates (70.3%) and nine Salmonella isolates (14.52%) were multiresistant to at least nine antibiotics. The multiresistant isolates were evaluated for the presence of tetracycline resistance, integron class 1, and blacMY 2 genes by PCR. Of the 74 E. coli isolates, 55 were resistant to amoxicillin and ceftiofur. Among these 55 resistant E. coli isolates, 45 (81.8%) and 22 (40.0%) were positive for blacMY-2 and qacEdeltal-Sull genes, respectively. Tetracycline resistance was found in 56 isolates (75.8%) among which 12 (21.4%) and 24 (42.9%) gave positive results for tetA and tetB, respectively. Virulence genes (iss, tsh, and traT), aerobactin operon (iucC), and the eaeA gene were detected in some E. coli strains. Among the 27 amoxicillin- and ceftiofur-resistant Salmonella isolates, the blacMY-2 gene was detected in 22 isolates. The class 1 integron gene (qacEdeltal-Sull) was not detected in any Salmonella isolates, whereas the invasin (inv) and virulence (spy) genes were found in 61 (98.4%) and 26 (42%) of the Salmonella isolates, respectively. This study indicated that multiple antibiotic-resistant commensal E. coli and Salmonella strains carrying virulence genes can be found on commercial broiler chicken farms and may provide a reservoir for these genes in chicken production facilities. Except for the presence of tetB, there was no significant effect of feed formulations on the phenotypic or genotypic characteristics of the isolates.
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Affiliation(s)
- Fatoumata Diarrassouba
- Pacific Agri-Food Research Centre, Agriculture and Agri-Food Canada, Agassiz, British Columbia, Canada
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