Sewage sludge and liquid pig manure as possible sources of antibiotic resistant bacteria

Within the last decades, the environmental spread of antibiotic resistant bacteria has become a topic of concern. In this study, liquid pig manure ( n=305) and sewage sludge ( n=111) – used as agricultural fertilizers between 2002 and 2005 – were investigated for the presence of Escherichia coli, En...

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Veröffentlicht in:Environmental research 2010-05, Vol.110 (4), p.318-326
Hauptverfasser: Hölzel, Christina S., Schwaiger, Karin, Harms, Katrin, Küchenhoff, Helmut, Kunz, Anne, Meyer, Karsten, Müller, Christa, Bauer, Johann
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container_end_page 326
container_issue 4
container_start_page 318
container_title Environmental research
container_volume 110
creator Hölzel, Christina S.
Schwaiger, Karin
Harms, Katrin
Küchenhoff, Helmut
Kunz, Anne
Meyer, Karsten
Müller, Christa
Bauer, Johann
description Within the last decades, the environmental spread of antibiotic resistant bacteria has become a topic of concern. In this study, liquid pig manure ( n=305) and sewage sludge ( n=111) – used as agricultural fertilizers between 2002 and 2005 – were investigated for the presence of Escherichia coli, Enterococcus faecalis and Enterococcus faecium. Bacteria were tested for their resistance against 40 chemotherapeutics including several “reserve drugs”. E. coli ( n=613) from pig manure were at a significantly higher degree resistant to streptomycin, doxycycline, spectinomycin, cotrimoxazole, and chloramphenicol than E. coli ( n=116) from sewage sludge. Enterococci ( Ent. faecalis, n=387, and Ent. faecium, n=183) from pig manure were significantly more often resistant to high levels of doxycycline, rifampicin, erythromycin, and streptomycin than Ent. faecalis ( n=44) and Ent. faecium ( n=125) from sewage sludge. Significant differences in enterococcal resistance were also seen for tylosin, chloramphenicol, gentamicin high level, fosfomycin, clindamicin, enrofloxacin, moxifloxacin, nitrofurantoin, and quinupristin/dalfopristin . By contrast, aminopenicillins were more effective in enterococci from pig manure, and mean MIC-values of piperacillin+tazobactam and third generation cefalosporines were significantly lower in E. coli from pig manure than in E. coli from sewage sludge. 13.4% ( E. coli) to 25.3% ( Ent. faecium) of pig manure isolates were high-level multiresistant to substances from more than three different classes of antimicrobial agents. In sewage sludge, high-level-multiresistance reached from 0% ( Ent. faecalis) to 16% ( Ent. faecium). High rates of (multi-) resistant bacteria in pig manure emphasize the need for a prudent – cautious – use of antibiotics in farm animals.
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Significant differences in enterococcal resistance were also seen for tylosin, chloramphenicol, gentamicin high level, fosfomycin, clindamicin, enrofloxacin, moxifloxacin, nitrofurantoin, and quinupristin/dalfopristin . By contrast, aminopenicillins were more effective in enterococci from pig manure, and mean MIC-values of piperacillin+tazobactam and third generation cefalosporines were significantly lower in E. coli from pig manure than in E. coli from sewage sludge. 13.4% ( E. coli) to 25.3% ( Ent. faecium) of pig manure isolates were high-level multiresistant to substances from more than three different classes of antimicrobial agents. In sewage sludge, high-level-multiresistance reached from 0% ( Ent. faecalis) to 16% ( Ent. faecium). 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Significant differences in enterococcal resistance were also seen for tylosin, chloramphenicol, gentamicin high level, fosfomycin, clindamicin, enrofloxacin, moxifloxacin, nitrofurantoin, and quinupristin/dalfopristin . By contrast, aminopenicillins were more effective in enterococci from pig manure, and mean MIC-values of piperacillin+tazobactam and third generation cefalosporines were significantly lower in E. coli from pig manure than in E. coli from sewage sludge. 13.4% ( E. coli) to 25.3% ( Ent. faecium) of pig manure isolates were high-level multiresistant to substances from more than three different classes of antimicrobial agents. In sewage sludge, high-level-multiresistance reached from 0% ( Ent. faecalis) to 16% ( Ent. faecium). 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Significant differences in enterococcal resistance were also seen for tylosin, chloramphenicol, gentamicin high level, fosfomycin, clindamicin, enrofloxacin, moxifloxacin, nitrofurantoin, and quinupristin/dalfopristin . By contrast, aminopenicillins were more effective in enterococci from pig manure, and mean MIC-values of piperacillin+tazobactam and third generation cefalosporines were significantly lower in E. coli from pig manure than in E. coli from sewage sludge. 13.4% ( E. coli) to 25.3% ( Ent. faecium) of pig manure isolates were high-level multiresistant to substances from more than three different classes of antimicrobial agents. In sewage sludge, high-level-multiresistance reached from 0% ( Ent. faecalis) to 16% ( Ent. faecium). High rates of (multi-) resistant bacteria in pig manure emphasize the need for a prudent – cautious – use of antibiotics in farm animals.</abstract><cop>Amsterdam</cop><pub>Elsevier Inc</pub><pmid>20303077</pmid><doi>10.1016/j.envres.2010.02.009</doi><tpages>9</tpages></addata></record>
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subjects Animals
Anti-Bacterial Agents - pharmacology
Antibiotics
Antibiotics. Antiinfectious agents. Antiparasitic agents
Antimicrobial resistance
Bacteria
Biological and medical sciences
Drug Resistance, Bacterial
Enterococcus faecalis
Enterococcus faecalis - drug effects
Enterococcus faecalis - genetics
Enterococcus faecalis - isolation & purification
Enterococcus faecium
Enterococcus faecium - drug effects
Enterococcus faecium - genetics
Enterococcus faecium - isolation & purification
Environmental Monitoring
Escherichia coli
Escherichia coli - drug effects
Escherichia coli - genetics
Escherichia coli - isolation & purification
Farms
Fertilizers - microbiology
General aspects
Liquid pig manure
Liquids
Manure
Manure - microbiology
Medical sciences
Microbial Sensitivity Tests
Multiresistance
Outpatients
Pharmacology. Drug treatments
Sewage - microbiology
Sewage sludge
Streptomycin
Swine
title Sewage sludge and liquid pig manure as possible sources of antibiotic resistant bacteria
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