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Susceptibility

In Vitro Antibiotic Susceptibility Pattern of Non-diphtheriae Corynebacterium Isolates in Ontario, Canada, from 2011 to 2016

Alefiya Neemuchwala, Deidre Soares, Vithusha Ravirajan, Alex Marchand-Austin, Julianne V. Kus, Samir N. Patel
Alefiya Neemuchwala
aPublic Health Ontario Laboratory, Public Health Ontario, Toronto, Ontario, Canada
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Deidre Soares
aPublic Health Ontario Laboratory, Public Health Ontario, Toronto, Ontario, Canada
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Vithusha Ravirajan
aPublic Health Ontario Laboratory, Public Health Ontario, Toronto, Ontario, Canada
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Alex Marchand-Austin
aPublic Health Ontario Laboratory, Public Health Ontario, Toronto, Ontario, Canada
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Julianne V. Kus
aPublic Health Ontario Laboratory, Public Health Ontario, Toronto, Ontario, Canada
bDepartment of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
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Samir N. Patel
aPublic Health Ontario Laboratory, Public Health Ontario, Toronto, Ontario, Canada
bDepartment of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
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DOI: 10.1128/AAC.01776-17
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  • TABLE 1

    In vitro susceptibilities of the Corynebacterium isolates received at the PHOL from 2011 to 2016

    Antimicrobial agent by organismNo. of isolatesMIC rangeMIC50MIC90% Sa
    All Corynebacterium spp.1,970
        Penicillin1,970≤0.06 to >84>814.5
        Ampicillin1,969≤0.12 to >82>8ND
        Oxacillin1,969≤0.25 to >4>4>4ND
        Erythromycin1,970≤0.25 to >4>4>415.1
        Clindamycin1,958≤0.5 to >2>2>28.7
        Ciprofloxacin1,959≤1 to >2>2>226.9
        Levofloxacin1,968≤0.25 to >4>4>4ND
        Moxifloxacinb1,968≤0.25 to >4>4>427.7
        Tetracycline1,969≤2 to >16≤2>1664.2
        Vancomycin1,970≤0.25 to 20.50.5100
        Trimethoprim-sulfamethoxazole1,967≤0.5 to >44>438.1
        Tigecycline1,967≤0.03 to >0.50.120.25ND
        Rifampin1,968≤0.5 to>4≤0.5≤0.591.4
        Quinupristin-dalfopristin1,969≤0.5 to >4≤0.5193.3
        Linezolid1,969≤1 to 2≤1≤1100
        Gentamicin1,970≤2 to >16≤2493.3
        Daptomycin1,959≤0.5 to >4≤0.5≤0.597.7
        Chloramphenicol1,960≤2 to >164>16ND
        Nitrofurantoin1,969≤32 to >64>64>64ND
    C. striatum931
        Penicillin931≤0.06 to >88>80.1
        Ampicillin930≤0.12 to >84>8ND
        Oxacillin930≤0.25 to >4>4>4ND
        Erythromycin931≤0.25to >4>4>414.6
        Clindamycin922≤0.5 to >2>2>25.4
        Ciprofloxacin926≤1 to >2>2>24.6
        Levofloxacin930≤0.25 to >4>4>4ND
        Moxifloxacinb929≤0.25 to >4>4>45.2
        Tetracycline930≤2 to >16>16>1634.7
        Vancomycin931≤0.25 to 10.50.5100
        Trimethoprim-sulfamethoxazole928≤0.5 to >4>4>411.5
        Tigecycline929≤0.03 to >0.50.120.25ND
        Rifampin930≤0.5 to >4≤0.5>485.6
        Quinupristin-dalfopristin930≤0.5 to 2≤0.5≤0.599.4
        Linezolid930≤1≤1≤1100
        Gentamicin931≤2 to >16≤2492.8
        Daptomycin924≤0.5 to>4≤0.5≤0.598
        Chloramphenicol924≤2 to >16≤216ND
        Nitrofurantoin930≤32 to >64>64>64ND
    C. amycolatum190
        Penicillin190≤0.06 to >81>810.5
        Ampicillin190≤0.12 to >81>8ND
        Oxacillin190≤0.25 to >4>4>4ND
        Erythromycin190≤0.25 to >4>4>415.8
        Clindamycin189≤0.5 to>2>2>220.5
        Ciprofloxacin189≤1 to >2>2>226.8
        Levofloxacin190≤0.25 to >4>4>4ND
        Moxifloxacinb190≤0.25 to >44>427.4
        Tetracycline190≤2 to >16≤21685.8
        Vancomycin190≤0.25 to 10.50.5100
        Trimethoprim-sulfamethoxazole190≤0.5 to >41>466.8
        Tigecycline189≤0.03 to >0.50.120.25ND
        Rifampin190≤0.5 to >4≤0.5≤0.598.4
        Quinupristin-dalfopristin190≤0.5 to 2≤0.5≤0.599.5
        Linezolid190≤1≤1≤1100
        Gentamicin190≤2 to >16≤2493.2
        Daptomycin190≤0.5 to 2≤0.5≤0.599.5
        Chloramphenicol189≤2 to >16≤216ND
        Nitrofurantoin190≤32 to >64>64>64ND
    C. pseudodiphtheriticum/C. propinquum216
        Penicillin216≤0.06 to 4≤0.06≤0.0695.8
        Ampicillin216≤0.12 to 4≤0.12≤0.12ND
        Oxacillin216≤0.25 to >40.51ND
        Erythromycin216≤0.25 to >4>4>421.3
        Clindamycin216≤0.5 to >2>2>220.8
        Ciprofloxacin216≤1 to >2≤1>278.7
        Levofloxacin216≤0.25 to >41>4ND
        Moxifloxacinb216≤0.25 to >4≤0.25>479.2
        Tetracycline216≤2 to >16≤2≤298.6
        Vancomycin216≤0.25 to 20.50.5100
        Trimethoprim-sulfamethoxazole216≤0.5 to >4≤0.5487.5
        Tigecycline216≤0.03 to >0.50.060.25ND
        Rifampin216≤0.5 to 1≤0.5≤0.5100
        Quinupristin-dalfopristin216≤0.5 to 1≤0.5≤0.5100
        Linezolid216≤1 to 2≤1≤1100
        Gentamicin216≤2≤2≤2100
        Daptomycin216≤0.5 to >4≤0.5≤0.599.5
        Chloramphenicol216≤2 to >164>16ND
        Nitrofurantoin216≤32 to >64>64>64ND
    C. afermentans subsp. afermentans89
        Penicillin89≤0.06 to >84>81.12
        Ampicillin89≤0.12 to >848ND
        Oxacillin89≤0.25 to >4>4>4ND
        Erythromycin892 to >4>4>40
        Clindamycin891 to >2>2>20
        Ciprofloxacin89≤1 to >2>2>230.3
        Levofloxacin89≤0.25 to >4>4>4ND
        Moxifloxacinb89≤0.25 to >4>4>431.5
        Tetracycline89≤2 to >16≤2887.6
        Vancomycin89≤0.25 to 1≤0.250.50100
        Trimethoprim-sulfamethoxazole89≤0.5 to>42>455.1
        Tigecycline89≤0.03 to >0.50.120.25ND
        Rifampin89≤0.5 to >4≤0.5≤0.594.4
        Quinupristin-dalfopristin89≤0.5 to >41451.7
        Linezolid89≤1 to 2≤1≤1100
        Gentamicin89≤2 to >16≤2≤298.9
        Daptomycin89≤0.5 to 4≤0.5≤0.597.8
        Chloramphenicol89≤2 to >168>16ND
        Nitrofurantoin89≤32 to >64>64>64ND
    C. jeikeium76
        Penicillin760.5 to >8>8>80
        Ampicillin76≤0.12 to >8>8>8ND
        Oxacillin760.5 to >4>4>4ND
        Erythromycin76≤0.25 to >4>4>411.8
        Clindamycin76≤0.5 to >2>2>22.6
        Ciprofloxacin75≤1 to >2>2>235.5
        Levofloxacin75≤0.25 to >4>4>4ND
        Moxifloxacinb76≤0.25 to >44>435.5
        Tetracycline76≤2 to >16≤2≤292.1
        Vancomycin76≤0.25 to 20.501100
        Trimethoprim-sulfamethoxazole76≤0.5 to >4>4>418.4
        Tigecycline76≤0.03 to >0.50.120.25ND
        Rifampin76≤0.5 to >4≤0.5≤0.597.4
        Quinupristin-dalfopristin76≤0.5 to 4≤0.5289.5
        Linezolid76≤1≤1≤1100
        Gentamicin76≤2 to >16≤2>1681.6
        Daptomycin75≤0.5 to >4≤0.5189.5
        Chloramphenicol75≤2 to >16416ND
        Nitrofurantoin76≤32 to >64>64>64ND
    C. minutissimum76
        Penicillin76≤0.06 to >8183.9
        Ampicillin76≤0.12 to >814ND
        Oxacillin762 to >4>4>4ND
        Erythromycin76≤0.25 to >4>4>419.7
        Clindamycin76≤0.5 to >2>2>21.3
        Ciprofloxacin74≤1 to >2≤1>255.3
        Levofloxacin76≤0.25 to >4≤0.25>4ND
        Moxifloxacinb76≤0.25 to >4≤0.25>461.8
        Tetracycline76≤2 to >16≤2492.1
        Vancomycin76≤0.25 to 10.500.50100
        Trimethoprim-sulfamethoxazole76≤0.5 to >42>461.8
        Tigecycline76≤0.03 to >0.50.060.25ND
        Rifampin75≤0.5 to >4≤0.5≤0.596.1
        Quinupristin-dalfopristin76≤0.5 to 4≤0.5193.4
        Linezolid76≤1 to >8≤1≤198.7
        Gentamicin76≤2 to >16≤2≤296.1
        Daptomycin75≤0.5 to >4≤0.5192.1
        Chloramphenicol75≤2 to >1648ND
        Nitrofurantoin76≤32 to >6464>64ND
    C. coyleae58
        Penicillin58≤0.06 to >84>81.7
        Ampicillin58≤0.12 to >848ND
        Oxacillin582 to >4>4>4ND
        Erythromycin58≤0.25 to >4>4>43.5
        Clindamycin58≤0.5 to >2>2>23.5
        Ciprofloxacin57≤1 to >2>2>227.6
        Levofloxacin58≤0.25 to >4>4>4ND
        Moxifloxacinb58≤0.25 to >44>429.3
        Tetracycline58≤2 to >16≤2≤293.1
        Vancomycin58≤0.25 to 20.50.50100
        Trimethoprim-sulfamethoxazole58≤0.5 to >44>448.3
        Tigecycline58≤0.03 to >0.50.060.25ND
        Rifampin58≤0.5 to >4≤0.5≤0.591.4
        Quinupristin-dalfopristin58≤0.5 to 42443.1
        Linezolid58≤1 to 2≤1≤1100
        Gentamicin58≤2≤2≤2100
        Daptomycin57≤0.5 to >4≤0.5≤0.593
        Chloramphenicol58≤2 to >164>16ND
        Nitrofurantoin58≤32 to >64>64>64ND
    C. urealyticum52
        Penicillin520.12 to >8>8>83.8
        Ampicillin52≤0.12 to >8>8>8ND
        Oxacillin521 to >4>4>4ND
        Erythromycin52≤0.25 to >4>4>41.9
        Clindamycin51≤0.5 to >2>2>23.8
        Ciprofloxacin51≤1 to >2>2>23.8
        Levofloxacin52≤0.25 to >4>4>4ND
        Moxifloxacinb52≤0.25 to >4>4>43.8
        Tetracycline52≤2 to >16≤2≤292.3
        Vancomycin52≤0.25 to 20.501100
        Trimethoprim-sulfamethoxazole52≤0.5 to >4>4>41.9
        Tigecycline52≤0.03 to >0.50.060.12ND
        Rifampin52≤0.5 to >4≤0.5≤0.592.3
        Quinupristin-dalfopristin52≤0.5 to 1≤0.5≤0.5100
        Linezolid52≤1≤1≤1100
        Gentamicin52≤2 to >16≤2>1655.7
        Daptomycin51≤0.5≤0.5≤0.5100
        Chloramphenicol52≤2 to >168>16ND
        Nitrofurantoin52>64>64>64ND
    C. aurimucosum51
        Penicillin510.12 to >81>85.8
        Ampicillin510.25 to >818ND
        Oxacillin512 to >4>4>4ND
        Erythromycin51≤0.25 to >4>4>411.7
        Clindamycin511 to >2>2>20
        Ciprofloxacin51≤1 to >2>2>243.1
        Levofloxacin51≤0.25 to >44>4ND
        Moxifloxacinb51≤0.25 to >42>443.1
        Tetracycline51≤2 to >16≤2490.2
        Vancomycin51≤0.25 to 10.500.50100
        Trimethoprim-sulfamethoxazole51≤0.5 to >42>462.7
        Tigecycline51≤0.03 to 0.250.060.12ND
        Rifampin51≤0.5≤0.5≤0.5100
        Quinupristin-dalfopristin51≤0.5 to 4≤0.5192.2
        Linezolid51≤1≤1≤1100
        Gentamicin51≤2 to 4≤2≤2100
        Daptomycin51≤0.5 to 3≤0.5≤0.598
        Chloramphenicol51≤2 to >1648ND
        Nitrofurantoin51≤32 to >6464>64ND
    • ↵a % S, percentage of susceptible isolates; ND, not determined.

    • ↵b EUCAST breakpoints were applied for moxifloxacin (≤0.5 mg/liter, susceptible; >0.5 mg/liter, resistant).

Additional Files

  • Tables
  • Supplemental material

    • Supplemental file 1 -

      Tables S1 and S2

      PDF, 101K

    • Supplemental file 2 -

      Data Set S1

      XLSX, 19K

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In Vitro Antibiotic Susceptibility Pattern of Non-diphtheriae Corynebacterium Isolates in Ontario, Canada, from 2011 to 2016
Alefiya Neemuchwala, Deidre Soares, Vithusha Ravirajan, Alex Marchand-Austin, Julianne V. Kus, Samir N. Patel
Antimicrobial Agents and Chemotherapy Mar 2018, 62 (4) e01776-17; DOI: 10.1128/AAC.01776-17

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In Vitro Antibiotic Susceptibility Pattern of Non-diphtheriae Corynebacterium Isolates in Ontario, Canada, from 2011 to 2016
Alefiya Neemuchwala, Deidre Soares, Vithusha Ravirajan, Alex Marchand-Austin, Julianne V. Kus, Samir N. Patel
Antimicrobial Agents and Chemotherapy Mar 2018, 62 (4) e01776-17; DOI: 10.1128/AAC.01776-17
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KEYWORDS

Corynebacterium
antibiotic resistance
penicillin resistance
susceptibility testing

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