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. 2021 Feb 26;13(2):e13562. doi: 10.7759/cureus.13562

Table 5. Frequency of susceptibility of micro-organisms to antibiotics isolated in the cultures (n=222).

*Most sensitive/resistant antibiotic among the particular organism; ^second most sensitive/resistant antibiotic among the particular organism

Staph aureus: Staphylococcal aureus; MRSA: methicillin-resistant Staphylococcal aureus; P. aeruginosa: Pseudomonas aeruginosa; E. coli: Escherichia coli; K. pneumonia: Klebsiella pneumonia; K. oxytoca: Klebsiella oxytoca

Antibiotics Organisms
1. Staph aureus 2. MRSA 3. Enterococcus 4. Streptococcus 5. P. aeruginosa 6. E. coli 7. K. pneumonia 8. Proteus mirabilis 9. Acinetobacter 10. K.oxytoca 11. Burkholderia cepacia 12. Enterobacter 13. Citrobacter
Aztreonam Sensitive 0 0 0 0 0 0 0 0 0 0 0 0 0
Resistant 0 0 0 0 1 1 2 0 0 0 0 0 0
Amikacin Sensitive 4* 2^ 2 0 6^ 109* 15^ 1^ 0 2* 0 3 1*
Resistant 0 1^ 1 0 3^ 8 10 0 1^ 2^ 0 5^ 0
Amoxicillin/clavulanic acid Sensitive 1 0 21^ 5* 0 57 8 2* 0 2* 0 0 0
Resistant 0 3* 1 0 0 58 16 0 0 2^ 0 0 0
Ampicillin Sensitive 0 0 20 5* 0 4 1 2* 0 0 0 0 0
Resistant 0 0 20^ 0 0 111* 2 0 0 1 0 0 0
Ciprofloxacin Sensitive 3^ 0 1 0 7* 33 4 1^ 0 1^ 0 2 0
Resistant 1* 1^ 5 0 3^ 87 19 0 2* 3* 0 7* 0
Ceftriaxone Sensitive 0 0 1 3 0 20 5 1^ 1^ 1^ 0 2 0
Resistant 0 0 3 0 0 99 21* 0 1^ 2^ 0 7* 1*
Cefixime Sensitive 0 0 2 0 0 22 5 1^ 0 1^ 0 2 0
Resistant 0 0 1 0 0 107^ 21* 0 0 3* 0 7* 1*
Cefuroxime Sensitive 0 0 1 0 0 22 6 1^ 0 1^ 0 2 0
Resistant 0 0 2 0 0 106 20^ 0 0 3* 0 7* 1*
Co-trimoxazole Sensitive 0 0 2 1 0 36 3 1^ 0 1^ 1* 2 0
Resistant 1* 0 1 1 0 57 14 0 2* 2^ 0 1 1*
Gentamicin Sensitive 4* 1 3 0 4 86 11 0 0 1^ 0 4^ 0
Resistant 0 1^ 1 0 3^ 33 14 0 1^ 3* 0 5^ 1*
Meropenem Sensitive 0 0 1 0 4 85 11 0 2* 0 1* 3 1*
Resistant 0 0 0 0 2 7 7 0 0 2^ 0 4 0
Piperacillin/tazobactam Sensitive 0 0 3 0 7* 81 12 1^ 2* 1 0 2 1*
Resistant 0 0 0 0 3^ 34 13 0 0 2^ 0 5^ 0
Vancomycin Sensitive 3^ 3* 18 1 0 0 0 0 0 0 0 0 0
Resistant 0 0 12 0 0 0 1 0 0 0 0 0 0
Fosfomycin Sensitive 0 0 32* 4^ 1 104^ 19* 2* 1^ 1^ 0 4^ 1*
Resistant 0 0 7 1 0 16 5 0 0 1 0 4 0
Nitrofurantoin Sensitive 3^ 1 13 1 0 51 8 0 0 1^ 0 0 1*
Resistant 0 0 5 0 0 2 1 0 0 1 0 1 0
Levofloxacin Sensitive 0 0 7 3 0 4 1 1^ 0 0 0 0 1*
Resistant 0 0 26* 2* 1 8 5 0 0 1 1* 3 0
Colomycin/polymyxin B Sensitive 0 0 0 0 2 6 8 0 0 2* 0 5* 0
Resistant 0 0 0 0 0 0 0 0 0 0 0 0 0
Tobramycin Sensitive 0 0 0 0 0 0 0 0 0 0 0 0 0
Resistant 0 0 0 0 1 6 7 0 0 2^ 0 4 0
Sulbactam/cefoperazone Sensitive 0 0 0 0 0 0 0 0 0 0 0 0 0
Resistant 0 0 0 0 1 6 8 0 0 2^ 0 4 0
Ceftazidime Sensitive 0 0 0 0 6^ 0 0 0 0 0 1* 0 0
Resistant 0 0 0 0 4* 0 0 0 0 0 0 0 0
Linezolid Sensitive 0 0 15 0 0 0 0 0 0 0 0 0 0
Resistant 0 0 0 0 0 0 0 0 0 0 0 0 0
Cloxacillin Sensitive 4* 0 0 0 0 0 0 0 0 0 0 0 0
Resistant 0 3* 0 0 0 0 0 0 0 0 0 0 0
Organisms Minimal inhibitory concentration
1. Methicillin-sensitive Staphylococcal aureus (n=4) Ampicillin: susceptibility ≥29 mm, resistant ≤28 mm; amoxicillin + clavulanic acid: susceptibility ≥22 mm, resistant ≤21 mm; cefuroxime: susceptibility ≥24 mm, resistant ≤20 mm; ciprofloxacin: susceptibility ≥21 mm, resistant ≤15 mm; co-trimoxazole: susceptibility ≥16 mm, resistant ≤10 mm; gentamicin: susceptibility ≥15 mm, resistant ≤12 mm
2. MRSA (n=2)
3. Enterococcus species (n=24) Ampicillin: susceptibility ≥17 mm, resistant ≤16 mm; amoxicillin + clavulanic acid: susceptibility ≥17 mm, resistant ≤16 mm; ciprofloxacin: susceptibility ≥21 mm, resistant ≤15 mm
4. Streptococcus species (n=4) Ampicillin: susceptibility ≥24 mm, resistant ≤19 mm; ciprofloxacin: susceptibility ≥17 mm, resistant ≤13 mm
5. Pseudomonas aeruginosa (n=8) Amikacin: susceptibility ≥17 mm, resistant ≤14 mm; aztreonam: susceptibility ≥22 mm, resistant ≤15 mm; ciprofloxacin: susceptibility ≥21 mm, resistant ≤15 mm; meropenem: susceptibility ≥19 mm, resistant ≤15 mm; gentamicin: susceptibility ≥15 mm, resistant ≤12 mm; piperacillin/tazobactam: susceptibility ≥21 mm, resistant ≤14 mm
6. E. coli (n=82) Amikacin: susceptibility ≥17 mm, resistant ≤14 mm; aztreonam: susceptibility ≥21 mm, resistant ≤17 mm; ciprofloxacin: susceptibility ≥21 mm, resistant ≤15 mm; meropenem: susceptibility ≥23 mm, resistant ≤19 mm; gentamicin: susceptibility ≥15 mm, resistant ≤12 mm; piperacillin-tazobactam: susceptibility ≥21 mm, resistant ≤17 mm
7. Klebsiella pneumonia (n=20) Amikacin: susceptibility ≥17 mm, resistant ≤14 mm; aztreonam: susceptibility ≥21 mm, resistant ≤17 mm; ciprofloxacin: susceptibility ≥21 mm, resistant ≤15 mm; meropenem: susceptibility ≥23 mm, resistant ≤19 mm; gentamicin: susceptibility ≥15 mm, resistant ≤12 mm; piperacillin-tazobactam: susceptibility ≥21 mm, resistant ≤17 mm
8. Proteus mirabilis (n=1) Amikacin: susceptibility ≥17 mm, resistant ≤14 mm; aztreonam: susceptibility ≥21 mm, resistant ≤17 mm; cefuroxime: susceptibility ≥18 mm, resistant ≤14 mm; ciprofloxacin: susceptibility ≥21 mm, resistant ≤15 mm; meropenem: susceptibility ≥23 mm, resistant ≤19 mm; gentamicin: susceptibility ≥15 mm, resistant ≤12 mm
9. Acinetobacter species (n=1) Amikacin: susceptibility ≥17 mm, resistant ≤14 mm; aztreonam: susceptibility ≥21 mm, resistant ≤17 mm; ciprofloxacin: susceptibility ≥21 mm, resistant ≤15 mm; meropenem: susceptibility ≥18 mm, resistant ≤14 mm; gentamicin: susceptibility ≥15 mm, resistant ≤12 mm; piperacillin-tazobactam: susceptibility ≥21 mm, resistant ≤17 mm
10. Klebsiella oxytoca (n=4) Not checked
11. Burkholderia cepacia (n=1)
12. Enterobacter species (n=9)
13. Citrobacter species (n=1)