Table 1

Microorganisms isolated as a function of the number of PMNLs/HPF in Gram stain

MicroorganismTotal, N=491, n (%)G0 (≤2), N=364, n (%)G1 (3–4), N=57, n (%)G2 (≥5), N=70, n (%)
Samples positive for any microorganism148 (30%)92 (25%)18 (32%)38 (54%)
≥2 microorganisms/sample11 (2%)6 (2%)2 (3%)3 (4%)
Detection of individual organisms
Ureaplasma urealyticum55 (11%)46 (13%)3 (5%)6 (9%)
Chlamydia trachomatis34 (7%)20 (5.5%)6 (10%)8 (11%)
Neisseria gonorrhoeae30 (6%)3 (1%)3 (5%)24 (34%)
*Haemophilus parainfluenzae13 (3%)10 (3%)3 (5%)
*Haemophilus influenzae7 (1%)7 (2%)
*Candida sp.3 (1%)2 (0.5%)1 (2%)
*Shaphylococcus aureus3 (1%)1 (0.3%)2 (3%)
*Streptococcus agalactiae6 (1%)5 (1%)1 (1%)
*Escherichia coli6 (1%)4 (1%)1 (2%)1 (1%)
*Mycoplasma hominis2 (0.5%)1 (0.3%)1 (2%)
Detection of coinfection with two or more organisms
Ureaplasma urealyticum + Chlamydia trachomatis4 (0.8%)2 (0.5%)1 (2%)1 (1%)
Ureaplasma urealyticum + Chlamydia trachomatis + *Haemophilus parainfluenzae1 (0.2%)1 (0.3%)
Chlamydia trachomatis + Neisseria gonorrhoeae1 (0.2%)1 (1%)
Ureaplasma urealyticum + *Streptococcus agalactiae2 (0.5%)1 (0.3%)1 (1%)
Ureaplasma urealyticum + *Haemophilus influenzae1 (0.2%)1 (0.3%)
Ureaplasma urealyticum + *M Mycoplasma hominis1 (0.2%)1 (0.3%)
Ureaplasma urealyticum + *Shaphylococcus aureus1 (0.2%)1 (2%)
  • * Microorganisms considered to be an uncommon cause of urethritis.

  • PMNLs/HPF, polymorphonuclear leucocytes per high-power field.