Pyuria is presence of WBC [or pus] in urine.

• Pyuria is 6+ neutrophils per high power field of unspun, voided MSU. It can indicate:
  • Bacterial UTI
  • Sepsis
  • Older Pt's with pneumonia
• Sterile pyuria is pyuria that appears "sterile" by standard culturing techniques. It is caused by:
  • STI's (e.g. gonorrhea) and viruses which won't grow in bacterial cultures
  • Side effect of medications, e.g. paracetamol
  • Kawasaki's disease
  • Genitourinary TB

• Hematuria (RBC)
• Urinalysis (category)