[behucrolig]

"It is now widely accepted that pyuria (≥1 WBC μl−1) detected by microscopy of a fresh unspun, unstained specimen of urine is the best biological indicator of UTI available." - see Khasriya, R., Barcella, W., De Iorio, M. et al. Int Urogynecol J (2018) 29: 1019. https://doi.org/10.1007/s00192-017-3472-7

[behucrolig]

And BTW, if you could develop an at home microscopy based test, that could TRULY revolutionise UTI testing. Inspired? ;-)