Toledo, Hector , Punzon, Sara G. , MARTÍN GUTIÉRREZ, GUILLERMO, Perez, Juan A. , Lepe, Jose A.
No
Braz J Microbiol
Article
Científica
2.1
0.507
01/09/2023
001022651700002
We have evaluated the Sysmex UF-5000 cytometer use in microbiology for the screening of negative urines, looking for cut-off points to detect bacteria and leukocytes. The number of processed urines was 3569, the highest to date in these studies. The best general cut-off point has been 100 bact/& mu;l, giving an area under the ROC curve of 0.868, a sensitivity of 96%, a specificity of 50%, 1.17% of false negatives, and saving 40% of cultures. The PPV and NPV have been 35.5 and 95.4 respectively. The leukocyte count has not been useful. Finally, we have evaluated urine screening usefulness, concluding that in laboratories such as ours (284 urines/working day) or smaller, it is not cost-effective.
UTI; Urinalysis; Cytometer; Bacterial count