A Simple Quantitative Test for Screening Cystinuria

A simple quantitative and qualitative microbiological screening test for bacteriuria.

A simple, accurate screening test for significant bacteriuria is described. It entails brief contact of a freshly voided specimen of urine with the surface of a solid culture medium lining the wall of a transparent disposable plastic container, incubating it at 37 degrees C for 24 hours, and counting colonies developing on a proscribed surface area. The method obviates errors due to contaminant...

A simple mucus test for cancer screening.

Comparative and correlative studies of the pathology and pathogenesis of colon cancer in animal models and human disease have resulted in conceptualization of 'field effect" theory and identification of markers that are expressed early during carcinogenesis. This assimilated body of knowledge has resulted in development of a simple rectal mucus test for colon cancer screening. The marker galact...

Quantitative fluorometric screening test for fecal porphyrins.

We describe a fluorometric method for screening and quantifying porphyrins in stool. A small sample of stool is extracted with concentrated HCI and is diluted 200-fold in 3 mol/L HCI before analysis. An excitation scan is done from 350 to 450 nm, monitoring emission at 603 nm. Total porphyrin is estimated at the isosbestic point for coproporphyrin and protoporphyrin (402.5 nm). Monitoring emiss...

Carbohydrate Tumor Marker - Basis for a Simple Cancer Screening Test

The sialic acid-free di.sacchari.de D-ga.lactose-ji-[l-^3]-Nacctyl-D-galaclosamine (Gal-GalNAc) is expressed in mucous secretions of various cpi.lhel.ial cancers including tliose of the colon, breast, lung, prostate, pancreas, etc. The expression of Gal-GalNAc in "normal" lissues and. their secrelions away from, but wilhi.ii thc general field of cancers indicate. thc operation of a field-effecl...

Quantitative Dengue Test: Is it Practical for Clinical Practice?