Skip to main content

Please note that this is a beta version of our website. Should you encounter any bugs, glitches, lack of functionality or other problems on the website, please let us know immediately so we can rectify these accordingly. Your help in this regard is greatly appreciated! You can email us.

Login to North West London Pathology – consumables service

If you need a new account or you have a query about your order, please telephone the pathology call centre on 0203 313 5353.

If you have forgotten your password you can reset this yourself. Please click here if you have forgotten your password.

Results Line and Enquiries

0203 313 5353

Reducing substances (faecal)

Category Biochemistry >> Metabolic
Test background

Faecal reducing sugars in infants reflect a process of 'intestinal hurry' or diarrhoea secondary to other causes that prevent complete absorption in the intestines. The main substances likely to be detected in the faeces of infants include: glucose, fructose (fructosuria/intolerance), galactose (galactosaemia) and lactose (lactose intolerance). The reducing sugars assay typically aids initial diagnosis of an inborn error of metabolism. A positive screen for reducing substances in the faeces should be followed by sugar chromatography to identify specific carbohydrates present and provide a quantitative estimation.

Clinicial Indications

Neonatal/infantile presentation of generalised failure to thrive, chronic diarrhoea, hepatic dysfunction and developmental delay (often global).

Reference range

See report

Sample & container required Faeces in universal container. Store frozen after receipt in lab.
Sample volume 5 g
Transport storage Transport samples to laboratory immediately. Samples from outside NWLP should be sent frozen.
Turnaround time 1 week
Notes

A positive screen for faecal reducing substances should be followed by sugar chromatography to identify specific carbohydrates present and provide a qualitative estimation.