Testing faecal samples on a bowel screening card for the presence of occult (hidden) blood

- Image ID: J2W24M
Testing faecal samples on a bowel screening card for the presence of occult (hidden) blood
James King-Holmes / Alamy Stock Photo
Image ID: J2W24M
Technician tests a card from a bowel cancer sceening kit. Hydrogen peroxide is being applied to faecal stains, and any transient blue colour will indicate the prescence of occult (hidden) blood, suggesting a further investigations for bowel cancer or polyps.
Location: Guildford, United Kingdom