Bowel cancer positive test
A card from a test kit stained by faecal specimens which have been exposed to a guaiac impregnated surface. The card has been challenged with hydrogen peroxide in the laboratory and one sample has reacted positively (blue colour) indicating the need for further tests.
©James King-Holmes 2011 ©James King-Holmes |PLUS|01-AA-662| 2011
Photo size: 17.6 Mpixels (50.4 MB uncompressed) - 3426x5140 pixels (11.4x17.1 in / 29.0x43.5 cm at 300 ppi)