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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / King-Holmes, James |
Bildgröße: | 3426 px × 5140 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |