Identifies spirochetes and other bacteria such as H. pylori and two causative agents of cat scratch disease. Warthin-Starry relies on the ability of certain bacteria to bind silver ions from solution. Subsequent addition of a reducing agent then converts this bound silver to visible metallic silver.
- 1.5ml - 2% silver nitrate
- 3.75ml - 5% gelatin
- 2ml - 0.15% hydroqinone
- Background-yellow to light bown