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→Using Fluorescein to Identify Urine Marking or Soiling Cats
===Using Fluorescein to Identify Urine Marking or Soiling Cats===
===Using Fluorescein to Identify Urine Marking or Soiling Cats===
It is possible to use fluorescein dye to identify the urine of each cat in the household so that the identity of the soiling cat can be confirmed. Recent research has shown that the fluorescence of urine spots from fluorescein treated cats may vary with urine pH. The fluorescence of fluorescein varies with pH, such that it only strongly emits light under UV illumination when it is in a neutral or alkaline solution. In acidic solution it may hardly glow green at all. Spots should therefore be sprayed with a buffer solution of sodium bicarbonate [baking soda], which will produce a pH of around 8, before testing with a UV lamp.
It is possible to use fluorescein dye to identify the urine of each cat in the household so that the identity of the soiling cat can be confirmed. Recent research has shown that the fluorescence of urine spots from fluorescein treated cats may vary with urine pH. The fluorescence of fluorescein varies with pH, such that it only strongly emits light under UV illumination when it is in a neutral or alkaline solution. In acidic solution it may hardly glow green at all. Spots should therefore be sprayed with a buffer solution of sodium bicarbonate (baking soda), which will produce a pH of around 8, before testing with a UV lamp.
* Fluorescein is available as sterile paper strips, for ophthalmic examination. These contain approximately 1 mg of fluorescein per tip, but this should be checked with the manufacturer.
* Fluorescein is available as sterile paper strips, for ophthalmic examination. These contain approximately 1 mg of fluorescein per tip, but this should be checked with the manufacturer.
* The tips should be torn off and rolled to fit into gelatine capsules, giving approximately 5 per capsule [5mg].
* The tips should be torn off and rolled to fit into gelatine capsules, giving approximately 5 per capsule (5mg).
* This dose is given once daily for 3-4 days.
* This dose is given once daily for 3-4 days.
* Urine sites are checked daily.
* Urine sites are checked daily.