Diagnosis of
Helicobacter pylori (H. pylori) infection is based on the culture and isolation of this bacteria, we have developed a new endoscopic technique of targetting biopsy for isolation of
H. pylori by cochineal extract spray.
The cochineal extract is a non-toxic food-dye, its use to the human and safety having been approved in a law. In the conditions at pH>4, it indicates the distinctive color change from red to purple.
H. pylori has an enzyme, urease which converts urea into ammonia. This ammonia elevates the local pH levels on the surface of gastric mucosa. Therefore, the presence of
H. pylori would be expected when the color of cochineal extract sprayed on the gastric mucosa turned to purple within a few seconds. In fact, we isolated
H. pylori at a high rate (90%) from the gastric mucosa where cochineal extract showed this color change.
We conclude that this technique would be very useful in the definit diagnosis of
H. pylori infection.
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