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[Isolation of a wild-type virulent phage of Helicobacter pylori and its simulated treatments of gastrointestinal Hp in vitro].

OBJECTIVE
To isolate the wild-type virulent phage of Helicobacter pylori (Hp) and simulate the treatments in vitro to investigate the methods for oral Hp-assisted penetration of the phage through the gastric barrier and offspring phage release for infection and treatment of gastrointestinal Hp.


METHODS
The Hp strain was cultured with the candle cylinder method and the virulent phage was isolated by single plate or double plate experiment. A simulated gastric juice was applied and the bactericidal effect of the phage was tested with double flats experiment.


RESULTS
After a 1.5-h treatment in simulated gastric juice, the orally derived Hp-borne phage was still capable of forming plaques while the control phage was not.


CONCLUSION
The oral Hp can help the phage resist the gastric juice and then infect the gastrointestinal Hp.