Yes ,. H. PYLORI might return at a later time..
It is certainly possible to have an infection down the road after successful treatment
If your treatment was recent then active H. PYLORI infection would be unlikely ..
It often takes time for associated ulcers to HEAL completely
If you were treated in the past ( say for sale of example 3 years ago -- doing fine --- now return of ulcer symptoms then such could very well be re-infection of H. PYLORI related )
If you had such scenario as above then the breath test for H.PYLORI would detect it ..endoscopy could also detect it...
A blood test for antibodies may not tell present from past infection though
I hope that this information is helpful for you
Let me know if you have further questions or concerns
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Thank you and Best Regards,
Anthony Bray MD