could I have a false negative blood test?

by roslina

Thank you for your informative website.

I had an h pylori infection for the last 5 months, I was only diagnosed last July through a biopsy. I chose to treat my infection through diet along with natural remedies. I felt much better but still have some symptoms as I had a gastritis too.

Recently, I decided to go check with a blood test since I was not treated with antibiotics and the results came back 'negative.'

Should I take these result for granted or should I double-check with another test? as I read on the net that sometimes if the immune system is weak there might not be enough antibodies to show on a blood test.