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How many years do the antibodies stay in the blood?

Blood tests (for antibody) are used to screen for H.pylori. They remain positive for many months after treatment so can only be used as the initial test. Urine antibody is a "pregnanacy style" urine test. Accuracy is slightly less than blood tests. A negative blood test is good evidence that Hp is NOT present. Use it to exclude the diagnosis (but no test is 100% perfect remember).

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Health Inquirer
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How many years do the antibodies stay in the blood?

Post by Health Inquirer » Wed Sep 09, 2015 6:18 am

Hello,

How many years do the antibodies stay in the blood? 10, 15, 20 years?

I deeply appreciate all your efforts into assisting people with their questions.
Thank you very much and best to you.

Helico_expert
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Re: How many years do the antibodies stay in the blood?

Post by Helico_expert » Thu Sep 10, 2015 1:01 am

well it depends. If you meant the urease antibody, i think it last a few weeks to a few months. If you meant the cagA antibody, it can generally last longer than 6 months or a year. It's depending on individual's immune system. Some papers even reported antibody detected after 2 years.

refrence
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1797704/

Health Inquirer
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Re: How many years do the antibodies stay in the blood?

Post by Health Inquirer » Sat Sep 12, 2015 6:39 pm

Dear Helico Expert,

As always, thank you very much for your generous gift of time, thoroughness, and kindness in your replies. I apologize for the delayed reply, work has been very hectic.

I am not a scientist, so I guess I was not 100% sure what antibody I was referring to. I am mainly referring to the blood test they do to find out if you have an H pylori infection. I have heard that the blood test is only good if you have never been treated for H pylori in the past because antibodies can stay in the blood for 10 years or longer. I was wanting to find out if that is true, the 10 years comment. And if they stay in the blood longer than 10 years, how long are they in the blood for? 20 years? 30 years? After what you sent it seems like 10 years might not be the truth. Your study talks about 2 years. 2 years is much different than 10 years. So, I am just trying to find out for sure. :D Any thoughts?

My deepest gratitude to you, always, for your efforts.

Helico_expert
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Re: How many years do the antibodies stay in the blood?

Post by Helico_expert » Sun Sep 13, 2015 8:52 am

no worries. i think 2 - 3 years is about average. Anyway, you have taken treatment, you can always do breath or stool test to find out if you are still infected.

Health Inquirer
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Re: How many years do the antibodies stay in the blood?

Post by Health Inquirer » Mon Sep 14, 2015 5:13 pm

Great to know. :D

As always, thank you very much for your time and efforts, Helico Expert.

I hope you have a wonderful week. Best to you.

Jesusvelis95
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Re: How many years do the antibodies stay in the blood?

Post by Jesusvelis95 » Mon Sep 21, 2015 10:24 pm

Wow I didn't know antibodies stayed in the blood for so long... does anyone know of any other sources that could teach me about this subject?? I've been spending all my time​ on this website
lately, so I haven't had any time to research the topic.

Helico_expert
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Re: How many years do the antibodies stay in the blood?

Post by Helico_expert » Tue Sep 22, 2015 1:14 am

antibodies is a very big topic. you better ask more specific question.

Health Inquirer
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Re: How many years do the antibodies stay in the blood?

Post by Health Inquirer » Wed Sep 23, 2015 7:13 am

I don't know how to help; however, I suggest following up with Helico Expert who is an excellent resource and guide! :D Best wishes.

michaeljonson
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Re: How many years do the antibodies stay in the blood?

Post by michaeljonson » Wed Dec 09, 2015 9:53 am

It depends on the immune system of each individual.

Health Inquirer
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Re: How many years do the antibodies stay in the blood?

Post by Health Inquirer » Wed Mar 02, 2016 5:11 am

Thank you for your reply, michaeljonson. I only just now saw it.

Thank you again and best to you.

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