Print Topic - Archive

BTD Forums  /  Live Right 4 Your Type  /  How much blood is needed for the lewis test?
Posted by: Ekalia, Thursday, March 24, 2011, 6:03pm
Ok, so I decided to get a secretor/lewis test as a precursor to ordering Swami. The test kit arrived today so I plucked up my very limited courage and stabbed myself with the lancet... half an hour later I have a bruised finger, about 4 drops of blood and have almost fainted twice  :B ::) :-/

I tried to get more blood, but it just wasn't happening so am sending the sample off anyway in the hopes there will be enough for them to work with. Anyone know what the minimum amount of blood needed for a result is?

Thanks
Eka
Posted by: C_Sharp, Thursday, March 24, 2011, 6:23pm; Reply: 1
I do not know how much is needed.  But when I had Leis tested in the states they took a small vial. I do not remeber the precise size, but I think it would have been in the range of 3 to 5 ml.

Likely they do not need very much.

I know when I have tested for ABO blood types, I have missed and needed  to use a second lancet to get enough blood from a person.
Posted by: Ekalia, Thursday, March 24, 2011, 6:39pm; Reply: 2
Quoted Text
I think it would have been in the range of 3 to 5 ml.


Thanks C_Sharp  :) Hopefully there will be enough in that case. Will await the result with interest  ;D
Posted by: Patty H, Thursday, March 24, 2011, 8:02pm; Reply: 3
My daughter and I had blood drawn for the MNS phenotyping and the Lewis blood typing.   They drew two vials.  No big deal!

I had to send our blood to the American Red Cross, however, so make sure you research who can do the Lewis phenotyping before you go and have the blood drawn.
Posted by: maukik, Thursday, March 24, 2011, 8:18pm; Reply: 4
I like to put the hand/finger in some warm water then dry it off prior to lancing, .  This has a chance of getting more blood to the area.  

Sorry, I can't tell you how much is needed for the Lewis test.
Posted by: ABJoe, Thursday, March 24, 2011, 9:06pm; Reply: 5
This is a question to ask the lab doing the testing....
Posted by: Lola, Thursday, March 24, 2011, 9:11pm; Reply: 6
did you also get the type A subgroup kit and MN?
http://right4eu.sageshops.co.uk/gbp/product_info.php?cPath=20&products_id=96
This item is currently out of stock.
glad you got yours!
does the kit not have all the instructions?? :-/
http://right4eu.sageshops.co.uk/gbp/product_info.php?cPath=20&products_id=97
http://right4eu.sageshops.co.uk/gbp/product_info.php?cPath=20&products_id=98
Posted by: Ekalia, Thursday, March 24, 2011, 10:18pm; Reply: 7
Just the Lewis test, Lola, at this point in time - it seemed the mostlikely to affect the outcomes on Swami from what I've been reading on here.
The kit had all the instructions  :) but said 10-15 drops of blood into the vial, and mine dried up after about 4 - it was tough just to get that out  :-/. If the lab can't get a result I'll order another kit and see if the nurse at my GP surgery will draw the blood for me - I don't think it's normally the sort of thing they will do on the NHS but no harm in asking  :)
Posted by: GillianR, Friday, March 25, 2011, 7:46pm; Reply: 8
This is very interesting. I wish I had known about these tests when I was in England in 2009. I am now trying to get this done in Canada. I wish it were as easy as ordering a test. ::)
Posted by: Lola, Saturday, March 26, 2011, 6:22am; Reply: 9
ask Mike, he might help you find a lab for a serotyping panel
Posted by: C_Sharp, Saturday, March 26, 2011, 5:41pm; Reply: 10
Quoted from Ekalia
Just the Lewis test, Lola, at this point in time - it seemed the most likely to affect the outcomes on Swami from what I've been reading on here.
The kit had all the instructions  :) but said 10-15 drops of blood into the vial, and mine dried up after about 4 - it was tough just to get that out  :-/. If the lab can't get a result I'll order another kit and see if the nurse at my GP surgery will draw the blood for me - I don't think it's normally the sort of thing they will do on the NHS but no harm in asking  :)


I got my blood drawn for the Lewis test, by having an extra vial with me when a nurse was drawing a blood for some other tests. Before she started to draw the two vials for the blood tests that she was supposed to do, I handed her my extra vial and explained I needed a little blood for another test. I do not think I even told her what the other test was. Since she already had the needle in my arm it only took her another minute or something to draw the extra vial of blood.

Posted by: Lola, Sunday, March 27, 2011, 8:29am; Reply: 11
very clever C! :)
Posted by: Patty H, Sunday, March 27, 2011, 4:54pm; Reply: 12
I got my PCP to order mine.  I explained to her about secretor status and she ordered the Lewis phenotyping along with the MN phenotyping.  I had already done the saliva test kit but wanted a confirmation of those results.
Posted by: Ekalia, Wednesday, March 30, 2011, 4:56pm; Reply: 13
Results are in (so my 4 drops was obviously enough ;)) and the answer is...drumroll... Secretor  ;D

Not unexpected but nice to have it confirmed. I was going to wait until my one year anniversary of starting BTD to get Swami... but why wait? Swami here I come!
Posted by: Lola, Wednesday, March 30, 2011, 11:19pm; Reply: 14
:)
Posted by: Janette, Friday, August 16, 2013, 5:01pm; Reply: 15
I have just had this done here in the UK.It said 10-15 drops and the mark on the bottle was 5 ? the lady at work said it was about 0.5ml but she put a little more in there.It came back today saying I was Lewis a-ve and b-ve so a double negative.Typical as only about 5% of population test this way.I still dont have confirmation of secretor status :( Dr D said to treat those that test as LDN as a special type of NON-secretors ... what fun x
Posted by: Janette, Friday, August 16, 2013, 5:03pm; Reply: 16
I guess to know for sure I will have to have the saliva test done wish I had gone that way first I could of saved £28 that I spent on the blood test...hey ho !!
Posted by: C_Sharp, Friday, August 16, 2013, 5:35pm; Reply: 17
If you are going to do SWAMI it is helpful to be able to indicate Lewis double negative.

It is possible to do SWAMI leaving secretor status blank and using Lewis values instead.
Posted by: Hentag, Monday, August 19, 2013, 8:40am; Reply: 18
So I know my secretor status from taking the secretor saliva test.  Is the Lewis test also needed on the Swami?  What about the DNA history?  I was under the impression that they both were optional.
Posted by: C_Sharp, Monday, August 19, 2013, 12:24pm; Reply: 19
Quoted from Hentag
So I know my secretor status from taking the secretor saliva test.  Is the Lewis test also needed on the Swami?  What about the DNA history?  I was under the impression that they both were optional.


Both are optional.

I do not find that I get different from specifying specifying Lewis than when I just specify secretor status.  I have done much tesing of Lewis double negative, so that might affect some SWAMI results.


The DNA haplogroup data can shift people's diet plans.



Posted by: Hentag, Monday, August 19, 2013, 12:42pm; Reply: 20
Quoted from C_Sharp


Both are optional.

I do not find that I get different from specifying specifying Lewis than when I just specify secretor status.  I have done much tesing of Lewis double negative, so that might affect some SWAMI results.


The DNA haplogroup data can shift people's diet plans.



Thanks C_sharp, I have swami but have not completed it yet since I started noticing others including those for swami.





Print page generated: Saturday, July 26, 2014, 1:08am