A case report on weak subgroup of A

Dr. Saurabh Lahare, Dr. Sankalp Sharma


A end is a weak subgroup of Blood group A, found rarely in general population, not detected by routine forward and reverse blood grouping, detected by Adsorption/Elution technique along with saliva testing for A, B and H antigens. Although it is subgroup of A but it lacks A antigen in saliva and contains only H antigen.


- A end, subgroup, A blood group, saliva testing

Full Text:



- Beattie KM. Identifying the cause of weak or missing antigens in ABO grouping tests. In: The investigation of typing and compatibility problems caused by red blood cells. Washington, DC: AABB, 1975:15-37.

- AABB 18th edition, method 2-8

- Beattie, KM: Perspectives on some usual and unusual ABO phenotypes. In Bell,CA (ed): A Seminar on Antigens on Blood Cells and Body Fluids. American Association of Blood Banks, Washington, DC, 97149, 1980,

Lopez, M, et al: Activity of IgG and IgM ABO antibodies against some weak A (A3, Ax, Aend) and weak B (B3, Bx) red cells. Vox Sang 37:281285, 1979,

Watkins, WM: The ABO blood group system: Historical background. TransfusMed 11:243265, 2001.

- Modern Blood Banking and Transfusion Practices by Denise M Harmening 5th edition, Table 6-14.

- Modern Blood Banking and Transfusion Practices by Denise M Harmening 5th edition page 117.

DOI: https://doi.org/10.7439/ijbar.v8i10.4218

Copyright (c) 2017 International Journal of Biomedical and Advance Research

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.