Anti-Ata

Blood Group: August (At)

Common:  ata is a high incidence antigen.

Causes HDN: Yes

Critical Titer: 1:16

Information:

For a long time, it has been thought that anti-Ata did not cause HDN. 3 of the anti-ata cases were unnamed, but identical. When the August blood group was formed they were named and identified as anti-Ata. [4] 

Anti-Ata can cause moderate HDN requiring phototherapy [1]. Anti-Ata can also cause hemolytic transfusion reactions [2, 3]. An experiment showed the survival for transfused mismatched cells is 95% at 1 hour, and 18% at 24 hours. [3]

Articles:

1 - http://onlinelibrary.wiley.com/doi/10.1046/j.1537-2995.1987.27688071696.x/abstract

2 - http://onlinelibrary.wiley.com/doi/10.1111/j.1423-0410.1995.tb01684.x/full

3 - http://onlinelibrary.wiley.com/doi/10.1046/j.1537-2995.1995.35195090666.x/full

4 - http://onlinelibrary.wiley.com/doi/10.1111/j.1537-2995.1973.tb05479.x/full