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*Blood Group Testing

Greenfields Laboratory Services tests for the following blood groups:
  • ABO with subgroups of A
  • Rh (D)
  • Lewis
  • MN
  • Duffy
All these blood groups are tested during an assessment for GenoTyping using the SWAMI software.

The Lewis blood group system is genetically linked with secretor status: individuals are usually Lewis a+ or Lewis b+ (Lea+ or Leb+). Lea+ is linked to being a non-secretor, Leb+ is linked to being a secretor of your ABO blood group. Lewis negative (Lea- Leb-) is an unusual blood group, people with this blood group won't be able to find out whether they are secretor or non-secretor, although it gives important additional information about genetic risk factors.

To do: link to lab shop
Image courtesy of Stuart Miles at

Blood groups