What it measures
A swab is checked for Gram-negative bacteria, such as E. coli and Klebsiella, that resist several classes of antibiotics. Carrying them on the skin or in the gut often causes no symptoms. The MRGN label is used mainly by hospitals in Germany and other German-speaking countries.
Why people test it
- Asked for by some hospitals and care providers before admission or transfer, often after a hospital stay abroad.
- Checked in people who have been in close contact with someone carrying these bacteria.
Typical range
Reported as detected or not detected, and a positive report names the bacteria and the antibiotics they resist. Methods vary between labs, and your report shows how the lab reads the result.
Finger-prick or vein?
A swab, not blood, usually from the groin or rectum. Offered as a kit only, with the swab taken and posted to the lab.