LOINC 7660-4 Rat muliialgro IgE Ab [Units/volume] in Serum

I was reviewing some of the allergy-related IgE codes and ran across LOINC code 7660-4. I’ve been unable to find what ‘rat muliialgro’ represents. Does anyone happen to know what this represents?

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Hi Jeremy, From the LOINC code it looks like it is a very old concept. Searching in LOINC and references I honestly didn’t come across any relevant resource. I will check a little more and circle back. Thank you for your note.
Eza

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