I've had a request for codes for four types of organisms: Livestock- and non-livestock-associated MRSA and MSSA. Now in the Netherlands we generally report MRSA as a species (Staphyloccus aureus) with SNOMED, with LOINC codes that denote its resistance/susceptability to various antibiotics.
But how to handle the livestock-associated bit? Appararently it is a feature of the organism - something that they determine based on the culture results, not the origin of the specimen. I can't find anything in LOINC. Should/can livestock-associated be a subtype of 3092008 | Staphylococcus aureus (organism) |, or is it more in the nature of a finding?