{
  "resourceType": "Observation",
  "id": "herd1",
  "status": "final",
  "category": [
    {
      "coding": [
        {
          "system": "http://terminology.hl7.org/CodeSystem/observation-category",
          "code": "laboratory",
          "display": "Laboratory"
        }
      ],
      "text": "Laboratory"
    }
  ],
  "code": {
    "coding": [
      {
        "system": "http://loinc.org",
        "code": "80219-9",
        "display": "Mycoplasma hyopneumoniae Ab sample/Positive control in Serum by Immunoassay"
      },
      {
        "system": "http://acme.org/devices/clinical-codes",
        "code": "Mycoplasma",
        "display": "Mycoplasma"
      }
    ],
    "text": "Mycoplasma hyopneumoniae - MHP"
  },
  "subject": {
    "reference": "Group/herd1"
  },
  "encounter": {
    "display": "part of a health assurance program"
  },
  "effectiveDateTime": "2017-11-20",
  "valueQuantity": {
    "value": 0.2,
    "unit": "% (sample/positive control)",
    "system": "http://unitsofmeasure.org",
    "code": "%"
  },
  "interpretation": [
    {
      "coding": [
        {
          "system": "http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation",
          "code": "NEG",
          "display": "Negative"
        }
      ],
      "text": "Negative"
    }
  ],
  "specimen": {
    "reference": "Specimen/pooled-serum",
    "display": "30 serum"
  },
  "referenceRange": [
    {
      "text": ">0.4 Positive; 0.3 to 0.4 Suspect < 0.3 Negative"
    }
  ],
  "meta": {
    "tag": [
      {
        "system": "http://terminology.hl7.org/CodeSystem/v3-ActReason",
        "code": "HTEST",
        "display": "test health data"
      }
    ]
  }
}