An example of a herd screening ELISA assay for Mycoplasmal Pneumonia in Pigs.

{
  "resourceType": "Observation",
  "id": "herd1",
  "text": {
    "status": "generated",
    "div": "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p><b>Generated Narrative with Details</b></p><p><b>id</b>: herd1</p><p><b>status</b>: final</p><p><b>category</b>: Laboratory <span>(Details : {http://terminology.hl7.org/CodeSystem/observation-category code 'laboratory' = 'Laboratory', given as 'Laboratory'})</span></p><p><b>code</b>: Mycoplasma hyopneumoniae - MHP <span>(Details : {LOINC code '80219-9' = 'Mycoplasma hyopneumoniae Ab sample/Positive control in Serum by Immunoassay', given as 'Mycoplasma hyopneumoniae Ab sample/Positive control in Serum by Immunoassay'}; {http://acme.org/devices/clinical-codes code 'Mycoplasma' = 'Mycoplasma', given as 'Mycoplasma'})</span></p><p><b>subject</b>: <a>Group/herd1</a></p><p><b>encounter</b>: part of a health assurance program</p><p><b>effective</b>: 20/11/2017</p><p><b>value</b>: 0.2 % (sample/positive control)<span> (Details: UCUM code % = '%')</span></p><p><b>interpretation</b>: Negative <span>(Details : {http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation code 'NEG' = 'Negative', given as 'Negative'})</span></p><p><b>specimen</b>: <a>30 serum</a></p><h3>ReferenceRanges</h3><table><tr><td>-</td><td><b>Text</b></td></tr><tr><td>*</td><td>&gt;0.4 Positive; 0.3 to 0.4 Suspect &lt; 0.3 Negative</td></tr></table></div>"
  },
  "status": "final",
  "category": [

  "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"
    },

    {
      "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"

      "system" : "http://acme.org/devices/clinical-codes",
      "code" : "Mycoplasma",
      "display" : "Mycoplasma"
    }],
    "text" : "Mycoplasma hyopneumoniae - MHP"

  },
  "subject": {
    "reference": "Group/herd1"

  "subject" : {
    "reference" : "Group/herd1"

  },
  "encounter": {
    "display": "part of a health assurance program"

  "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": "%"

  "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"

  "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"
    }
  ]

  "referenceRange" : [{
    "text" : ">0.4 Positive; 0.3 to 0.4 Suspect < 0.3 Negative"
  }]

}