An example of a herd screening ELISA assay for Mycoplasmal Pneumonia in Pigs. (id = "herd1")

<?xml version="1.0" encoding="UTF-8"?>

<Observation xmlns="http://hl7.org/fhir">
  <id value="herd1"/> 
      <!--     the mandatory status     -->
  <text> <status value="generated"/> <div xmlns="http://www.w3.org/1999/xhtml"><p> <b> Generated Narrative: Observation</b> <a name="herd1"> </a> <a name="hcherd1"> </a> </p> <div style="display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border:
       1px solid #8da1b4; border-radius: 5px; line-height: 60%"><p style="margin-bottom: 0px">Resource Observation &quot;herd1&quot; </p> </div> <p> <b> status</b> : <span title="   the mandatory status   ">final</span> </p> <p> <b> category</b> : <span title="  category code is A code that classifies the general type of observation being
         made. This is used for searching, sorting and display purposes. ">Laboratory <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> (<a href="http://terminology.hl7.org/5.5.0/CodeSystem-observation-category.html">Observation Category Codes</a> #laboratory)</span> </span> </p> <p> <b> code</b> : <span title="  
    Observations are often coded in multiple code systems.
      - LOINC provides codes of varying granularity (though not usefully more specific
         in this particular case) and more generic LOINCs  can be mapped to more specific
         codes as shown here
      - snomed provides a clinically relevant code that is usually less granular
         than LOINC
      - the source system provides its own code, which may be less or more granular
         than LOINC
    ">Mycoplasma hyopneumoniae - MHP <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> (<a href="https://loinc.org/">LOINC</a> #80219-9 &quot;Mycoplasma hyopneumoniae Ab sample/Positive control in Serum by
             Immunoassay&quot;; clinical-codes#Mycoplasma &quot;Mycoplasma&quot;)</span> </span> </p> <p> <b> subject</b> : <span title="    subject is a herd of 2500 breding sows  "><a href="group-example-herd1.html">Group/herd1</a>  &quot;Breeding herd&quot;</span> </p> <p> <b> encounter</b> : <span> : part of a health assurance program</span> </p> <p> <b> effective</b> : 2017-11-20</p> <p> <b> value</b> : <span title="   In FHIR, units may be represented twice. Once in the
    agreed human representation, and once in a coded form.
    Both is best, since it's not always possible to infer
    one from the other in code.

    When a computable unit is provided, UCUM (http://unitsofmeasure.org)
    is always preferred, but it doesn't provide notional units (such as
    &quot;tablet&quot;), etc. For these, something else is required (e.g. SNOMED
         CT)
     ">0.2 % (sample/positive control)<span style="background: LightGoldenRodYellow"> (Details: UCUM code % = '%')</span> </span> </p> <p> <b> interpretation</b> : Negative <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> (<a href="http://terminology.hl7.org/5.5.0/CodeSystem-v3-ObservationInterpretation.html">ObservationInterpretation</a> #NEG)</span> </p> <p> <b> specimen</b> : <span title="  Specimen is a pooled serology sample of 30 animals. "><a href="specimen-example-pooled-serum.html">Specimen/pooled-serum: 30 serum</a> </span> </p> <h3> ReferenceRanges</h3> <table class="grid"><tr> <td style="display: none">-</td> <td> <b> Text</b> </td> </tr> <tr> <td style="display: none">*</td> <td> &gt;0.4 Positive; 0.3 to 0.4 Suspect &lt; 0.3 Negative</td> </tr> </table> </div> </text> <status value="final"/> 
      <!--    category code is A code that classifies the general type of observation being
   made. This is used for searching, sorting and display purposes.   -->
  <category> 
    <coding> 
      <system value="http://terminology.hl7.org/CodeSystem/observation-category"/> 
      <code value="laboratory"/> 
      <display value="Laboratory"/> 
    </coding> 
    <text value="Laboratory"/> 
  </category> 
      <!--    
    Observations are often coded in multiple code systems.
      - LOINC provides codes of varying granularity (though not usefully more specific
   in this particular case) and more generic LOINCs  can be mapped to more specific
   codes as shown here
      - snomed provides a clinically relevant code that is usually less granular
   than LOINC
      - the source system provides its own code, which may be less or more granular
   than LOINC
      -->
  <code> 
        <!--     LOINC - always recommended to have a LOINC code     -->
    <coding> 
      <system value="http://loinc.org"/> 
      <code value="80219-9"/> 
          <!--   more generic methodless LOINC   -->
      <display value="Mycoplasma hyopneumoniae Ab sample/Positive control in Serum by Immunoassay"/> 
    </coding> 
        <!--     Also, a local code specific to the source system     -->
    <coding> 
      <system value="http://acme.org/devices/clinical-codes"/> 
      <code value="Mycoplasma"/> 
      <display value="Mycoplasma"/> 
    </coding> 
    <text value="Mycoplasma hyopneumoniae - MHP"/> 
  </code> 
      <!--      subject is a herd of 2500 breding sows    -->
  <subject> 
    <reference value="Group/herd1"/> 
  </subject> 
  <encounter> 
    <display value="part of a health assurance program"/> 
  </encounter> 
  <effectiveDateTime value="2017-11-20"/> 
      <!--     In FHIR, units may be represented twice. Once in the
    agreed human representation, and once in a coded form.
    Both is best, since it's not always possible to infer
    one from the other in code.

    When a computable unit is provided, UCUM (http://unitsofmeasure.org)
    is always preferred, but it doesn't provide notional units (such as
    "tablet"), etc. For these, something else is required (e.g. SNOMED CT)
       -->
  <valueQuantity> 
    <value value="0.2"/> 
    <unit value="% (sample/positive control)"/> 
    <system value="http://unitsofmeasure.org"/> 
    <code value="%"/> 
  </valueQuantity> 
  <interpretation> 
    <coding> 
      <system value="http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation"/> 
      <code value="NEG"/> 
      <display value="Negative"/> 
    </coding> 
    <text value="Negative"/> 
  </interpretation> 
      <!--    Specimen is a pooled serology sample of 30 animals.   -->
  <specimen> 
    <reference value="Specimen/pooled-serum"/> 
    <display value="30 serum"/> 
  </specimen> 
  <referenceRange> 
    <text value="&gt;0.4 Positive; 0.3 to 0.4 Suspect &lt; 0.3 Negative"/> 
  </referenceRange> 
</Observation>