Example of an Observations made about a location - an oyster farm (id = "vp-oyster")

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

<!--    This is an example of Observations made about something other than a patient
 - namely a location   --><Observation xmlns="http://hl7.org/fhir">
  <id value="vp-oyster"/> 
  <contained> 
    <Specimen> 
      <id value="bed1"/> 
      <note> 
        <text value="Live Oysters Acc#20171014-1234 from Bed 1"/> 
      </note> 
    </Specimen> 
  </contained> 
  <contained> 
    <Specimen> 
      <id value="bed2"/> 
      <note> 
        <text value="Live Oysters Acc#20171014-1234 from Bed 2"/> 
      </note> 
    </Specimen> 
  </contained> 
  <contained> 
    <Group> 
      <id value="group1"/> 
      <type value="animal"/> 
      <membership value="enumerated"/> 
      <member> 
        <entity> 
          <reference value="#bed1"/> 
        </entity> 
      </member> 
      <member> 
        <entity> 
          <reference value="#bed2"/> 
        </entity> 
      </member> 
    </Group> 
  </contained> 
  <identifier> 
    <use value="official"/> 
    <system value="http://sonomacounty.ca.gov/Health/Public-Health/Laboratory"/> 
    <value value="20171014-1234"/> 
  </identifier> 
  <status value="preliminary"/> 
  <!--  
    Observations are often coded in multiple code systems.
      - LOINC
    - or SNOMED
      -and/or the source system may provides its own "local" code, which may be
   less or more granular than LOINC.
  In this example there is only local codes
     -->
  <code> 
    <!--   Should use a  proper LOINC code    -->
    <coding> 
      <system value="http://loinc.org"/> 
      <code value="41857-4"/> 
      <display value="Vibrio parahaemolyticus DNA [Presence] in Specimen by NAA with probe detection"/> 
    </coding> 
    <!--   here is the local code   -->
    <coding> 
      <system value="http://sonomacounty.ca.gov/Health/Public-Health/Laboratory/test-codes"/> 
      <code value="VP MULTI PCR"/> 
      <display value="VP MULTI PCR"/> 
    </coding> 
    <text value="OYSTER TESTING"/> 
  </code> 
  <subject> 
    <!--   reference value="Location/oyster-farm"/   -->
    <display value="Sonoma oyster farm"/> 
  </subject> 
  <effectiveDateTime value="2017-10-12"/> 
  <issued value="2017-10-14T23:11:24Z"/> 
  <performer> 
    <reference value="Practitioner/f005"/> 
    <display value="A. Langeveld"/> 
  </performer> 
  <!--   results of this Qualtiattive PCR is a choice of Positive/Negative and Inconclusive
     -->
  <valueCodeableConcept> 
    <!--   SNOMED CT codes   -->
    <coding> 
      <system value="http://snomed.info/sct"/> 
      <code value="10828004"/> 
      <display value="Positive (qualifier value)"/> 
    </coding> 
    <!--   local code translation   -->
    <coding> 
      <system value="http://sonomacounty.ca.gov/Health/Public-Health/Laboratory/result-codes"/> 
      <code value="POSITIVE"/> 
      <display value="POSITIVE"/> 
    </coding> 
    <text value="POSITIVE"/> 
  </valueCodeableConcept> 
  <interpretation> 
    <coding> 
      <system value="http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation"/> 
      <code value="A"/> 
      <display value="Abnormal"/> 
    </coding> 
  </interpretation> 
  <specimen> 
    <reference value="#group1"/> 
  </specimen> 
  <referenceRange> 
    <text value="NEGATIVE"/> 
  </referenceRange> 
</Observation>