```xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns4:query_definition xmlns:ns2="http://www.i2b2.org/xsd/cell/crc/psm/1.1/" xmlns:ns4="http://www.i2b2.org/xsd/cell/crc/psm/querydefinition/1.1/" xmlns:ns3="http://www.i2b2.org/xsd/cell/crc/psm/analysisdefinition/1.1/">
    <query_name>Encount-Screeni@18:49:50</query_name>
    <query_timing>ANY</query_timing>
    <specificity_scale>0</specificity_scale>
    <panel>
        <panel_number>1</panel_number>
        <panel_timing>ANY</panel_timing>
        <panel_accuracy_scale>100</panel_accuracy_scale>
        <invert>0</invert>
        <total_item_occurrences>1</total_item_occurrences>
        <item>
            <hlevel>3</hlevel>
            <item_name>Encounter for screening for infectious and parasitic diseases</item_name>
            <item_key>\\ICD10_ICD9\Diagnoses\(Z00-Z99) Fact~rmj9\(Z00-Z13) Pers~m0l3\(Z11) Encounte~xfu3\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Factors influencing health status and contact with health services (z00-z99) \ Persons encountering health services for examinations (z00-z13)
 \ Encounter for screening for infectious and parasitic diseases</tooltip>
            <class>ENC</class>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
    <panel>
        <panel_number>2</panel_number>
        <panel_timing>ANY</panel_timing>
        <panel_accuracy_scale>100</panel_accuracy_scale>
        <invert>0</invert>
        <total_item_occurrences>1</total_item_occurrences>
        <item>
            <hlevel>3</hlevel>
            <item_name>Screening is the testing for disease or disease precursors in asymptomatic individuals so that early detection and treatment can be provided for those who test positive for the disease.</item_name>
            <item_key>\\ICD10_ICD9\Diagnoses\(Z00-Z99) Fact~rmj9\(Z00-Z13) Pers~m0l3\(Z11) Encounte~xfu3\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Factors influencing health status and contact with health services (z00-z99) \ Persons encountering health services for examinations (z00-z13)
 \ Screening is the testing for disease or disease precursors in asymptomatic individuals so that early detection and treatment can be provided for those who test positive for the disease.</tooltip>
            <class>ENC</class>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
</ns4:query_definition>

```

I want to find all encounters related to screening for infectious and parasitic diseases, where the patient has been tested for these diseases in an asymptomatic state, in order to provide early detection and treatment for those who test positive. The query should search for diagnoses, factors influencing health status, and contact with health services, with a high level of specificity and accuracy.