Malaria v1

Query purpose: 

Created by the CDC National Syndromic Surveillance Program (NSSP) for use with ED data as part of the rapid reportables project, which seeks to create queries for all National Notifiable Diseases defined by the National Notifiable Diseases Surveillance System (NNDSS). This query is intended to be a version 1 and may be further improved upon by the NSSP community of practice in the future. This query is intended to be narrow and capture visits with specific terms to support greater monitoring and actionable public health data. More complex and/or broader queries may exist that more broadly capture symptoms or travel-based terms.

How it was developed: 

1. The CDC team used the NNDSS case definition of malaria Infections to identify diagnostic codes (International Classification of Diseases, 9th & 10th Revisions (ICD-9-CM, ICD-10-CM), SNOMED Clinical Terms (CT)) and chief complaint free text for syndrome development.
2. The codes and free text were then categorized as inclusion or exclusion terms. These terms were formatted for querying in ESSENCE.
3. Text analysis was conducted on the initial query to find additional inclusion or exclusion terms.
4. The query was cross-checked internally by NSSP and by CDC subject matter experts as needed.

How it works:

The Chief Complaint Discharge Diagnosis (CCDD) parsed field is used to query both the discharge diagnosis codes and chief complaint free text.

• Inclusion based on malaria-related chief complaint free-text terms:
  • The visit is included if it contains:
    1. Chief complaints related to the pathogen name – (“malaria”, “Plasmodium”) OR
• Inclusion based on ICD-10 discharge diagnosis codes related to malaria:
  • The visit is included if it contains:
    1. A discharge diagnosis code of Plasmodium falciparum malaria (B50) OR
    2. A discharge diagnosis code of Plasmodium vivax malaria (B51) OR
    3. A discharge diagnosis code of Plasmodium malariae malaria with nephropathy (B52) OR
    4. A discharge diagnosis code of Plasmodium ovale malaria (B53) OR
    5. A discharge diagnosis code of Unspecified malaria (B54) OR
• Inclusion based on SNOMED discharge diagnosis codes related to malaria:
  • The visit is included if it contains:
    1. A discharge diagnosis code of Malaria (61462000) OR
    2. A discharge diagnosis code of Plasmodium ovale malaria (19341001) OR
    3. A discharge diagnosis code of Plasmodium vivax malaria (27052006) OR
    4. A discharge diagnosis code of Plasmodium falciparum malaria (62676009) OR
    5. A discharge diagnosis code of Quartan malaria (27618009) OR
    6. A discharge diagnosis code of Plasmodium malariae malaria with nephropathy (186796004) OR
    7. A discharge diagnosis code of Plasmodium vivax malaria with rupture of spleen (186792002) OR
    8. A discharge diagnosis code of Disorder of glomerulus caused by Plasmodium malariae (1260350001) OR
    9. A discharge diagnosis code of Malaria caused by Plasmodium not Plasmodium falciparum (722888000) OR
    10. A discharge diagnosis code of Plasmodium falciparum malaria with cerebral complications (186791009)
• No exclusion terms or codes are used in this query.