ARCHIVED - Chlamydia (Chlamydia trachomatis Infection)
Nationally notifiable since 1990
1.0 National Notification
Only confirmed cases of disease should be notified.
2.0 Type of Surveillance
Routine case-by-case notification to the federal level
3.0 Case Classification
3.1 Confirmed case
Laboratory evidence of infection in genitourinary specimens:
- detection of C. trachomatis by culture
OR - detection of C. trachomatis nucleic acid
OR - detection of C. trachomatis antigen
3.2 Confirmed Case—Extra-genital infections
Laboratory evidence of infection in rectum, conjunctiva, pharynx and other extra-genital sites:
- detection of C. trachomatis by culture
OR - detection of C. trachomatis nucleic acid
OR - detection of C. trachomatis antigen
3.3 Confirmed Case—Perinatally Acquired Infections
Laboratory evidence of infection:
- Detection and confirmation of C. trachomatis in nasopharyngeal or other respiratory tract specimens from an infant in whom pneumonia developed in the first six months of life:
- isolation of C. trachomatis by culture
OR - demonstration of C. trachomatis nucleic acid
OR - demonstration of C. trachomatis antigen
OR - Detection and confirmation of C. trachomatis in conjunctival specimens from an infant who developed conjunctivitis in the first month of life:
- isolation of C. trachomatis by culture
OR - demonstration of C. trachomatis nucleic acid
OR - demonstration of C. trachomatis antigen
4.0 Laboratory Comments
IgM antibody detection is suitable for diagnosis of C. trachomatis pneumonia in infants < 3 months of age only.
5.0 Clinical Evidence
6.0 ICD Code(s)
6.1 ICD-10 Code(s)
A56
- Not specified
6.2 ICD-9 Code(s)
099.5, 099.41, 099.50, 099.52, 099.53, 099.54, 099.55
- Not specified
7.0 Type of International Reporting
None
8.0 Comments
Each case classification is mutually exclusive.
Individuals with more than one site of infection concurrently may fall under more than one case classification but will be counted as one case with multiple sites of infection identified to avoid duplicate counting of cases.
For information on reporting cases of Lymphogranuloma venereum (LGV) through the national LGV Enhanced Surveillance System, please refer to the Public Health Agency of Canada Web site: http://www.phac-aspc.gc.ca/publicat/lgv/lgvrdt_e.html.
9.0 References
Case definitions for diseases under national surveillance. CCDR 2000;26(S3). Retrieved May 2008, from http://www.phac-aspc.gc.ca/publicat/ccdr-rmtc/00vol26/26s3/index.html
Date of Last Revision/Review:
May 2008
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