Improved AIDS surveillance through laboratory-initiated CD4 cell count reporting

Area of Science:

• Public Health
• Epidemiology
• Infectious Disease Surveillance

Background:

• Traditional surveillance methods for Acquired Immunodeficiency Syndrome (AIDS) rely on healthcare provider reports, death certificates, and medical record reviews.
• Evaluating alternative surveillance methods is crucial for comprehensive AIDS case detection and public health monitoring.

Purpose of the Study:

• To assess the utility of laboratory-initiated CD4 reporting (LICR) for AIDS surveillance.
• To compare the characteristics of AIDS cases identified through LICR versus traditional methods.

Main Methods:

• A comparative analysis was conducted on AIDS cases reported between May 1993 and April 1994.
• Data sources included traditional surveillance reports and LICR with CD4 counts below 200 cells/microliter.
• Characteristics of identified cases, including demographics and opportunistic illnesses, were compared.

Main Results:

• 643 LICR reports were received, with 96% of individuals confirmed as HIV-infected.
• LICR identified 90% of all AIDS cases, revealing differences in case demographics (e.g., rural populations) and opportunistic illnesses compared to traditional methods.
• The cost of LICR surveillance was found to be significantly lower than employing a single research analyst.

Conclusions:

• LICR demonstrates high sensitivity, timeliness, and a positive predictive value for AIDS surveillance.
• This method is a cost-effective alternative or supplement to traditional surveillance strategies.
• LICR implementation should be considered by other public health jurisdictions for enhanced AIDS monitoring.