SARS-CoV-2 infection virological diagnosis

Area of Science:

• Virology
• Infectious Diseases
• Diagnostic Medicine

Background:

• Accurate diagnosis of SARS-CoV-2 infection is essential for patient management and public health.
• Multiple diagnostic methods exist, but their reliability, sensitivity, and specificity vary significantly.
• Test selection must consider the stage of the disease and laboratory capabilities.

Purpose of the Study:

• To evaluate the reliability of different diagnostic tests for SARS-CoV-2 infection.
• To provide guidance on selecting the most appropriate diagnostic test based on disease stage and performance characteristics.

Main Methods:

• Review of current diagnostic techniques for SARS-CoV-2, including RT-PCR, rapid PCR, antigen detection, and antibody detection.
• Analysis of test performance metrics such as sensitivity, specificity, and suitability for different clinical and laboratory settings.

Main Results:

• Reverse transcription-polymerase chain reaction (RT-PCR) is the most reliable method for confirming acute SARS-CoV-2 infection in a Class II biological safety laboratory.
• RT-PCR sensitivity can decrease in later stages of infection and is dependent on sample quality.
• Antigen tests lack sufficient specificity and sensitivity for diagnosis and patient management; antibody tests are better suited for epidemiological studies.

Conclusions:

• RT-PCR remains the gold standard for acute SARS-CoV-2 diagnosis, despite limitations.
• Rapid PCR offers faster results but is not ideal for high-throughput laboratories.
• Further research is needed to develop more sensitive and specific diagnostic tests for all stages of SARS-CoV-2 infection.