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February 8, 2026Emerging infectious diseases0 citationsOpen Access

Detecting Influenza A(H5N1) Viruses through Severe Acute Respiratory Infection Surveillance, Cambodia

WDWilliam W. Davis KTKathrine R. Tan BSBorann Sar

Key Points

To evaluate the effectiveness of severe acute respiratory infection surveillance in identifying H5N1 cases in Cambodia.
Monitoring human cases of avian influenza A(H5N1) from January 2023 to March 2025.
Direct detection through SARI surveillance and indirect detection via testing close contacts.
Analysis of the detection rate of H5N1 through different surveillance methods.
Out of 19 human cases, 12 (63%) were identified through SARI surveillance.
SARI surveillance effectively identified a significant portion of H5N1 infections.
Surveillance methods provided a valuable complement to other detection strategies.

Abstract

Of 19 human cases of avian influenza A(H5N1) virus infection detected during January 2023-March 2025 in Cambodia, 12 (63%) were detected directly by surveillance for severe acute respiratory infection (SARI) or indirectly by testing ill close contacts. SARI surveillance can supplement other surveillance sources for identifying H5N1 cases.

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Davis et al. (Thu,) studied this question.

synapsesocial.com/papers/698828410fc35cd7a884795e https://doi.org/https://doi.org/10.3201/eid3203.250832

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