Under the National Vector Borne Disease Control Programme (NVBDCP), Acute Encephalitis Syndrome (AES) surveillance is conducted across endemic districts. For AES surveillance, the case definition requires acute onset of fever and a change in mental status (including confusion, disorientation, coma, or inability to talk). The minimum duration of altered mental status required to meet the AES case definition is:

• A Less than 1 hour
• B More than 2 hours ✓
• C More than 6 hours
• D More than 24 hours

Explanation

The NVBDCP AES surveillance case definition requires acute onset of fever AND a change in mental status lasting more than 2 hours (including confusion, disorientation, coma, or inability to talk). This cutoff of more than 2 hours distinguishes AES from transient post-ictal confusion or brief delirium.

Reference: National Vector Borne Disease Control Programme, Ministry of Health and Family Welfare, 2020 ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.