Dengue Classification : Mnemonic

Table of Contents

Probable Dengue

Mnemonic: FEVeR TLC (Send Total Leukocyte Count in Fever)

a. Fever
b. Endemic area (living or travel)

c. Vomiting and nausea
d. Rash
e. Tourniquet test positive
f. Leukopenia (EARLIEST sign)
g. Cramps and cries (Aches and pains)

Probable dengue: Both a and b + atleast 2 of others

Tourniquet test: Inflate the BP cuff between SBP and DBP and keep it inflated for 5 minutes:
>20 petechiae in 1 inch square indicates capillary fragility.

dengue classification

Warning Signs

Mnemonic: LIVER HCT

a. Liver Increased >2 cm
b. Vomiting persistent
c. Epistaxis (mucosal bleed)
d. Restlessness or lethargy
e. Hematocrit increase + platelet decrease
f. Clinical fluid accumulation
f. Tender or painful abdomen

Other warning signs: Pregnancy, Infancy, Old age, Diabetes mellitus, Renal failure, Living alone, Living far from home

Severe Dengue

Mnemonic: BCDEF

a. Severe plasma leakage
b. Severe bleeding
c. Severe organ impairment

a. Bleeding (severe as assessed by Clinician)

b. Cardiac, CNS and other organs involved severely (Impaired consciousness, AST/ALT >/= 1000, etc.)

c. Decompensation of chronic disease

d. Epistaxis (minor bleeding) with thrombocytopenia (platelet <20,000/

e. Fluid leak (Shock or respiratory distress with fluid accumulation)

Confirmatory lab tests

a. Serology IgM
c. NS1 antigen


Ajlan BA, Alafif MM, Alawi MM, Akbar NA, Aldigs EK, Madani TA (2019) Assessment of the new World Health Organization’s dengue classification for predicting severity of illness and level of healthcare required. PLoS Negl Trop Dis 13(8): e0007144.

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