Dengue 2026: What the Surge Means for Clinics Running FBCs

Where dengue stands in October 2026

The figures change every day. The iDengue portal (idengue.mysa.gov.my) carries the current national count and the list of active hotspots; the milestones below show how fast 2026 has moved.

What the dengue CPG asks of a clinic with an FBC

Adult dengue in Malaysia is managed under the CPG Management of Dengue Infection in Adults (Third Edition, 2015) from the Ministry of Health’s MaHTAS section, together with the doctor’s judgement. These are the points that rest on the clinic’s blood count:

• Establish a baseline haematocrit (HCT) and white-cell count at the first visit for every suspected case, then monitor serial FBC and HCT as the illness progresses (Recommendation 1).
• Primary care providers without immediate haematocrit facilities or point-of-care tests should refer patients to the nearest health facility. An in-house analyser is what lets a clinic follow its own patients.
• Patients treated at home need daily follow-up, especially from day 3 of illness, until they have been afebrile for at least 24–48 hours without antipyretics, with the Outpatient Dengue Monitoring Record (Appendix 7).
• A raised HCT with a rapid drop in platelets is a warning sign. The CPG gives median normal HCT values for Malaysians: 46% for men under 60, 42% for men over 60 and 40% for women.
• The laboratory criterion for referral is a rising HCT with a falling platelet count — but the CPG is clear that referral rests on total assessment of the patient, never on one number.
• Suspected cases must be notified to the nearest health office within 24 hours of diagnosis, under the Prevention and Control of Infectious Diseases Act 1988 (Act 342).

Read next Platelets and haematocrit in dengueDenggi 2026 untuk klinik (BM)

Before the busy weeks: a clinic checklist

• Run controls every day before patient samples and after every reagent lot change. More samples make a drifting analyser more costly, not less.
• Look first at platelets and haematocrit on your Levey-Jennings charts — they are the two results dengue decisions rest on.
• Keep one sample type and one analyser per patient, venous or capillary, so day-to-day trends compare like with like.
• Refresh every staff member who draws blood on full EDTA fills, gentle inversion and checking for clots. A clotted or clumped tube can send a well patient to hospital.
• Aim to have the FBC result before the patient leaves, and agree which results the doctor sees at once.
• Book preventive maintenance now rather than in the middle of the peak, and keep the service number and a backup laboratory on the wall.
• When platelets clump in EDTA, note it on the patient record so every repeat sample goes straight into the right tube.

Read next Catching a falsely low platelet countDaily QC and Levey-Jennings chartsEDTA sample handling

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