MedDroidDengue vs Malaria
Dengue vs malaria: differences in symptoms, tests and treatment
Written & medically reviewed by Dr. Sanjay Anbu, MBBS · Last reviewed
Medically reviewedDengue is a virus spread by the day-biting Aedes mosquito; malaria is a parasite spread by the night-biting Anopheles mosquito. Dengue typically causes sudden high fever with severe body pain and a falling platelet count, while malaria classically causes fever with shaking chills and sweating that can come in cycles. Only a blood test can tell them apart, and both can become serious quickly.
Side-by-side comparison
| Feature | Dengue | Malaria |
|---|---|---|
| Cause | Dengue virus, spread by the Aedes mosquito, which bites mostly in the daytime | Plasmodium parasite (P. vivax and P. falciparum are common in India), spread by the Anopheles mosquito, which bites mostly at night |
| Typical symptoms | Sudden high fever, severe body and joint pain, pain behind the eyes, headache, rash; sometimes mild bleeding from gums or nose | Fever with shaking chills, then heavy sweating; headache, body ache, tiredness; sometimes yellow eyes or pale skin from anaemia |
| Onset & timing | Usually about 4 to 10 days after the mosquito bite; fever lasts about 2 to 7 days | Usually 1 to 4 weeks after the bite; P. vivax can come back (relapse) months later |
| Key tests | NS1 antigen in the first few days, dengue IgM/IgG antibodies later; CBC to follow platelet count and haematocrit | Blood smear under the microscope or a malaria rapid antigen test (RDT); CBC, liver and kidney tests in moderate or severe illness |
| Treatment approach | No specific antiviral. Fluids, rest, fever control as advised, and close monitoring of platelets and warning signs. Avoid ibuprofen and aspirin unless a doctor says otherwise | Specific antimalarial medicines chosen by a doctor according to the parasite type and severity. The full course must be completed |
| Danger signs | Bleeding, severe belly pain, repeated vomiting, restlessness or drowsiness, cold clammy skin, often around the time the fever settles | Confusion, fits, extreme weakness, dark urine, yellow eyes, breathing difficulty (severe malaria, usually P. falciparum) |
General patterns only. Symptoms overlap and vary from person to person. On a phone, scroll the table sideways to see both columns.
How doctors tell them apart
- Fever pattern: a continuous high fever with intense body pain suggests dengue; fever with chills and sweats that comes and goes suggests malaria.
- Platelets fall in both, but a steadily falling platelet count with a rising haematocrit is typical of dengue.
- A malaria smear or RDT and a dengue NS1 or antibody test are often done together, because the two can look alike and can even occur together.
- Travel or stay in a malaria-prone area and night-time mosquito exposure make malaria more likely.
- Doctors repeat tests if the first one is negative and the fever continues.
See a doctor urgently if
- Bleeding from gums or nose, blood in vomit, or black stools
- Severe belly pain or vomiting that will not stop
- Confusion, unusual drowsiness, fits or fainting
- Breathlessness, cold clammy skin or very little urine
- Yellow eyes or dark (cola-coloured) urine
- Fever in a pregnant woman, young child or elderly person
In an emergency, call your local emergency number (in India: 108 or 112).
Frequently asked questions
Can you have dengue and malaria at the same time?
Yes. Co-infection is possible in places where both are common, especially during and after the monsoon. That is why doctors may test for both.
Which mosquito spreads dengue and which spreads malaria?
Dengue is spread by the Aedes mosquito, which bites mainly in the daytime and breeds in clean stored water. Malaria is spread by the Anopheles mosquito, which bites mainly between dusk and dawn.
Does the platelet count fall in malaria?
It can. Low platelets are common in malaria too, so a low count alone does not prove dengue. Doctors read it together with other tests.
Is there a medicine to cure dengue like there is for malaria?
No. Malaria has specific medicines that kill the parasite. Dengue has no specific antiviral, so care focuses on fluids, monitoring and treating complications early.
Related pages
Conditions
Symptoms
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Not a diagnosis. This page gives general health information to help you talk to a doctor; it is not medical advice and does not replace an examination or tests. Do not start, stop or change any medicine without a qualified clinician. MedDroid is an AI medical assistant and can make mistakes. In an emergency, call your local emergency number (in India: 108 or 112).