20/08/2026
🦟🔥 “The same thing every day… chills, fever, sweating! Doctor… is this the flu or what?!”
It was 2:15 a.m… 🌙
A young man walked into the emergency department looking exhausted.
He was shivering from the cold 🥶
even though his temperature was 39.8°C 🔥
He said to the doctor:
— “Doctor, I don’t understand what’s happening to me!”
— “What’s happening?”
— “Every now and then, I suddenly feel freezing cold… I start shaking badly, then my temperature shoots way up… and after a while, I sweat heavily and feel like I’m getting better!” 😰
The doctor paused for a moment…
Then started asking some simple questions—but every question was important:
👨⚕️ “When did the symptoms start?”
— “About a week ago.”
👨⚕️ “Have you traveled recently?”
— “Yes.”
👨⚕️ “Where?”
He mentioned an area where malaria is common.
👨⚕️ “Were you exposed to mosquito bites?”
— “Of course… a lot of them.”
👨⚕️ “Did you take malaria prophylaxis while traveling?”
— “No… I thought they were just insects!” 🦟
And then…
🚨 The alarm bells went off in the doctor’s mind.
Malaria?
---
🦟 Why can malaria cause all of this?
Malaria is not a virus.
It is a parasitic infection caused by parasites of the genus:
🦠 Plasmodium
The infection is usually transmitted to humans through the bite of an infected female Anopheles mosquito.
After the bite, the parasite enters the body and begins a complex journey:
🦟 Mosquito
⬇️
🩸 Parasites enter the bloodstream
⬇️
🧬 They first reach the liver
⬇️
🩸 They then enter red blood cells
⬇️
💥 They multiply inside them, eventually causing the cells to rupture
⬇️
🔥 Fever attacks and other symptoms appear
And that’s where the real story begins…
---
🥶🔥 “Why does the patient shiver even though they have a high fever?”
A malaria attack may go through recognizable stages in some patients:
1️⃣ Chills and shivering 🥶
The patient may feel extremely cold and shake intensely.
Even though their body temperature is actually rising!
2️⃣ Fever 🔥
The temperature rises and may become very high.
Along with:
🤕 Headache
💪 Muscle aches
😴 Fatigue
🤢 Nausea or vomiting in some cases
3️⃣ Sweating 💦
After some time, the patient may sweat heavily, their temperature may fall, and they may temporarily feel better.
But…
⚠️ Not every case of malaria follows this classic pattern.
Symptoms can be irregular, especially early in the illness.
---
🧠 And here’s a very important detail…
Not every patient with malaria will tell you:
“My fever comes exactly every 48 hours!”
Periodic fever may be more obvious with certain malaria species, but in real-world clinical practice, the pattern can be irregular.
That’s why:
❌ You cannot rule out malaria simply because the fever doesn’t follow a specific schedule.
---
🩸 So, what might we see in the laboratory tests?
This is where the laboratory plays an important role. 🔬
We may find:
⬇️ Hemoglobin
due to destruction of red blood cells.
⬇️ Platelets
thrombocytopenia may occur.
Other changes may also appear on the CBC.
But…
🚨 CBC does NOT confirm malaria.
In other words, if you have:
Low Hb
Low platelets
that does not automatically mean malaria.
We need to move on to a malaria-specific test.
---
🔬 The classic important test:
🩸 Blood Film
And this is not simply “another blood test.”
We use:
🔬 Thick Blood Film
It is more sensitive for detecting parasites because a larger volume of blood is examined in a smaller area.
🎯 Its main purpose: increasing the chance of detecting the parasite.
---
🔬 Thin Blood Film
This provides more detailed information about the parasite within red blood cells.
It can help with:
🦠 Identifying the Plasmodium species
📊 Estimating parasitemia
🔬 Assessing the morphology of the parasite inside red blood cells.
The distinction between the Thick and Thin Blood Films is very important in malaria diagnosis.
---
🧪 Is there a faster test?
Yes 👇
⚡ Rapid Diagnostic Tests — RDTs
These are rapid tests that detect malaria-related antigens.
They can be particularly useful where reliable microscopy is not immediately available.
However, the choice of test depends on the clinical situation and available resources.
---
🧬 What about PCR?
In some situations, molecular tests such as:
PCR
can be used to detect the parasite’s genetic material.
However, in acute malaria, microscopy and rapid diagnostic tests have important roles depending on the clinical context.
---
🚨 And here’s the most important point in the entire post:
If the doctor suspects malaria…
❌ We cannot simply say:
“The test was negative once, so there’s no malaria.”
Especially when clinical suspicion remains high.
The number of parasites in the blood may be low early in the infection.
Repeated blood testing at intervals may therefore be needed according to clinical guidelines and the patient’s condition.
In other words:
🔬 A single negative result does not always mean the end of the story.
---
😰 So why are we particularly concerned about P. falciparum?
Because:
🦠 Plasmodium falciparum
can cause severe malaria rapidly and may lead to serious complications such as:
🧠 Altered consciousness or cerebral malaria
🩸 Severe anemia
🫘 Acute kidney injury
🫁 Respiratory distress or respiratory failure
🍬 Severe hypoglycemia
🩸 Severe circulatory and coagulation disturbances
And therefore…
🚨 Suspected malaria—especially after travel to a malaria-endemic area—is not something that should be delayed.
---
✈️ The question that could unlock the diagnosis:
When you see a patient with fever…
Don’t only ask:
❌ “Do you have a cough?”
❌ “Do you have a runny nose?”
❌ “Do you have a sore throat?”
Also ask:
🌍 “Where have you been during the past few weeks?”
✈️ “Have you traveled outside the country?”
🦟 “Were you exposed to mosquito bites?”
💊 “Were you taking malaria prophylaxis?”
📅 “When did you return from your trip?”
Because sometimes…
The travel history can be more important than half the laboratory tests in front of you. 🔬
---
🎯 Let’s test you!
A patient returned from an area where malaria is common.
After some time, they developed:
🔥 Fever
🥶 Chills
💦 Sweating
🤕 Headache
😴 Severe fatigue
And the CBC showed:
⬇️ Hb
⬇️ Platelets
The doctor said:
“I suspect malaria.”
What would be the next step to help confirm the diagnosis?
🅰️ Repeat the CBC only
🅱️ Blood Film
🅲️ Blood glucose
🅳️ CRP only
👇 Write your answer before continuing!
---
✅ The answer:
🅱️ Blood Film
But ideally, we should not think about “one test” in isolation.
Diagnosis depends on:
👨⚕️ Clinical suspicion
+
✈️ Travel / Exposure history
+
🔬 Parasitological testing
And when clinical suspicion remains high, a single negative test should not lead to dismissal of the diagnosis without appropriate clinical assessment or repeat testing when indicated.
---
🦟 The takeaway:
Not every fever = influenza.
And not every chill = a viral infection.
Sometimes, one very simple question:
“Where have you traveled?” 🌍
can open the door to the entire diagnosis.
💬 Now it’s your turn:
If someone returns from a trip and, a few days later, develops fever + chills + heavy sweating…
What’s the first question you would ask?
👇 “Where did you travel?”
Or do you have an even more important question?
