Malaria Testing in Nigeria: When to Test and Which Laboratory Tests Are Used

In Nigeria, it is easy to assume that a fever, headache or body pain means malaria. It is an illness many people are familiar with, so when these symptoms appear, the first thought is often to buy antimalarial medicine and start treatment.

But here is the problem: not every fever is malaria, and the symptoms alone cannot confirm the infection. Typhoid fever, other infections and several medical conditions can cause similar symptoms. Treating yourself for malaria without testing may delay the treatment you actually need.

So, when should you get tested for malaria? Which laboratory test should you choose, and what happens if your result is negative even though you still feel unwell? Let's look at what you need to know.

When Should You Get Tested for Malaria?

You should consider malaria testing when you develop symptoms that could indicate an infection, particularly if you live in or have recently travelled to an area where malaria occurs.

Common symptoms include:

• Fever or an unusually high body temperature

• Headache

• Chills or shivering

• Sweating

• Muscle and body pains

• Weakness or unusual tiredness

• Nausea or vomiting

Some people also experience reduced appetite or general discomfort. However, these symptoms are not exclusive to malaria, which is why testing is important.

You should also seek medical advice if symptoms continue after treatment, return shortly after improving or become worse. A healthcare professional can determine whether repeat testing or investigation for another illness is necessary.

Do not wait for every symptom to appear before seeking help. Malaria can become severe, and early assessment is particularly important for young children, pregnant women and people with other conditions that may increase their risk.

Which Laboratory Tests Are Used to Diagnose Malaria?

Malaria testing involves looking for evidence of the parasite or detecting substances produced by it. The two main methods used in routine diagnosis are the malaria rapid diagnostic test and blood-film microscopy. The World Health Organization recommends parasite-based testing before antimalarial treatment is given to patients with suspected malaria.

1. Malaria Rapid Diagnostic Test (RDT)

The malaria rapid diagnostic test is a convenient way to check for malaria, especially when a quick result is needed.

The test usually uses a small blood sample collected from a finger prick. It detects specific proteins, called antigens, associated with malaria parasites. Depending on the test kit, it may detect Plasmodium falciparum alone or identify other malaria parasite types as well.

One reason RDTs are widely used is speed. Many kits produce results within approximately 15–30 minutes, although the actual turnaround time depends on the test and the facility.

When is an RDT useful?

It is often suitable when someone needs prompt testing and a reliable microscopy service is not readily available. However, the test must be performed and interpreted correctly using an appropriate, quality-assured kit.

An RDT also has limitations. It may miss some infections, particularly when parasite levels are low. In addition, certain tests can remain positive for a period after treatment because parasite antigens may persist even after the parasites have been cleared.

For this reason, someone who has recently received malaria treatment should tell the healthcare professional before being tested again.

2. Malaria Microscopy (Blood Film Test)

Malaria microscopy involves examining a blood sample under a microscope to look for malaria parasites.

A laboratory professional prepares and stains a blood film before examining it for evidence of infection. This method can provide additional information beyond a simple positive or negative result.

Two types of blood films are commonly used:

Thick blood film: This concentrates a larger amount of blood for examination and is particularly useful for detecting malaria parasites.

Thin blood film: This helps the laboratory identify the malaria parasite species and assess the appearance of infected red blood cells.

Microscopy can also estimate the number of parasites present in the blood, which may help clinicians assess the severity of infection and investigate possible treatment failure.

However, the quality of the result depends on factors such as sample preparation, the equipment available and the experience of the person examining the slide.

For someone who has recently taken antimalarial medicine, has a negative RDT despite continuing symptoms or needs further investigation, a healthcare professional may consider microscopy or another appropriate assessment.

3. PCR Testing for Malaria

Polymerase chain reaction (PCR) is a molecular method that detects malaria parasite genetic material.

It can be useful in specialised diagnostic settings, research and situations where more detailed parasite identification is needed. Molecular testing may also help investigate infections that are difficult to detect using routine methods.

However, PCR is not usually the first test needed for an uncomplicated suspected malaria infection. RDTs and microscopy remain the principal methods used for routine diagnosis.

Your healthcare professional can advise whether specialised testing is appropriate for your circumstances.

Malaria RDT vs Microscopy: Which Should You Choose?

Both tests can help confirm malaria, but they work differently and have different advantages.

There is no need to assume that one test is always better for every situation. The appropriate option depends on your symptoms, recent treatment, the laboratory's capabilities and the clinical question being investigated.

For routine suspected malaria, a quality-assured RDT or competent microscopy service can provide the necessary diagnostic evidence. Your healthcare professional can determine whether further testing is warranted.

What If Your Malaria Test Is Negative?

This is one of the most important things to understand about malaria testing.

If your result is negative, it does not mean you should ignore your symptoms. It means that the test did not detect evidence of malaria under the conditions in which it was performed.

There are several possible explanations. You may have an illness other than malaria, the infection may be present at a level the test did not detect, or there may have been a problem with the sample or testing process.

Depending on your condition, a healthcare professional may recommend a repeat test, microscopy after an RDT or an investigation for other causes of fever.

Other possibilities include respiratory infections, urinary tract infections and other illnesses that require different treatment. A clinician should decide which possibilities need to be investigated based on your symptoms and examination.

Avoid repeatedly buying antimalarial medicines simply because you still feel unwell. If your test is negative and your symptoms continue, get reassessed rather than assuming the test must be wrong.

Should You Take Malaria Medicine Before Testing?

Whenever possible, you should be tested before starting antimalarial treatment.

Taking medicine before testing can complicate the interpretation of results, depending on the medicine, the test used and the timing. Some rapid tests may remain positive after treatment, while microscopy findings can also be affected by changes in parasite levels.

Testing first helps healthcare professionals make a more informed decision about treatment and reduces unnecessary use of antimalarial medicines.

If you have already taken medication, do not hide that information or delay seeking care. Tell the healthcare professional what you took, how much you took and when you took it.

If you are seriously ill, seek urgent medical attention rather than delaying care while trying to arrange a test independently.

How Much Does Malaria Testing Cost in Nigeria?

The cost of malaria testing varies across Nigeria. It may depend on whether you visit a public hospital, private hospital, diagnostic laboratory or another healthcare facility, as well as the test performed and any additional consultation charges.

An RDT and a microscopy test may have different prices. More specialised testing, such as PCR, may cost considerably more and is not routinely required for uncomplicated malaria.

Before visiting a facility, ask which malaria test is available, the cost, how long the result will take and whether a consultation fee is charged separately.

You can also explore AnalysisAfrica's available medical testing services to learn more about laboratory testing options.

How to Prepare for a Malaria Test

Routine malaria testing generally does not require fasting. You can usually eat and drink normally unless your healthcare professional has given you different instructions because other tests are being performed at the same time.

A few details can help the healthcare professional interpret your result correctly:

• Explain when your symptoms began.

• Mention any antimalarial medicine you have already taken.

• Tell the healthcare professional if you have recently had malaria.

• Share information about other medicines you are using.

• Follow the laboratory's instructions for sample collection.

The test itself is usually straightforward, but providing accurate information can make a difference when your result needs to be interpreted alongside your symptoms.

When Is Malaria an Emergency?

Malaria can become dangerous if it progresses to severe disease. Seek urgent medical attention if someone with suspected malaria develops confusion, seizures, difficulty breathing, fainting, extreme weakness, inability to drink or repeated vomiting that prevents them from keeping fluids down.

Young children and pregnant women need particular care because malaria can carry additional risks for them.

Do not wait for a routine laboratory appointment if severe symptoms are present. Emergency assessment and treatment should not be delayed.

Get Tested, Then Take the Right Next Step

Malaria is treatable, but the right treatment starts with understanding what is causing the illness. A fever may be malaria, but it may also point to another condition that requires a different approach.

If you have symptoms, seek testing and professional advice rather than relying on symptoms alone or taking medication without confirmation. If your result is negative but you remain unwell, follow up so that other causes can be investigated.

For more health and laboratory information, read other articles on the AnalysisAfrica blog. You can also follow AnalysisAfrica on X, connect with us on Instagram and watch our videos on YouTube.

Conclusion

In Nigeria, malaria is commonly suspected when fever, headache, chills or body pains develop, but symptoms alone cannot confirm the infection. The main tests used for routine diagnosis are the malaria rapid diagnostic test and blood-film microscopy. PCR is available for selected specialised situations.

Testing before treatment helps healthcare professionals choose appropriate care. If a result is negative and symptoms persist, further assessment may be needed rather than assuming malaria is still the cause.