Symptoms of Walking Pneumonia (Mycoplasma) in Children

Walking pneumonia is an atypical lung infection that does not confine a child to bed but causes a persistent cough and fatigue lasting for weeks. Medically referred to as atypical pneumonia, this condition usually begins like a standard cold or the flu, but instead of subsiding over time, the symptoms change shape and linger. Unlike classic pneumonia, which brings sudden high fevers or severe chills, it follows a sneakier course that allows the child to continue their daily life, including going to school.

• The most common cause of the disease is a bacterium called Mycoplasma pneumoniae.
• The incubation period is long; complaints begin 1 to 4 weeks after the microbe enters the body.
• The most prominent feature is a dry cough that worsens at night and can last for weeks.
• High fever is not always present; the persistent fever is usually low-grade.
• It does not respond to classic penicillin-group antibiotics; different classes of medications are used for treatment.
• It is most frequently seen in school-aged children between 5 and 15 years old.

What is Walking Pneumonia?

Walking pneumonia is a milder form of pneumonia—which means inflammation of the lung tissue—caused by a different microbial structure. Classic pneumonia is generally a severe condition that ties the patient to their bed, presenting with high fever, intense chest pain, and a phlegmy cough. Atypical pneumonia, on the other hand, might slightly lower the child's energy but still allows them to play, eat, and carry on with their daily activities. This nature of the disease, which does not render the patient bedridden, has led to it being popularly called "walking pneumonia."

The most frequent culprit behind this illness is Mycoplasma pneumoniae, a special type of bacterium that lacks a cell wall. The absence of a cell wall places this bacterium in a very distinct category in the medical world. This is because many standard antibiotics frequently prescribed for childhood infections work by breaking down bacterial cell walls. Since the mycoplasma bacterium lacks this wall, the disease shows resistance to classic treatments, causing symptoms to drag on. Therefore, making an accurate diagnosis is vital for bringing the infection under control.

Causes and Risk Factors

The primary cause of mycoplasma infections in children is the inhalation of airborne droplets spread when a sick individual coughs, sneezes, or speaks. Once the bacteria settle in the respiratory tract, they multiply slowly and progress toward the lower parts of the lungs. The incubation period of the disease is quite long. Symptoms may appear weeks after your child catches the microbe. This prolonged incubation period makes it easy for the infection to spread silently in schools and daycares.

Crowded and enclosed environments are at the top of the list of risk factors. In major metropolitan areas like Istanbul, poorly ventilated classrooms during the winter months, crowded school buses, and indoor play areas significantly increase the risk of transmission. The disease mostly affects school-aged children between 5 and 15 years old. However, it can also be seen in younger children whose immune systems are not yet fully developed. Children with an underlying respiratory sensitivity, such as asthma or bronchitis, are particularly vulnerable to this bacterium and may experience a more severe course of the infection.

Symptoms of Atypical Pneumonia in Children

In its early days, the symptoms of atypical pneumonia are indistinguishable from an ordinary upper respiratory tract infection. For the first few days, mild sore throat, headache, nasal congestion, and fatigue are observed. At this stage, families usually think they are dealing with a simple cold. However, as days pass, the complaints shift direction rather than regress. The most typical sign is a persistent, dry, and tickly cough that eventually wakes the child from sleep at night. The cough may become slightly productive over time, but it does not produce the thick, rust-colored phlegm seen in classic pneumonia.

Another important symptom is a lingering fever. The fever generally hovers around 38 to 38.5°C; it rarely reaches very high numbers but can stubbornly persist for days. A noticeable loss of appetite, muscle pain in the chest area due to coughing, and mild shortness of breath may also accompany the clinical picture. In younger children, respiratory distress can manifest as wheezing. For more detailed information on this topic, you can review our article titled Wheezing in Babies and Winter Infections.

Transmission and the Hospital Diagnosis Process

The disease is transmitted directly through the respiratory tract. Invisible droplets spread into the environment during a sick child's coughing fits reach the respiratory tracts of healthy children, initiating the infection. The contagious period is quite long; the child can continue to spread the microbe for several days before symptoms start and throughout the weeks the cough continues. Because of this, it is highly common to see it spread as mini-epidemics in schools.

The diagnostic process begins with a detailed examination by an experienced pediatrician. When the doctor listens to the child's lungs with a stethoscope, they might hear no abnormal sounds at all or detect very faint crackles (rales). For a definitive diagnosis, a chest X-ray is usually ordered. Instead of the dense white spots seen in classic pneumonia, the X-ray reveals patchy and thin-looking inflammatory areas (interstitial infiltrates) spread over a wider area of the lung. When necessary, the presence of the bacteria is conclusively proven through blood tests measuring mycoplasma antibodies (IgM and IgG) or PCR tests performed from a throat swab.

Walking Pneumonia Treatment and Home Care

Treating walking pneumonia requires a specific approach due to the structure of the bacteria causing it. Because the mycoplasma bacterium lacks a cell wall, amoxicillin or penicillin-derivative antibiotics frequently used in childhood infections are ineffective against this disease. Your doctor will plan a different antibiotic treatment, typically from the macrolide group, which specifically targets this bacterium. After starting the antibiotics, the fever usually drops within 3 to 5 days, and the child's general condition improves. However, it can take 3 to 4 weeks for the cough to disappear completely.

Alongside the medical treatment planned at the hospital, home care is a critical part of the recovery process. Ensuring the child drinks plenty of fluids helps soften respiratory secretions, making them easier to expel. The child's room should be ventilated frequently, the ambient humidity should be balanced, and the child must get plenty of rest. Unless recommended by your physician, the use of cough-suppressant syrups is strictly not advised; this is because coughing is a natural defense mechanism that allows the inflammation in the lungs to be cleared out.

Complications and Risk Groups

Although walking pneumonia is generally a mild disease, it can lead to certain complications if left untreated or in children belonging to risk groups. The most frequently encountered issue is the disease triggering asthma attacks. In children who have previously been diagnosed with asthma or have a history of allergic bronchitis, a mycoplasma infection can cause severe shortness of breath and wheezing. Furthermore, the infection may not remain limited to the lungs and can develop into a middle ear infection (otitis) or sinusitis.

In rare cases, the bacteria can overstimulate the body's immune system, leading to skin rashes (erythema multiforme), joint pain, or mild anemia. Children whose immune systems weaken in the school environment become susceptible to different bacterial infections during the same period. Similarly, if you would like to learn about other infections commonly seen in schools, you can take a look at our article Beware of Strep Throat (Beta) in Children: Symptoms and Treatment. Early diagnosis and the correct use of antibiotics minimize all these complication risks.

When to See a Doctor?

If your child has had a cough lasting for weeks, a physician's evaluation is absolutely necessary. However, some symptoms indicate that the disease has moved past a mild course and reached a dangerous level, requiring immediate medical attention. If the child's condition worsens despite the supportive care you provide at home, you should closely monitor for signs of respiratory distress.

• A noticeable increase in the breathing rate (rapid breathing).
• The spaces between the ribs, the base of the neck, or the abdominal area pulling inward while breathing (retractions).
• A bluish tint (cyanosis) appearing on the lips, around the tongue, or at the nail beds.
• Fever rising to 39°C and above, and not dropping despite fever-reducing medications.
• The child having difficulty waking up, being excessively lethargic, and unresponsive.
• Fluid intake stopping completely and urine output decreasing significantly.

If you observe any of the symptoms above, you should go to the emergency room or, if the situation appears critical, call the 112 emergency helpline immediately.

The Process at BHT CLINIC İstanbul Tema Hastanesi

When you observe persistent complaints like a lingering cough and fever in your child, it is of great importance to consult an experienced team of specialists for an accurate diagnosis and treatment. In our Pediatrics (Child Health and Diseases) department, all necessary physical examinations, radiological imaging (chest X-rays), and laboratory tests for our patients suspected of having atypical pneumonia are carried out swiftly and reliably.

Our hospital, accredited by JCI and located in Küçükçekmece, adopts up-to-date medical approaches in the diagnosis and treatment of childhood infections. For unexpected situations and urgent scenarios like respiratory distress or high fever developing outside of regular working hours, our 24/7 emergency department and fully equipped laboratory infrastructure are always at your side. You can book an appointment to have your child's health evaluated and consult with our specialist physicians to initiate a safe treatment process.

Frequently Asked Questions

Does walking pneumonia go away on its own?

In mild cases, the immune system can defeat the disease, but this process can take weeks. Because it is a bacterial infection, taking an appropriate antibiotic treatment under a doctor's supervision is recommended to speed up recovery and prevent complications.

Is mycoplasma infection contagious?

Yes, it is highly contagious. It passes from person to person through droplets spread into the air during coughing, sneezing, and talking. The risk of transmission is especially high in enclosed spaces like schools, daycares, and school buses.

Can my child go to school while having walking pneumonia?

If the child has a fever and is actively coughing severely, they should not be sent to school. Once antibiotic treatment has started and the fever has completely subsided, the child can return to school with your doctor's approval; however, the cough may continue for a while longer.

What is the difference between classic pneumonia and atypical pneumonia?

Classic pneumonia starts suddenly, causes high fever, severe chest pain, and thick phlegm, leaving the patient bedridden. Atypical pneumonia, on the other hand, starts slowly and presents with a mild fever and a dry cough that lasts for weeks; the child can usually continue their daily life.

How long does the cough last in walking pneumonia?

Even if appropriate antibiotic treatment is started, it takes time for the irritation in the respiratory tract to heal. While the fever and fatigue may pass within a few days, the dry cough can continue for 3 to 4 weeks, and sometimes even longer.

We wish you healthy days. For appointments and detailed information, you can reach us through our call center at 0850 811 34 00 or visit our appointment page.

This article is for informational purposes only; please consult your physician for diagnosis and treatment.