Atypical Pneumonia: Treatment and Prevention

Le atypical pneumonias include those that are not caused by typical bacteria such as Streptococcus pneumoniae, which represents the most common cause of community-acquired pneumonia (CAP). In contrast, atypical pneumonias are associated with less common pathogens and require a different diagnostic and therapeutic approach than traditional pneumonias. Aside from the different treatments, the symptoms and signs of these conditions are also different.

Index of topics

Pathogens of atypical pneumonia

Atypical pneumonias, which mainly affect children and adolescents, are caused by unconventional pathogens that include:

Mycoplasma pneumoniae: one of the most common pathogens of atypical pneumonia, particularly in young people. It mainly affects children between the ages of 2 and 4.
Chlamydia pneumoniae: another bacterium that causes atypical pneumonias, often milder than other types.
Legionella pneumophila: responsible for severe pneumonia, especially in immunocompromised or elderly individuals. These bacteria are widespread in natural aquatic environments, such as springs and thermal waters, rivers, and mud baths. This type of atypical pneumonia mainly affects people over 50 years of age.
Respiratory virusesVarious viruses, including influenza virus, respiratory syncytial virus (RSV), and coronavirus, can cause atypical viral pneumonia.
Coxiella burnetii: causes Q fever, a form of atypical pneumonia that can manifest with systemic and respiratory symptoms.

Generally, the pathogens that cause the various types of atypical pneumonia act gradually, and therefore the first symptoms are those that should not be underestimated.

Symptoms

Among the most frequent symptoms of atypical pneumonia are:

Temperature
He's out of breath
General malaise
Headache and nausea
Tosse irritable or productive (fat)
Chest pain

Symptoms, as we were saying, must be taken into consideration as soon as they appear, to make therapy more effective and timely.

Diagnosis

The clinical diagnosis of atypical pneumonia is also very different from that of other pneumonias. By listening to the lungs with a stethoscope, the doctor can hear sounds that indicate the presence of abnormal fluid in the pulmonary alveoli; in the case of atypical pneumonia, these sounds, so important for diagnosis, are significantly less pronounced. As for diagnostic tools, to confirm atypical pneumonia, a chest X-ray is used, and in more extreme cases, a CT scan. These tests can identify the extent of the inflammation and its specific forms. For example, X-rays can distinguish bacterial from nonbacterial pneumonia.

What does an X-ray show in pneumonia?

In bacterial pneumonia, X-rays reveal a thickening due to the presence of tissue in the lung alveoli. In nonbacterial pneumonia, the interstitial tissues are affected, and the affected area takes on a ground-glass appearance.

Other specific tests

Other specific tests for atypical pneumonias are:

Serological tests to detect specific antibodies against pathogens such as Mycoplasma, Chlamydia or Legionella.
PCR (polymerase chain reaction) to identify Mycoplasma, Chlamydia, or Legionella DNA directly in respiratory secretions.
Blood culture e Gram stain to identify bacteria.

Treatments and cures

Treatment of atypical pneumonia depends on the causative agent. Since these pathogens do not respond to traditional antibiotics, the use of specific antibiotics or antivirals is necessary.

Antibiotics used for atypical pneumonia include:

Macrolides (such as azithromycin) for Mycoplasma pneumoniae and Chlamydia pneumoniae.
Tetracyclines

The decisions always depend on the doctor and the tests performed to identify the specific type of bacteria. Antibiotic therapy generally lasts two weeks and should be combined with rest, a light diet, and careful hydration (at least two liters of water per day). In other cases, antiviral drugs such as oseltamivir, zanamivir, or baloxavir are administered. Acyclovir is used to treat chickenpox pneumonia.

Complications

Cases are rare, but atypical pneumonia, if not treated promptly and effectively, can lead to very serious complications. For example:

Brain and nervous system infections, including encephalitis, meningitis, and myelitis
Hemolytic anemia
Severe damage to lung tissue

Prevention

Prevention for atypical pneumonia begins with personal hygiene and extends to vaccination. These are the most important tips:

Wash your hands well
Do this after coughing or blowing your nose
Not smoking
Vaccines are recommended for the elderly and those in high-risk groups (smokers, diabetics, and patients with cardiovascular disease). The most appropriate vaccine is against pneumococcus, while the hexavalent vaccine (which also protects against whooping cough, measles, rubella, mumps, and chickenpox) is essential for children.

Atypical pneumonia: different forms, treatments, and prevention