Which organism is commonly associated with "walking pneumonia"?

The organism commonly associated with "walking pneumonia" is Mycoplasma pneumoniae. Walking pneumonia refers to a milder form of pneumonia that often does not require bed rest or hospitalization, and it is primarily caused by Mycoplasma pneumoniae, which is a type of atypical bacteria. This organism is known for its ability to cause respiratory infections without the more severe symptoms that are typically associated with typical bacterial pneumonia.

Mycoplasma pneumoniae lacks a cell wall, which is unique among bacteria, allowing it to evade some forms of antibiotic treatment that target cell wall synthesis. It typically affects younger populations, often leading to outbreaks in school or college settings. Symptoms of walking pneumonia may include a persistent dry cough, mild fever, and fatigue, which often don’t lead people to seek immediate medical attention, hence the term "walking" pneumonia.

While Streptococcus pneumoniae is a common cause of more typical bacterial pneumonia, especially in older children and adults, it is not associated with the milder, outpatient form of pneumonia. Chlamydia pneumoniae can also cause atypical pneumonia but is less commonly referred to as walking pneumonia compared to Mycoplasma pneumoniae. Escherichia coli is primarily associated with gastrointestinal infections and urinary tract infections