In mycoplasma pneumonia, following are seen except
**Core Concept**
Mycoplasma pneumonia is a type of atypical bacterial infection caused by Mycoplasma pneumoniae, which affects the respiratory system. The disease is characterized by an inflammatory response in the lungs, leading to symptoms such as cough, fever, and shortness of breath. The pathogenesis involves the interaction between the bacteria and the host's immune system.
**Why the Correct Answer is Right**
Mycoplasma pneumoniae lacks a cell wall, which makes it resistant to beta-lactam antibiotics such as penicillin. However, the bacteria are susceptible to macrolides, fluoroquinolones, and tetracyclines, which can inhibit protein synthesis or DNA replication. The inflammation in mycoplasma pneumonia is mediated by the release of cytokines and chemokines, which attract immune cells to the site of infection.
**Why Each Wrong Option is Incorrect**
**Option A:** Interstitial infiltrates on chest X-ray are a common finding in mycoplasma pneumonia, so this option is incorrect.
**Option B:** Mycoplasma pneumoniae can cause extrapulmonary manifestations such as cold agglutinins, so this option is incorrect.
**Option C:** This option is the correct answer because mycoplasma pneumonia is typically not associated with cavitation, which is a characteristic feature of other types of pneumonia, such as tuberculosis or staphylococcal pneumonia.
**Clinical Pearl / High-Yield Fact**
A key feature of mycoplasma pneumonia is the presence of cold agglutinins, which are antibodies that can cause hemolysis in patients with underlying hemolytic anemia.
**Correct Answer:** C.