Which among the following is the drug of choice in Mycoplasma infection?
**Core Concept**
Mycoplasma infections are caused by bacteria that lack a cell wall, making them resistant to beta-lactam antibiotics. The treatment of choice involves targeting the bacterial cell membrane and DNA replication.
**Why the Correct Answer is Right**
The drug of choice for Mycoplasma infections is a macrolide antibiotic, specifically erythromycin. Macrolides work by inhibiting protein synthesis in bacteria by binding to the 50S ribosomal subunit. This prevents the formation of the 50S initiation complex and ultimately leads to the inhibition of protein synthesis. Erythromycin is a broad-spectrum antibiotic that is effective against a wide range of bacterial infections, including those caused by Mycoplasma.
**Why Each Wrong Option is Incorrect**
**Option A:** Tetracyclines are not the drug of choice for Mycoplasma infections because they are not effective against these bacteria due to the presence of a ribosomal protection protein that prevents tetracyclines from binding to the ribosome.
**Option B:** Beta-lactam antibiotics, such as penicillin, are not effective against Mycoplasma infections because these bacteria lack a cell wall, making them resistant to beta-lactam antibiotics.
**Option C:** Aminoglycosides, such as gentamicin, are not the drug of choice for Mycoplasma infections because they are not effective against these bacteria and can also cause nephrotoxicity and ototoxicity.
**Clinical Pearl / High-Yield Fact**
Mycoplasma pneumoniae is a common cause of community-acquired pneumonia, particularly in young adults and children. It is often associated with a self-limiting illness, but can also cause severe disease, especially in immunocompromised individuals.
**Correct Answer:** C.