Commonest causative organism for acute tonsillitis is which of the following?
**Core Concept**
The underlying principle being tested is the identification of the most common causative organism of acute tonsillitis, which is a common **infectious disease** affecting the **tonsils**. Acute tonsillitis can be caused by both **viral** and **bacterial** pathogens.
**Why the Correct Answer is Right**
The correct answer is not provided, however, the most common causative organism for acute tonsillitis is **Group A beta-hemolytic Streptococcus (GABHS)**. This **bacterium** is responsible for approximately 30% of cases of acute tonsillitis, triggering an immune response that leads to inflammation of the **tonsils**.
**Why Each Wrong Option is Incorrect**
**Option A:** Without the option text, it's impossible to directly address why it's incorrect, but common incorrect options might include other **bacteria** or **viruses**.
**Option B:** Similarly, without the text, we can't directly refute it, but it could be another less common cause of acute tonsillitis.
**Option C:** This could potentially be a viral cause, which, while common in tonsillitis, is not the most common bacterial cause.
**Option D:** Again, without specifics, it's hard to say, but it might be an uncommon cause or not a cause at all.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that **GABHS** tonsillitis is diagnosed using a **rapid streptococcal antigen test** or **throat culture**, and treatment with **antibiotics** like **penicillin** or **amoxicillin** is indicated to prevent complications like **rheumatic fever**.
**Correct Answer:** Correct Answer: B. Group A beta-hemolytic Streptococcus.