True statement about ASOM is:
**Core Concept**
Acute Suppurative Otitis Media (ASOM) is a common middle ear infection characterized by the accumulation of pus in the middle ear, often resulting from an upper respiratory tract infection. The pathogenesis of ASOM involves the invasion of bacteria, usually Streptococcus pneumoniae, Haemophilus influenzae, or Moraxella catarrhalis, into the middle ear through the Eustachian tube.
**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of ASOM. In ASOM, the Eustachian tube dysfunction leads to the accumulation of fluid in the middle ear, creating an ideal environment for bacterial growth. The bacteria then multiply and produce toxins, leading to inflammation and the formation of pus. The correct answer is related to the fact that ASOM is often caused by bacterial infection.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because ASOM is not typically caused by viral infections. While viruses can cause upper respiratory tract infections that may lead to ASOM, the condition itself is usually bacterial in origin.
**Option B:** This option is incorrect because ASOM is not characterized by the presence of a foreign body in the ear. Foreign bodies may cause a different type of ear infection, but ASOM is a specific condition related to bacterial infection and Eustachian tube dysfunction.
**Option C:** This option is incorrect because ASOM is not typically associated with a decrease in middle ear pressure. In fact, ASOM is often associated with an increase in middle ear pressure due to the accumulation of fluid and pus.
**Clinical Pearl / High-Yield Fact**
It's essential to note that ASOM can lead to complications such as mastoiditis, meningitis, and hearing loss if left untreated or undertreated. Therefore, prompt diagnosis and treatment are crucial to prevent these complications.
**Correct Answer:** C.