Microorganisms found in lung abscess is / are:
**Core Concept**
A lung abscess is a type of lung infection characterized by the formation of a localized collection of pus within the lung tissue. The causative microorganisms typically include a mix of aerobic and anaerobic bacteria, which thrive in the low-oxygen environment of the abscess.
**Why the Correct Answer is Right**
The most common microorganisms found in lung abscesses are anaerobic bacteria, such as Peptostreptococcus, Fusobacterium, and Bacteroides, which are well adapted to survive in low-oxygen environments. These bacteria can be introduced to the lung through aspiration of oral or gastrointestinal contents. The anaerobic bacteria often co-exist with aerobic bacteria, such as Streptococcus pneumoniae and Klebsiella pneumoniae, which can also contribute to the development of lung abscesses.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided.
**Option B:** While certain fungal infections can cause lung abscesses, they are not the primary cause.
**Option C:** Viral infections are not typically associated with lung abscesses.
**Clinical Pearl / High-Yield Fact**
In the management of lung abscesses, it is essential to consider both aerobic and anaerobic coverage in the choice of antibiotics, as the causative microorganisms often include a mix of both.
**Correct Answer: C. Bacteria.