Which of the following is known as Preisz Nocard bacillus
**Core Concept**
The Preisz Nocard bacillus is a type of bacteria associated with a specific infection. It belongs to the genus Nocardia, which is a group of aerobic, Gram-positive, catalase-positive rods.
**Why the Correct Answer is Right**
The Preisz Nocard bacillus is indeed known as Nocardia asteroides, a species of bacteria that causes nocardiosis, a type of opportunistic infection that primarily affects immunocompromised individuals. This bacterium is typically found in soil and can cause lung infections, as well as disseminated disease in people with weakened immune systems. Nocardia asteroides is characterized by its ability to produce catalase, which distinguishes it from other bacteria.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it is not related to the Preisz Nocard bacillus.
* **Option B:** This option is incorrect because it refers to a different type of bacteria.
* **Option C:** This option is incorrect because it is not associated with the Preisz Nocard bacillus.
**Clinical Pearl / High-Yield Fact**
Nocardiosis should be considered in the differential diagnosis of opportunistic infections in immunocompromised patients, particularly those with HIV/AIDS or undergoing chemotherapy. The disease often presents as a lung infection, but can disseminate to other organs, such as the brain and skin.
**Correct Answer:** D. Nocardia asteroides