Causative agent of rhinosporidiosis is ?
**Core Concept**
Rhinosporidiosis is a chronic granulomatous infection characterized by the presence of rhinosporidium seeberi, a protozoan parasite. The disease primarily affects the mucous membranes of the nose, conjunctiva, and other parts of the body. The causative agent is a unique organism that exhibits both fungal and protozoan characteristics.
**Why the Correct Answer is Right**
Rhinosporidium seeberi is a dimorphic organism that exists in both aquatic and terrestrial environments. It infects humans through direct contact with contaminated water or soil. The organism multiplies within the host's tissues, leading to the formation of granulomatous lesions. The characteristic histopathological feature of rhinosporidiosis is the presence of numerous sporangia, each containing numerous spores.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not mention the correct causative agent of rhinosporidiosis. The disease is not caused by a bacterium.
**Option B:** This option is incorrect because it is not a known causative agent of rhinosporidiosis. The organism responsible for the disease has been identified as rhinosporidium seeberi.
**Option C:** This option is incorrect because it is not a causative agent of rhinosporidiosis. The disease is not caused by a virus.
**Clinical Pearl / High-Yield Fact**
Rhinosporidiosis is often misdiagnosed as a benign growth or a fungal infection. However, it is a chronic granulomatous infection that requires prompt medical attention to prevent further complications.
**Correct Answer:** C. Rhinosporidium seeberi