Rhinosporidiosis

(i) Rhinosporidiosis is a chronic granulomatous disease characterised by formation of friable polyps, usually confined to the nose, mouth or eye.

Nasal polyp

(i) Causative agent is Rhinosporidium seeberi.

Rhinosporidium seeberi

(iii) More than 80% cases are reported in India and Sri Lanka.

(iv) The mode of infection is not known but most infections occur in males who have frequent contact with stagnant water or aquatic life.

ORAL MANIFESTATIONS

Oronasopharyngeal lesions appear as soft red polypoid growth which spread to pharynx and larynx.

• These lesions often contain mucoid discharge and are vascular.

LAB DIAGNOSIS

• The fungus has not been cultivated.

• Diagnosis depends on the demonstration of sporangia

•Tissue sections stained with H & E stain show large number of endospores within the sporangia embedded in a stroma of connective tissue and capillaries.

The sporangium (10-200 um) contains thousands of endospores (6-7 µm in diameter)

Source – textbook of microbiology for dental students c p baveja and Google images

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