Monday, June 26, 2017

Rhinosporidium seeberi

Rhinosporidium seeberi

For centuries...this organism has been at the very center of controversy and confusion, as regards to it's taxonomy.

We know that this is the causative agent of Rhinosporidiosis....which presents with strawberry polyps( red polyps with white dots) most commonly in the nose...but can also be seen in the oral cavity, eye and the genitalia. This disease is common in the costal areas and the main clinical feature is bleeding. Treatment is by cautery excision along with medical therapy of dapsone.

We now take a look at it's classification. For centuries... It had been wrongly classified as a fungus, a protist, cyanobacteria and even as a carbohydrate waste product.
Recent research employed the use of Polymerase Chain Reaction and Fluorescent in situ hybridization techniques to place R.seeberi in a group of organisms at the common divergence of protists and fungi known as the DRIP clade or Ichthyosporea and more correctly as the Mesomycetozoa. This group contains Dermocystidium, Rosette agent,  Ichthyophonus and Psorospermium of which only R.seeberi is known to infect humans.

Mithil Jagannath.
Medicowesome 2017.

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