Category: medical

Rickettsia: Introduction, Morphology, Pathogenesis, Complications, Laboratory Diagnosis, Treatment and Prevention

Rickettsia: Howard Taylor Ricketts (1909): Isolated Rickettsia from a patient suffering from Rocky mountain spotted fever, late on he died while working with this organism. Obligate intracellular parasite  and Gram negative pleomorphic rods which are poorly stained with Gram stain but properly  stained with Giemsa or Gimenez stains. Introduction of Rickettsia Howard Taylor Ricketts (1909): Isolated Rickettsia from a...

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Histoplasma : Introduction, Morphology,Life Cycle, Pathogenesis, Laboratory Diagnosis, Treatment and Prevention

Histoplasma capsulatum was discovered by Pathologist, Samuel Taylor Darling in 1906. It is  a causative agent of histoplasmosis ( systemic disease) sometimes called Darling’s disease, in honor of discoverer. It a domorphic fungus and thus it grows as filamentous molds as saprobes and in culture at 25°C; while in humans or culture at 37 °C , it transforms to a unicellular morphology ( yeast cells Introduction of Histoplasma capsulatum Histoplasma capsulatum was discovered by Pathologist,...

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Mycoplasma: Introduction, Characteristics, Pathogenecity, Lab Diagnosis and Treatment

Mycoplasma: A cell wall deficient organism was isolated by Nocard and Roux in 1998, from a cattle suffering from pleuropneumonia. The organism was filterable through bacteria  stopping filter and highly pleomorphic. Because of their resemblance to the organisms responsible for pneumonia in the cattle, for the many years this organism was called Pleuropneumonia like organism (PPLO). Since organism are seen like fungus in the form of branching filaments, the name given today for this organism is Mycoplasma Introduction of Mycoplasma A cell wall deficient organism was isolated...

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