Treponema pallidum – An Overview

Treponema pallidum

Classification Class- Spirochaetes Order- Spirochaetales Family- Spirochaetaceae Genus- Treponema Species- Treponema pallidum Image Source: Russell Publishing Limited. Morphology of Treponema pallidum Treponemes are thin, delicate, helically coiled, corkscrew-shaped organisms. They are microaerophilic and actively motile. They are measures about 10 to 14 micrometers long and 0.1 to 0.2 micrometer wide. They have …

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Pathogenicity and Clinical manifestation of Salmonella Typhi

Pathogenicity and Clinical manifestation of Salmonella Typhi

Pathogenesis of Salmonella Typhi (Enteric fever/Typhoid fever) Enteric fever is usually caused by strains of Salmonella Typhi & Paratyphi A, B, and C. Enteric fever is generally characterized by infection of reticuloendothelial system & intestinal lymphoid tissue accompanied by sustained fever & bacteremia. The transmission occurs via oral route usually with contaminated …

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Diagnosis of Novel Coronavirus, SARS-CoV-2 (COVID-19)

Diagnosis of Novel Coronavirus (2019-nCoV)

Introduction Lab diagnosis refers to the identification, examination & confirmation of pathogens in the lab. The diagnosis of virus infection can be established in several ways, often used together, namely: Detection of virus particles, viral antigens or viral nucleic acids in specimens taken from the appropriate site. Culture of infectious viruses from …

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Buffer Solutions

Buffer Solutions

Buffer Solutions DEFINITION A buffer is an aqueous solution consisting of a mixture of a weak acid & its salt or a weak base & its salt that resist a change in pH on the addition of either acid or base. Note:- A lot of biological & chemical reactions need a constant …

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