Varicella Zoster Virus

Varicella Zoster Virus

Varicella Zoster Virus Structure of Varicella Zoster Virus Image Source: Creative Diagnostics Varicella-zoster virus (VZV) is an alphaherpesvirus that is in the same subfamily as herpes simplex virus (HSV) 1 and 2. VZV is a member of varicellovirus genus. The virion is spherical in shape with icosahedral symmetry measuring 159-200nm. The icosahedral protein capsid with … Read moreVaricella Zoster Virus

Mutation- Causes, Mechanisms, Agents and Significance

Mutation- Causes, Mechanisms, Agents and Significance

Mutation- Causes, Mechanisms, Agents and Significance Mutation is a process that produces a gene or chromosome that differs from the wild type (arbitrary standard for what “normal” is for an organism). It is most commonly defined as a spontaneous permanent change in a gene or chromosome which usually produces a detectable effect in the organism … Read moreMutation- Causes, Mechanisms, Agents and Significance

Hanta Virus

Hanta Virus

Hanta Virus Structure of Hanta Virus Source: Viral Zone Hanta virus falls under the Bunyaviridae family. The virion displays round or pleomorphic morphology with a diameter of roughly 120-160 nm. The virus capsid is enveloped by a single layer envelope. The envelope surrounds three nucleocapsids and has surface projections. Surface projections are distinctive spikes which are … Read moreHanta Virus

Polio Virus

Polio Virus

Polio Virus Structure of Polio Virus Poliovirus is a member of a family of viruses called the Picornaviridae. Virions are spherical in shape with a diameter of about 27nm. The particles are simple in that they are composed of a protein shell surrounding the naked RNA genome. The genome is monopartite, linear ssRNA(+) genome of 7.2-8.5 kb, … Read morePolio Virus

Japanese Encephalitis (JE) Virus

Japanese Encephalitis (JE) Virus

Japanese Encephalitis (JE) Virus Structure of Japanese Encephalitis (JE) Virus Japanese encephalitis (JE) virus falls under the family Flaviviridae. The particles appear to be spherical, 50 nm in diameter, containing an electron dense core (about 30 nm diameter) surrounded by a lipid bilayer. Mature virions sediment between 170 and 210S, have a buoyant density of 1.19 … Read moreJapanese Encephalitis (JE) Virus

Differences Between Bacteria and Virus

Differences Between Bacteria and Virus

Differences Between Bacteria and Virus Here are some differences: S.N. Character Bacteria Virus 1 Cell type Prokaryotic cells Acellular 2 Number of cells Single celled No cell 3 Size Larger than viruses (0.3-2 μ) Minute (0.02-0.3 μ) 4 Microscopy Visible under Light Microscope. Visible only under Electron Microscope. 5 Shape  Common bacterial cell shapes include cocci (spherical), … Read moreDifferences Between Bacteria and Virus

Norwalk Virus (Norovirus)

Structure and Genome of Norwalk Virus

Structure of Norwalk Virus (Norovirus) The virus is non-enveloped, round, 27-nm particles with a ‘ragged’ outer edge but lacking a definite surface structure. It has buoyant density of 1.33–1.41 g/cm3, an inability to propagate in vitro. Characteristically, Norwalk virus possess a single capsid protein. The genome is a nonsegmented, single-stranded, positive polarity RNA genome. Ten prominent … Read moreNorwalk Virus (Norovirus)

Ebola Virus

Ebola Virus- Structure, Genome, Epidemiology, Transmission, Replication, Pathogenesis, Clinical Manifestation, Lab Diagnosis, Treatment, Prevention and Control

Structure of Ebola Virus It falls under the Filoviridae family. The virion is filamentous, enveloped measuring 800 nm length and 80 nm in diameter. It comprises of negative sense, single stranded RNA genome. Structural proteins associated with the nucleocapsid are the nucleoprotein (NP), VP30, VP35, and the polymerase (L) protein. Membrane-associated proteins are the matrix protein … Read moreEbola Virus

Rota Virus

Rota Virus- Structure, Genome, Epidemiology, Replication, Pathogenesis, Clinical Manifestation, Lab Diagnosis, Treatment, Vaccination, Prevention and Control

Structure of Rota Virus The name rotavirus is derived from the Latin word rota, meaning “wheel,” which refers to the virion’s appearance in negative-stained electron micrographs. Rotavirus fall under Reoviridae family and subfamily Sedoreovirinae, which appear more smooth, lacking the large surface projections. The virion has icosahedral symmetry and is triple layered capsid lacking an envelope … Read moreRota Virus