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Signs and Symptoms of Ebola Virus Disease 5/5 (2)

Signs and Symptoms of Ebola Virus Disease

Signs and Symptoms of Ebola Virus Disease Symptoms may appear anywhere from 2 to 21 days after exposure to Ebola, but the average is 8 to 10 days. Ebola Zaire kills people quickly, typically 7 to 14 days after symptoms appear. A person can have the virus but not show any symptoms for as long […]

Structure of Ebola Virus 4/5 (21)

Ebola Virus Structure

  Structure of Ebola Virus Ebola Virus are generally approximately 80 nm in diameter, 970 nm long. They are cylindrical/tubular, and contain viral envelope, matrix, and nucleocapsid components. The virus generally appears in a long, filamentous form, but it can also be “U-shaped,” in the shape of a “6” (the “shepherd’s crook” appearance), or even […]

Genome of Ebola Virus 4.33/5 (3)

Ebola Virus Genome

Genome of Ebola Virus Ebola Virus have a negative-sense, non-segmented single stranded linear RNA genome about 18-19 kb in size. The 3′ terminus is not polyadenylated and the 5′ end is not capped. It contains approximately 19,000 base pairs. It encodes seven structural proteins: nucleoprotein (NP), polymerase cofactor (VP35), (VP40), GP, transcription activator (VP30), VP24, […]

Cultural Characteristics of Streptococcus 4/5 (28)

Beta-hemolysis on blood agar (Streptococcus pyogenes)

Cultural Characteristics of Streptococcus 1. They are aerobic and facultative anaerobes. 2. They grow best at 37 degree Celsius. 3. Group D grow well at between 10 degree Celsius and 45 degree Celsius. 4. Growth is poor on solid media or broth. 5. Grow well in media containing blood and sugar ( fermentable carbohydrates) and […]

Habitat of Helicobacter pylori 2.92/5 (12)

Helicobacter pylori in stomach

Habitat of Helicobacter pylori 1. The natural habitat of H. pylori species is gastrointestinal tract of mammals and birds. 2. H. pylori was first identified in human intestinal biopsies in 1983. 3. They inhabit the surface of stomach mucosa. 4. Majority of H. pylori are located adjacent to surface and pit gastric epithelial cells. 5. […]

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