The hepatitis B virus is a DNA virus belonging to the Hepadnaviridae family causing hepatitis B in humans. Hepatitis B is a viral infection that attacks the liver and can cause both acute and chronic disease. Group: Group VII (dsDNA-RT) Family: Hepadnaviridae Genus: Orthohepadnavirus Species: Hepatitis B virus Structure of Hepatitis B Virus Three …
Zika Virus (ZIKV) is mosquito-borne emerging flavivirus which was first identified in Zika Forest of Uganda in 1947 in rhesus monkeys. It was later identified in humans in 1968 for the first time in Nigeria. Different outbreaks of Zika virus disease have been recorded in Africa, the Americas, Asia and the Pacific. Its infection is caused by the bite of …
Read moreZika Virus- Structure, Genome, Symptoms, Transmission, Pathogenesis, Diagnosis
S.N Characteristics Chickenpox Smallpox 1 Causative Agent Varicella Zoster Virus (Herpes Virus) Variola virus (Pox Virus) 2 Incubation period 14-21 days 7-17 days 3 Severity Chickenpox is less deadly comparing to small pox. Smallpox is deadly severe comparing to chicken pox. 4 Lesions Lesions first appear on the face or trunk. Lesions first appear in …
Influenza Virus are remarkable because of the frequent antigenic change that occurs in HA (hemagglutinin) or NA (neuraminidase). The two surface antigens of influenza undergo antigenic variation independent of each other. They are Antigenic Shift and Antigenic Drift. Some of the Differences Between Antigenic Shift and Antigenic Drift are as follows: S.N. Antigenic Shift Antigenic …
Read moreDifferences Between Antigenic Shift and Antigenic Drift
Viruses are obligate intracellular parasites so they depend on host for their survival. They cannot be grown in non-living culture media or on agar plates alone, they must require living cells to support their replication. The primary purpose of virus cultivation is: To isolate and identify viruses in clinical samples. To do research on viral …
Ebola Virus do not replicate through any kind of cell division; rather, they use a combination of host and virally encoded enzymes, alongside host cell structures, to produce multiple copies of viruses. These then self-assemble into viral macromolecular structures in the host cell. The virus completes a set of steps when infecting each individual cell. …
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 as 3 weeks. People who survive can …
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 circular. They have a virally …