Structure of Virus

Viruses are composed of a central core of nucleic acid surrounded by a capsid, which is made up of capsomers. Viruses exhibit characteristic symmetry:

  1. Icosahedral in the case of spherical viruses
  2. Helical in the case of rod-shaped viruses, and
  3. Complex in the case of the miscellaneous group

In some viruses, the nucleocapsid is covered by an outer-membrane-like structure called the envelope, which is made up of lipoproteins and conceals this symmetry. Enveloped viruses are sensitive to lipid solvents such as ether and chloroform.

Non-enveloped viruses are referred to as naked viruses. Such viruses are not affected by lipid solvents.

Virus: Structural Properties and Diseases

Virus: Structural Properties and Diseases

Viruses are genetic elements that cannot replicate independently of a living host cell.

SARS-CoV-2:  Properties, Transmission, and Prevention

SARS-CoV-2: Properties, Transmission, and Prevention

SARS-CoV-2, a SS-RNA virus is a member of the Coronaviridae family that causes COVID-19 pandemic.

Japanese Encephalitis (JE) Virus: Life Cycle, Pathogenesis, Diagnosis

Japanese Encephalitis (JE) Virus: Life Cycle, Pathogenesis, Diagnosis

Japanese Encephalitis (JE) virus is a leading cause of vaccine-preventable encephalitis.

Measles virus: Structure, Pathogenesis, Lab Diagnosis

Measles virus: Structure, Pathogenesis, Lab Diagnosis

Measles virus is a member of the genus Morbillivirus of the family Paramyxoviridae. Measles is usually a disease of childhood (3-10 years).

How does the influenza virus change so fast?

How does the influenza virus change so fast?

Influenza virus has two ways to change — one slow and one fast. The slow change is known as drift and the fast change is called shift.

Why does influenza come back year after year?

Why does influenza come back year after year?

Influenza virus changes every time it reproduces, generating progeny that are ever so slightly different from the parent.

Structure of Human Immunodeficiency Virus (HIV)

Structure of Human Immunodeficiency Virus (HIV)

Influenza (flu) Virus: Classification, Structure, and Diagnosis

Influenza (flu) Virus: Classification, Structure, and Diagnosis

Influenza (flu) is caused by influenza viruses, a member of the orthomyxovirus family. There are three types of influenza (flu) viruses: A, B, and C.

Rabies Virus: Structure, Pathogenesis, and Lab Diagnosis

Rabies Virus: Structure, Pathogenesis, and Lab Diagnosis

Rabies is a viral disease most often transmitted through the bite of a rabid animal. Rabies virus is a negative-sense, non-segmented, SS RNA virus.

Herpes Simplex Virus (HSV): Structure, Clinical Feature, Lab Diagnosis

Herpes Simplex Virus (HSV): Structure, Clinical Feature, Lab Diagnosis