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  • Biology – Virus – Notes For W.B.C.S. Examination.
    Posted on February 7th, 2019 in General Science
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    Biology – Virus – Notes For W.B.C.S.

    A virus is a micro infectious agent, which is found as parasite in the living cells of other organisms.
    Virus replicates swiftly inside the living cells of other organisms.
    Virus is a Latin term meaning ‘poison’ and other ‘noxious’ liquids.
    Viruses can infect any type of life forms, ranging from animals and plants to microorganisms, including bacteria and archaea.
    The study of viruses is known as virology.
    Virus is first discovered by Dmitri Ivanovsky in 1892.
    Virus has the properties of living as well non-living.
    One of the living properties is – virus has either DNA or RNA (never both).
    One of the non-living properties is – virus has no protoplasm.
    Types of Virus
    Based on parasitic nature, virus is categorized as −

    Animal Virus
    Plant Virus
    Bacterial Virus
    Archaeal Virus
    Viral Diseases in Human Being
    Following are the list of diseases caused by virus in Human beings −

    Chickenpox
    Encephalitis
    Influenza (or Flu)
    Herpes (skin disease)
    Human immunodeficiency virus (HIV/AIDS)
    Human papillomavirus (HPV)
    Infectious mononucleosis
    Mumps (measles and rubella)
    Shingles
    Viral gastroenteritis (stomach flu)
    Viral hepatitis
    Viral meningitis
    Viral pneumonia
    Viral Diseases in Plants
    Following are the list of diseases caused by virus in plants −

    Peanut – Stunt Virus
    Maize – Mosaic Virus
    Lettuce – Mosaic Virus
    Cauliflower – Mosaic Virus
    Sugarcane – Mosaic Virus
    Cucumber – Mosaic Virus
    Tobacco – Mosaic Virus
    Tomato – Twisted leaf disease
    Lady finger – Yellow vein mosaic
    Viral Diseases in Animals
    Following are the list of diseases caused by virus in animals −

    Cow – Herpes (Herpes virus)
    Buffalo – Small pox (Poxverdi orthopox)
    Dog – Rabies (Stereit virus)

     

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