Viruses General Introduction To VIRAL DISEASES Diagnosis Treatment with Causative Agents

Viruses General Introduction To VIRAL DISEASES Diagnosis Causative Agents


Viruses General Introduction To VIRAL DISEASES DiagnosisHepatitis Types Causes Symptoms Diagnosis and Treatment. Read more ... »

Viruses Definition

  • Viruses are obligate intracellular parasites which consist of a nucleic acid surrounded by one or more proteins.
  • They can be active, metabolize and replicate only in­side a living cell.
Virusoids red
Viruses Definition and types


  • are nucleic acids dependent on helper vi­rus.


  • are double-stranded RNAs.


  • are abnormal protein molecules which can spread and change the structure of other proteins. They cause diseases like Creutzfeldt-Jakob disease and Mad-cow disease.

Resistance to viral infections

  • is by physical pro­tection by skin and mucus secretions which wash off the virus.
  • Other means of resistance are Interferons – IFN al­pha or beta, IFN y, virus specific antibody, HLA class II, class I, T lymphocytes, antibody type IgM, IgG, and IgA.


  • · Serology, Viral isolation in tissue culture, antivi­ral antibodies, ELISA, Western blot.
  • – Polio virus; Coxsackie virus Hepatitis E virus Rubella virus
  • Dengue, Hepatitis C virus SARS
  • Rabies
  • Parainfluenza; Respiratory syncytial; Mumps;
  • Rubeola or measles. Influenza A, B & C HIV virus
  • Caliciviridae Togaviridae Flaviridae Coronaviridae Rhabdoviridae Pa ra myxovi ridae
  • Orthomyxoviridae Retroviridae

Viruses Types

  • Hepadnaviridae
  • Adenoviridae
  • Herpesviridae
  • Hepatitis B Adenoviruses
  • Herpes simplex;
  • Varicella zoster;
  • Epstein-Barr;
  • Cytomegalovirus Small pox or variola

Viral Disease Causative agents

Influenza A & B re
Influenza A & B


  • 1. Influenza A & B

Respiratory syncytial virus (RSV) ed
Respiratory syncytial virus (RSV)
Respiratory syncytial virus (RSV) ff
Respiratory syncytial virus (RSV)


  • 2. Respiratory syncytial virus (RSV)



  • 3. Varicella

Herpes simplexrf
Herpes simplex


  • 4. Herpes simplex

Herpes zoster df
Herpes zoster


  • 5. Herpes zoster

Chronic hepatitis Be
hepatitis B



  • Ribavirin Acyclovir
  • Acyclovir – Topical, Oral, IV
  • Acyclovir
  • IFN alpha 2b, Lamivudine, Adefovir dipivoxll
  • IFN alpha- 2a or 2b, Pegylated IFN alpha 2a,2b and Ribavirin IFN alpha 2a or alpha 2b