Viral Diseases

There are many diseases which are caused by virus.Some common diseases in Pakistan are mentioned bellow;

Small pox:

• Caused by DNA enveloped virus pox virus.
• Ancient and common disease throughout the world.
• Raised fluid-filled vesicles are formed on the body which becomes pustules later on and form pitted scars, known as pocks.

Herpes simplex:

• Caused by DNA viruses (Herpes virus).
• Naturally occurring disease of mankind.
• Vascular lesions in the epithelial layers of ectodermal tissues are formed.
• Occurs in mouth, on the lips and other skin sites.

Influenza:

• Caused by RNA viruses (influenza viruses).
• Wide spread disease in man.
• Occure in epidemic form.

Mumps and Measles:

• Large, enveloped, RNA viruse.
• Belong to the group paramyxoviruses.
• Mumps is Highly contagious, and wide spread.
• 60% of adults are immune to it.
• Measles is commonest disease in childhood.
• Develops immunity in its victim.

Polio:

• Poliomylitis, caused by Polio virus.
• Small viruse contain RNA in spherical capsid.
• Occurs mostly in childhood.