VIRAL DISEASES and its infections /causes of virus disease

VIRAL DISEASES :

COMMON COLD:

(1) occurs due to a group of viruses called rhinoviruses.

(2) These viruses infect the nose and respiratory passage but not lungs. 

(3) common cold is characterised by nasal congestion, and 

discharge, sore throat, hoarseness, cough, headache, 

tiredness, fever,etc.which generally last for 3-7 days. 

(4) infection occurs due to cough or sneezes of an infected person, either inhaled directly or transmitted through contaminated objects like pen, cups, books, computer's keyboard, etc. 

PROTOZOAN DISEASES :

MALARIA:

(1) Malaria is caused by a protozoan, plasmodium sp. 

(plasmodium vivax, plasmodium malariae, and plasmodium falciparum). 

(2) plasmodium falciparum causes most serious kind of malaria, which transfers the sporozoites (infectious form) in human body through the bite. 

Malaria