The protozoan found in colon of human is
P. vivax
A. egypti
E. coli
All of these
Non-specific host defence that exists prior to the exposure to an antigen is called
In the given flow chart, the replication of retrovirus in a host cell is shown. Observe it carefully and fill up the blank $A, B$ and $C$
''Maintenance of personal and public hygiene is necessary for prevention and control of many infectious diseases''. Justify the statement giving suitable examples.
Which of the following disease is due to an allergic reaction