Question 31
Which is the following enzyme acts as a spreading factor
Question 32
The ability of a pathogen to spread in ths host tissues after establishing the infection is known as
Question 33
The most important virulence factors are
Question 34
The lethal dose required to kill 50% of the lab animals tested under standard called
Question 35
The virulence of a pathogen is usually measured by
Question 36
Enhancement of virulence is known as
Question 37
Reduction of virulence is known as
Question 38
If a person can be infected by direct contact with infected tissue of another person, it is termed as
Question 39
If the vectors transmit the infection mechanically they are called
Question 40
Disease that effects many people at different countries is termed as