Question

Chances of developing a disease are increased due to

• A. Infective dose
• B. Invasiveness
• C. Toxigenicity
• D. All of the above

Answer 1

Answer: (D)

All of the above

The number of pathogens that are required to infect a host is termed as an infective dose. The infective dose will depend on the mode of action of the molecules that pathogens use to facilitate their infection. An invasive disease is one that spreads to surrounding tissues. Persons with skin lesions such as cuts, chicken pox, surgical wounds have a higher risk for invasive disease. In susceptible individuals, toxigenic strains of pathogens can cause disease by multiplying and secreting toxins in the host's body.

Thus, the correct answer is option D.