The pathogenecity of an organism: A) Is influenced by genetic factors inhereted

Question

The pathogenecity of an organism:

A) Is influenced by genetic factors inhereted to the microorganism
B) Can be altered by changes in host resistance
C) Is associated with virulence factors
D) A and B are correct
E) All are correct

2) Staph aureus toxins are:
A) Neurotoxins
B) Endotoxins
C) Ectotoxins
D) Superantigen tocins

3) The complement cascade:
A) Is a series of interacting proteins
B) Is activated by classical, alternate or lectin binding pathways
C) Is involved in cell lysis
D) A, B and C are correct
E) None of the above

Explanation / Answer

1) Pathogenicity is the ability of an organism to cause disease. It is a genetic component of the pathogen and it is determined by the virulence factors of the microorganism. Host resistance also defines the pathogenecity of a microorganism. Therefore E is the correct option as all the answers are correct.

2) Staph aureus causes release of superantigen toxins. D is the correct option

3) D is the correct option as complement cascade involves the interaction of interacting complement proteins, it is activated by classical, alternate or lectin binding pathways to finally create pores in the cell membrane of the pathogen and it causes cell lysis.

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