Which of the following organisms can cause gastrointestinal symptoms without infecting the affected individual? A. Salmonella...

Which of the following organisms can cause gastrointestinal symptoms without infecting the affected individual?

A. Salmonella enterica

B. Staphylococcus aureus

C. Giardia lamblia

D. Shigella

E. Legionella pneumophila

A reservoir of infection...

A.	is the pathogen causing the disease
	B.	is the mechanism by which the disease is transmitted
	C.	is a virulence factor
	D.	is a vector
	E.	none of the above

Expert Solution

1. Answer : B. Staphylococcus aureus

The organism Staphylococcus aureus can cause gastrointestinal symptoms without infecting the affected individual.

2. Answer : E. None of the above.

A reservoir is a living or non living site where a pathogen resides for a long period of time and multiplies.

A pathogen is an infectious organism which causes disease. Reservoir is the residing site of pathogens, so option A is wrong.

A reservoir is not a mechanism of transmission of disease. Mechanism of transmission of disease includes direct person to person contact transmission and sexually transmitted diseases. Hence option B is also incorrect.

Certain molecules or factors produced by microorganisms like bacteria and viruses, which produces disease are known as virulence factors. Hence C is incorrect.

An agent which carries an infectious pathogens into other organisms which infects the other one are known as vectors. Hence D is also incorrect.

gladiator answered 2 years ago

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