All members of the seven families for whom Mary Mallon prepared meals developed typhoid fever. Mary did not get sick. This is an example of __________.

A) a sporadic disease
B) an opportunistic infection
C) a nosocomial infection
D) a carrier borne infection


Ans: D) a carrier borne infection

Biology & Microbiology

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The breakdown of a joint's cartilage lining and the formation of bone spurs accompany which

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On a lab bench, there are four balloons filled with identical volumes of different salt solutions: 0% (balloon

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Biology & Microbiology

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