NURSING ANM AND GNM

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NURSING EXAM QUESTIONS

MICROBIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Cultures of a bacterial species were incubated on the shelf of a refrigerator, out on a lab bench top, on the shelf of a 37C incubator, and on the shelf of a 50C incubator. After inoculation, there was no growth at 37C, and 50C, very slight growth out on the bench, and abundant growth at refrigeration. What term could be used for this species?
A
halophile
B
mesophile
C
psychrophile
D
capnophile
Explanation: 

Detailed explanation-1: -Cultures of a bacterial species were incubated on the shelf of a refrigerator, out on a lab bench top, on the shelf of a 37° C incubator and on the shelf of a 50° C incubator. After incubation, there was no growth at 37° C and 50° C, slight growth out on the bench top and abundant growth at refrigeration.

Detailed explanation-2: -Thermophiles are those organisms which grow above 40 °C, and which have optimal growth temperatures between 50 and 55 °C (Gleeson et al., 2013).

Detailed explanation-3: -A bacterium whose optimal growth temperature is 35C would be classified as a thermophile. In both the lag and the stationary phase, there is no net increase or decrease in viable cells.

Detailed explanation-4: -A microorganism that has an optimum growth temperature of 37 degrees but can survive short exposure to high temperatures is called a: thermoduric.

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