When usinga plate count to follow the growth of an organism that forms a capsule

Question

When usinga plate count to follow the growth of an organism that forms a capsule, you expecttosee: A) an Increase in the viable cell count above that of a non-encapsulated organlsm a death rate that sslower than anon-encapsulated organism C) a total cell count that is higher than a non-encapsulated organism D) no difference between an organism with out without a capsule Incorrect answer: B An of the following Infections would be more likely to occurin hunterswho dress their game with their bare hands than in city dwellers who buy thelr meat at Rouse's EXCEPT for: tularemia B) plague undulant fever Salmonellosis E) shlgellosls Incorrect answers: Cand D The lag phase of growth is characterized by: consistent generation time B) predictable staining characteristics C) maximum rate of growth D) logarithmic ncrease in numbers E) adaptation to fresh media X all of the above Incorrect answer: A and F Which of the following correctly describes a tubercle: A) It is also called a granuloma tuberculosis infections B It occurs in it occurs in Staphylococcus infections D) It occurs in systemic fungal infections results in the rapid death ofthe invading organisms FOA XNA, C, and D B, and E B, and D G and H Incorrect answers: Bodies of water in Louisiana are source of infections with all ExCEPT which ofthe following Leptospira icterohemorrhagia D) Rickettsia typhi Incorrect answers: Band C

Explanation / Answer

1. There would be an increase in total cell count of the organism other than that of non-capsulated ones. The non-capsulated organisms grow relatively slower than the other organism which does not form capsules.

2. The answer is Tularemia. This disease is caused by Francisella tularensis, a gram-negative coccobacillus. The most common mode of transmission is by direct contact with contaminated animals or material or by ingestion of the poorly cooked flesh of infected animals.

3. The lag phase is usually when the bacteria adapt to the conditions in which it is present.

4. Tubercle is a small nodular lesion in the lungs or other tissue which is characteristic of tuberculosis.

5. Bodies of water in Louisiana are not infected with Vibrio cholera

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