Bacter - Study guides, Class notes & Summaries

MMBIO 261 Bacteria Final Questions With Complete Solutions

In suspected cases of brucellosis, the optimal specimen to be collected for the isolation of the etiologic agent is A. Blood B. Urine C. Cerebrospinal fluid D. Nasopharyngeal exudates correct answers A. The etiologic agents of brucellosis are the brucellae, which are small, nonmotile, gramnegative coccobacilli that are facultative intracellular parasites. Isolation of these organisms is difficult. In suspected cases, which are generally job related, multiple blood cultures are recommended f...

Why are bacteria an excellent tool for genetic research? -Grow extremely quickly -Very easy to isolate one species or strain of bacteria, typically through the selection of antibiotic-resistant strains -Bacteria can be grown in almost any laboratory, typically with little risk, and their source of nourishment is extremely inexpensive 2. Spontaneous mutation Refers to the process by which bacteria undergo random mutations, some of which may be advantageous to survival in an otherwise h...

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