8. Sensitivity to an antibiotic using the agar diffusion method is determined by measuring the A) turbidity of the organ

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8 Sensitivity To An Antibiotic Using The Agar Diffusion Method Is Determined By Measuring The A Turbidity Of The Organ 1 (83 KiB) Viewed 68 times

8. Sensitivity to an antibiotic using the agar diffusion method is determined by measuring the A) turbidity of the organisms B) diameter of the zone of no growth C) diameter of the disc D) all of the above E) none of the above = identify 9. Lactobacilli, often used in the production of various cheeses and milk products, retains the crystal violet iodine complex after washing with acetone/alcohol. Therefore, this organism A) will produce colorless colonies of EMB B) will not grow on blood agar C) produces colorless colonies on EMB agar D) will not grow on MacConkey's agar E) none of the above identify 10. Holes in Swiss cheeses and in breads and other bakery products is due to the production of by the process of A) oxygen-phosphorylation B) carbon dioxide - fermentation C) lactic acid anaerobic respiration D) nitrous oxide- nitrogen fixation E) none of the above identify 11. Acid fast bacteria, which include the genus Mycobacterium A) are gram positive cocci B) include the causative agents of leprosy and tuberculosis C) are involved in identify sexually transmitted disease D) all of the above E) none of the above = 12. What do endemic typhus, epidemic typhus, Rocky Mountain spotted fever and a type of pox have in common A) the vector is a mosquito B) the reservoir is rodents C) the cause agent is a Rickettsiae species D) the vector is a flea E) the pathogen is a virus 13. African sleeping sickness is caused by A) Sporothrix schencki B) Sarcinia species C) Schistosoma mansoni D) Toxoplasma gondii E) Trypansoma brucei none of the above = identify 14. Tetanus or lockjaw is usually due to a neurotoxin produced by A) a gram positive cocci-Micrococcus luteus B) an aerobic gram negative bacilli-Bacteroides fragilis C) an anaerobic gram positive bacilli- Clostridium tetani D) a gram negative diplococcus - Neisseria gonorrhea E) a fungi - Cryptococcus neoformans 15. The production of hydrogen sulfide from ferrous salts is most characteristic of A)) Enterobacter species - Escherichia coli B) Serratia - Providencia C) Staphylococcus - Neisseria D) Pseudomonas - Kelbsiella E) Salmonella - Arizona