microbiology chapter 11 test bank

Questions 80

ATI RN

ATI RN Test Bank

microbiology chapter 11 test bank Questions

Question 1 of 5

A vaginal yeast infection is typically caused by:

Correct Answer: B

Rationale: The correct answer is B: Candida albicans. Candida albicans is the most common cause of vaginal yeast infections due to its ability to overgrow in warm, moist environments like the vagina. It is a type of fungus that naturally resides in the body, but can cause infection when its growth is not regulated. Histoplasma capsulatum (A) causes a lung infection, Aspergillus niger (C) causes fungal sinusitis, and Saccharomyces cerevisiae (D) is a type of yeast used in baking and brewing, not typically associated with vaginal infections.

Question 2 of 5

Which is the main mechanism of passing the infection with Listeria monocytogenes from man to man:

Correct Answer: C

Rationale: The correct answer is C, transplacental mechanism. Listeria monocytogenes can cross the placenta, infecting the fetus during pregnancy. This mechanism allows the bacteria to be transmitted from mother to baby in utero. Alimentary mechanism (A) involves ingestion of contaminated food, not direct transfer between individuals. Transmission (B) is a broad term that doesn't specify the specific route of Listeria transmission. Physical contact (D) is not a common mode of Listeria transmission compared to transplacental transmission in the case of maternal-fetal infection.

Question 3 of 5

For shigella is true:

Correct Answer: C

Rationale: Step-by-step rationale: 1. Shigella is a nonmotile bacterium. 2. This lack of motility is a key characteristic used to differentiate it from other enteric bacteria. 3. Nonmotile nature of Shigella helps it to cause infections by invading the intestinal epithelial cells. 4. Therefore, choice C is correct as Shigella is indeed nonmotile. Summary: A: Incorrect - Shigella does not produce hydrogen sulfide. B: Incorrect - Shigella does not ferment lactose. D: Incorrect - Shigella is not mannitol positive.

Question 4 of 5

What drug is more advisable for the patient with amebic dysentery?

Correct Answer: A

Rationale: The correct answer is A: Metronidazole. Metronidazole is the drug of choice for amebic dysentery as it effectively targets the protozoa causing the infection. It has good tissue penetration and high efficacy against Entamoeba histolytica. Pyrantel (B) is used for nematode infections, not amebiasis. Levamisole (C) is an anthelmintic for roundworms and not effective against amoebas. Bicillin-5 (D) is a penicillin antibiotic, which is not indicated for treating amebic dysentery.

Question 5 of 5

The tool of choice to observe living microorganisms is the

Correct Answer: B

Rationale: The correct answer is B: phase-contrast microscope. This type of microscope is ideal for observing living microorganisms because it enhances the contrast of transparent specimens without the need for staining or fixing, allowing for clear visualization of internal structures and movements. Bright-field microscopes (A) are suitable for observing fixed and stained specimens, not living organisms. Fluorescence microscopes (C) are used to detect specific cellular components tagged with fluorescent markers, not ideal for observing overall morphology. Electron microscopes (D) use electron beams and are best for viewing detailed structures at high magnification, but are not suitable for observing living organisms due to the need for vacuum conditions.

Similar Questions

Join Our Community Today!

Join Over 10,000+ nursing students using Nurselytic. Access Comprehensive study Guides curriculum for ATI-RN and 3000+ practice questions to help you pass your ATI-RN exam.

Call to Action Image