Question 1

Which of the following is the most common causative agent of uncomplicated urinary tract infections (UTIs) in healthy individuals?

Accepted Answer

Uropathogenic Escherichia coli (UPEC)

Question 2

A patient presents with fever, severe back pain, and nausea. Urinalysis reveals white blood cells and bacteria. Which of the following is the most likely diagnosis?

Accepted Answer

Pyelonephritis

Question 3

Which of the following best describes the life cycle of Chlamydia trachomatis?

Accepted Answer

It alternates between infectious elementary bodies and replicative reticulate bodies within the host cell phagosome.

Question 4

A sexually active woman presents with pelvic pain, vaginal discharge with odor, and bleeding between periods. Which of the following complications is she at greatest risk for if her infection is left untreated?

Accepted Answer

Pelvic inflammatory disease (PID)

Question 5

Which of the following statements about Neisseria gonorrhoeae is CORRECT?

Accepted Answer

It can cause disseminated infections resulting in hemorrhagic pustules and arthritis.

Question 6

A newborn develops conjunctivitis shortly after birth. Which of the following pathogens is most likely responsible, and what is the best preventive measure?

Accepted Answer

Neisseria gonorrhoeae; application of antibiotic eye ointment at birth

Question 7

Which of the following is a distinguishing feature of the secondary stage of syphilis?

Accepted Answer

Skin-wide rash, including palms and soles, and mucous patches

Question 8

A patient is diagnosed with trichomoniasis. Which of the following statements is TRUE regarding this infection?

Accepted Answer

It is caused by a flagellated protozoan and can increase susceptibility to HIV.

Question 9

Which of the following best explains why herpes simplex virus (HSV) infections are considered lifelong?

Accepted Answer

HSV establishes latent infection in peripheral nerves and periodically reactivates.

Question 10

A 22-year-old woman is found to have abnormal cervical cells on a Pap smear. Which of the following pathogens is most likely responsible, and what is the best preventive measure?

Accepted Answer

Human papillomavirus (HPV); vaccination

Question 11

Which of the following is the primary mechanism by which HIV leads to acquired immunodeficiency syndrome (AIDS)?

Accepted Answer

Destruction of CD4+ T cells

Question 12

A patient with a urinary catheter develops fever and bacteremia. Which of the following best explains the increased risk of infection in this scenario?

Accepted Answer

Catheters provide a surface for biofilm formation by bacteria from the GI tract.

Question 13

Which of the following laboratory tests is most appropriate for screening asymptomatic individuals for Chlamydia trachomatis infection?

Accepted Answer

Nucleic Acid Amplification Test (NAAT)

Question 14

A man presents with dysuria, purulent urethral discharge, and testicular pain. Which of the following is the most likely causative agent?

Accepted Answer

Neisseria gonorrhoeae

Question 15

Which of the following best describes the transmission of Treponema pallidum, the causative agent of syphilis?

Accepted Answer

Sexual contact with infectious skin or mucous membrane lesions

Question 16

A patient with untreated syphilis develops neurological symptoms and gummas years after initial infection. Which stage of syphilis is this?

Accepted Answer

Tertiary

Question 17

Which of the following is a recommended strategy to prevent urinary tract infections (UTIs)?

Accepted Answer

Urinating before and after sexual intercourse

Question 18

A woman presents with a fishy, green-yellow, frothy vaginal discharge and genital itching. Which of the following is the most likely diagnosis?

Accepted Answer

Trichomoniasis

Question 19

Which of the following best explains why most cases of Chlamydia trachomatis infection go undiagnosed?

Accepted Answer

Most infections are asymptomatic, leading to lack of diagnosis and treatment.

Question 20

A sexually active man is diagnosed with both Chlamydia trachomatis and Neisseria gonorrhoeae. According to best practices, what should be done regarding his sexual partners?

Accepted Answer

All partners from the past 60 days should be treated.

Urinary and Reproductive System Infections: Microbiology Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards