Question 1

Which of the following mechanisms is NOT a protective feature of the urinary system against pathogens?

Accepted Answer

Presence of a thick mucus layer in the ureters

Question 2

A 25-year-old woman presents with painful urination and a positive leukocyte esterase (LE) test. Which organism is most likely responsible for her condition?

Accepted Answer

Escherichia coli

Question 3

Which of the following best explains why women are more susceptible to cystitis than men?

Accepted Answer

Women have a shorter urethra

Question 4

A patient develops pyelonephritis after a prolonged urinary tract infection. What is a potential long-term complication if this condition becomes chronic?

Accepted Answer

Scar tissue in the kidneys leading to life-threatening consequences

Question 5

Which of the following organisms is part of the normal vaginal microbiota and helps maintain an acidic environment?

Accepted Answer

Lactobacilli

Question 6

A hospital is experiencing an increase in urinary tract infections among patients. Which piece of equipment is most likely contributing to this rise?

Accepted Answer

Urinary catheters

Question 7

Which of the following is the most common causative agent of nongonococcal urethritis?

Accepted Answer

Chlamydia trachomatis

Question 8

A 30-year-old man presents with a painless ulcer (chancre) on his genitalia three weeks after unprotected sex. Which stage of syphilis is he most likely experiencing?

Accepted Answer

Primary stage

Question 9

Which protein produced by Neisseria gonorrhoeae interferes with the host's immune response by binding to T cell receptors?

Accepted Answer

Opa protein

Question 10

A newborn develops severe conjunctivitis after birth. Which organism is most likely responsible, and what is the name of this condition?

Accepted Answer

Neisseria gonorrhoeae; ophthalmia neonatorum

Question 11

Which of the following best describes the effect of estrogen, $$\mathrm{H}_2\mathrm{O}_2$$, and lactic acid on the vaginal microbiota?

Accepted Answer

They create an acidic environment that inhibits pathogen growth

Question 12

A patient is diagnosed with leptospirosis after swimming in a river. Which of the following is the most likely source of infection?

Accepted Answer

Contact with urine-contaminated water from wild animals

Question 13

Which of the following statements about sexually transmitted infections (STIs) is correct?

Accepted Answer

Most bacterial STIs can be prevented by condom use

Question 14

A woman is diagnosed with pelvic inflammatory disease (PID) and later develops infertility. Which specific condition most likely led to this complication?

Accepted Answer

Salpingitis

Question 15

Which serotypes of human papillomavirus (HPV) are most commonly associated with cervical cancer?

Accepted Answer

Species 33, 18, and 16

Question 16

A patient presents with frothy, greenish-yellow vaginal discharge. Which organism is most likely responsible, and what condition is this?

Accepted Answer

Trichomonas vaginalis; Trichomoniasis

Question 17

Which of the following is a major risk factor for developing vulvovaginal candidiasis?

Accepted Answer

Antibiotic use

Question 18

A patient with a history of unprotected sex presents with a skin rash on the palms and soles. Which stage of syphilis is this most consistent with?

Accepted Answer

Secondary stage

Question 19

Which of the following best describes the main advantage of at-home STI test kits?

Accepted Answer

They allow for more cases to be diagnosed and quicker treatment

Question 20

A patient is diagnosed with bacterial vaginosis. Which event most likely preceded this infection?

Accepted Answer

Decrease in the number of lactobacillus

Microbial Infections of the Urogenital System: Structure, Defense, and Common Diseases

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