Question 1

Which of the following is a major innate defense mechanism of the urinary tract that helps prevent microbial colonization?

Accepted Answer

Flushing action of urine

Question 2

A patient presents with burning pain during urination, frequent urges to urinate, and cloudy urine. Which condition is most likely responsible for these symptoms?

Accepted Answer

Cystitis

Question 3

Which of the following statements best explains why women are more prone to urinary tract infections than men?

Accepted Answer

The female urethra is shorter and closer to the anus

Question 4

Which organism is responsible for the majority of community-acquired urinary tract infections?

Accepted Answer

Escherichia coli

Question 5

A patient is diagnosed with pelvic inflammatory disease (PID) following a chlamydial infection. Which process most likely led to this complication?

Accepted Answer

Ascending infection from the cervix to the fallopian tubes

Question 6

Which of the following is a virulence factor of Neisseria gonorrhoeae that allows it to evade the host immune system?

Accepted Answer

Antigenic variation of fimbrial proteins

Question 7

Which equation best represents the relationship between the acidic pH of the vagina and the concentration of hydrogen ions ($$[H^+]) $$during childbearing years?

Accepted Answer

pH = -\log_{10}([H^+])

Question 8

A patient with recurrent vaginal yeast infections is found to have pseudohyphae in a Gram stain. What does this finding indicate?

Accepted Answer

Active infection with Candida albicans

Question 9

Which of the following best describes the life cycle of Chlamydia trachomatis inside host cells?

Accepted Answer

Conversion of elementary bodies to reticulate bodies inside the phagosome

Question 10

Which of the following is a recommended strategy for preventing the spread of syphilis in a population?

Accepted Answer

Immediate prophylactic penicillin for all sexual contacts of syphilitic patients

Question 11

A patient presents with a painless ulcer on the genitalia that heals spontaneously. Which stage of syphilis does this most likely represent?

Accepted Answer

Primary syphilis

Question 12

Which of the following is a characteristic of genital herpes that distinguishes it from other sexually transmitted infections?

Accepted Answer

Latent infection with periodic reactivation

Question 13

Which of the following drugs is most commonly used to treat uncomplicated urinary tract infections caused by E. coli?

Accepted Answer

Nitrofurantoin

Question 14

A patient with bacterial vaginosis is found to have clue cells on a vaginal smear. What does this finding indicate?

Accepted Answer

Vaginal epithelial cells covered with adherent bacteria

Question 15

Which of the following is a consequence of pelvic inflammatory disease (PID) caused by gonorrhea or chlamydia?

Accepted Answer

Formation of scar tissue leading to infertility or ectopic pregnancy

Question 16

Which of the following best explains why repeated Chlamydia infections increase the risk of infertility?

Accepted Answer

Repair after intense inflammation leads to scarring of the fallopian tubes

Question 17

Which of the following is a recommended treatment for trichomoniasis?

Accepted Answer

Metronidazole

Question 18

Which of the following is a key difference between vaginitis and vaginosis?

Accepted Answer

Vaginitis is characterized by significant inflammation, while vaginosis is not

Question 19

Which of the following is a common complication of untreated syphilis in the tertiary stage?

Accepted Answer

Formation of gummas in tissues

Question 20

Which of the following best describes the effect of estrogen on the vaginal environment during childbearing years?

Accepted Answer

Estrogen increases glycogen secretion, which is fermented by bacteria to produce acid, lowering pH

Infectious Diseases Affecting the Genitourinary System: Structure, Defenses, and Major Pathologies

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