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Ch. 20 - Urinary and Reproductive System Infections
Norman-McKay- Microbiology: Basic and Clinical Principles 2nd Edition
Norman-McKay2nd EditionMicrobiology: Basic and Clinical PrinciplesISBN: 9780137661619Not the one you use?Change textbook
All textbooksNorman-McKay 2nd EditionCh. 20 - Urinary and Reproductive System InfectionsProblem 3
Chapter 20, Problem 3

A patient you are assessing reports an increase in vaginal discharge that has a foul odor, but she does not report other symptoms. The patient has been in a monogamous relationship for 3 years. Which of the following would be the most useful for this patient? Select all that apply.
a. Evaluate her urine for increased white blood cells
b. Perform a Gram stain on the vaginal discharge
c. Run a pregnancy test
d. Test for an STI
e. Perform a whiff test

Verified step by step guidance
1
Step 1: Understand the clinical presentation. The patient reports increased vaginal discharge with a foul odor but no other symptoms, and she is in a monogamous relationship. This suggests a possible vaginal infection, such as bacterial vaginosis or another cause of abnormal discharge.
Step 2: Consider diagnostic tests that directly assess the vaginal discharge. Performing a Gram stain on the vaginal discharge (option b) helps identify the presence of bacteria and their morphology, which is useful for diagnosing infections like bacterial vaginosis or candidiasis.
Step 3: The whiff test (option e) involves adding potassium hydroxide (KOH) to the vaginal discharge to detect a characteristic fishy odor, which is a key diagnostic clue for bacterial vaginosis.
Step 4: Testing for sexually transmitted infections (STIs) (option d) is important if there is suspicion of an STI, even in a monogamous relationship, because some infections can be asymptomatic and still cause discharge.
Step 5: Evaluating urine for increased white blood cells (option a) is more relevant for urinary tract infections rather than vaginal infections, and a pregnancy test (option c) is useful if pregnancy status is unclear but does not directly diagnose the cause of discharge.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Vaginal Discharge and Its Clinical Significance

Vaginal discharge can indicate normal physiological processes or infections. Changes in odor, color, or amount often suggest an underlying condition such as bacterial vaginosis or sexually transmitted infections. Understanding these changes helps guide appropriate diagnostic testing and treatment.
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Diagnostic Tests for Vaginal Infections

Common diagnostic tests include Gram stain to identify bacterial flora, the whiff test to detect amines indicating bacterial vaginosis, and STI screening to rule out infections. These tests help differentiate causes of abnormal discharge and guide targeted therapy.
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Role of Pregnancy Testing in Vaginal Symptoms

Pregnancy testing is important when evaluating vaginal symptoms because pregnancy can alter vaginal flora and symptoms. Additionally, some treatments or diagnostic procedures may be contraindicated in pregnancy, making this test a critical step in patient assessment.
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Related Practice
Textbook Question

A patient you are assessing reports an increase in vaginal discharge that has a foul odor, but she does not report other symptoms. The patient has been in a monogamous relationship for 3 years. Which of the following would be the most useful for this patient? Select all that apply.

a. Evaluate her urine for increased white blood cells

b. Perform a Gram stain on the vaginal discharge

c. Run a pregnancy test

d. Test for an STI

e. Perform a whiff test

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Textbook Question

Which of the following does not fall into our current definition of TORCH infections?

a. Syphilis

b. Trichomoniasis

c. HIV

d. Rubella

e. Cytomegalovirus

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Textbook Question

A male patient is complaining of frothy discharge and painful urination. After negative NAAT testing, you will most likely prescribe:

a. Penicillin

b. Tetracycline

c. A cephalosporin

d. Metronidazole

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Textbook Question

How do lactobacilli limit infections in the vagina? Select all that apply.

a. They competitively exclude potential pathogens

b. They make hydrogen peroxide

c. They ferment fructose to make lactic acid

d. They lower the vaginal pH, which limits pathogen growth

e. They increase the rate of vaginal mucus secretion

Textbook Question

Factors that contribute to vulvovaginal candidiasis include:

a. Low vaginal pH

b. High nitrates in urine

c. Increased blood bilirubin levels

d. Increased estrogen levels

e. Taking a fluconazole drug

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