A patient presents with vulval itching, a sore vagina, and a profuse, white curdy discharge with erythema and redness at the introitus. What is the likely diagnosis?

1. A

   Bacterial vaginosis

2. B

   Chlamydia

3. C

   Trichomonas vaginalis

4. D

   Candidiasis

Appeared in: ISRO 2024

Explanation

• The correct diagnosis is Candidiasis, also known as a yeast infection.
• This condition is characterized by a specific combination of symptoms: intense vulvar itching (pruritus), soreness, and inflammation (erythema).
• The most definitive sign described in the question is the 'profuse, white curdy discharge,' which is often compared to cottage cheese.
• These symptoms are the classic presentation of an overgrowth of the fungus Candida albicans in the vagina.
• Unlike other common vaginal infections, the vaginal pH in candidiasis is typically normal (less than 4.5).

Why Other Options Were Wrong

• Option A: Bacterial vaginosis (BV) is incorrect because it typically presents with a thin, homogeneous, grayish-white discharge and a characteristic 'fishy' odor, especially after intercourse. It does not cause the severe inflammation or curdy discharge seen in this case.
• Option B: Chlamydia is incorrect as it is a bacterial STI that is often asymptomatic in women. When symptoms do occur, they typically include a mucopurulent (mucus and pus) cervical discharge and possibly intermenstrual bleeding, not a white, curdy vaginal discharge.
• Option C: Trichomonas vaginalis is a protozoan STI. It is incorrect because it characteristically causes a profuse, frothy, yellow-green, and malodorous discharge. While it causes itching and inflammation (sometimes a 'strawberry cervix'), the discharge is distinctly different from the white, curdy type.

Related Visual

Clinical Relevance

• Nursing practice connection: Use the key finding related to Differential diagnosis of vaginitis based on clinical presentation to guide bedside assessment, documentation, and the next nursing action.
• Nurses are often the first point of contact for patients with gynecological symptoms. Accurate assessment of the type of vaginal discharge, associated symptoms, and patient history is critical for correct diagnosis and effective treatment.
• Patient education is a key nursing role. This includes teaching about medication adherence, proper hygiene (e.g., wiping front to back), avoiding douching (which alters vaginal flora), and wearing breathable cotton underwear to reduce recurrence.
• Misdiagnosis can lead to incorrect treatment, persistent symptoms, and potential complications. For example, using an antifungal for a bacterial infection will be ineffective.

How to Approach the Question

• First, carefully read the clinical scenario and identify all the patient's signs and symptoms: vulval itching, sore vagina, profuse discharge, and erythema/redness.
• Pay close attention to the specific description of the discharge: 'white' and 'curdy'. This is the most significant clue.
• Systematically evaluate each option based on your knowledge of common vaginal infections.
• Recall that Candidiasis is classically associated with a thick, white, cottage cheese-like discharge and intense itching.
• Contrast this with Bacterial Vaginosis (thin, gray, fishy odor), Trichomoniasis (frothy, yellow-green, malodorous), and Chlamydia (often asymptomatic or mucopurulent).
• Select the diagnosis that perfectly matches the hallmark signs presented in the question.

Concept Tested & Keywords

• Concept Tested: Differential diagnosis of vaginitis based on clinical presentation.
• Stem keywords: vulval itching, sore vagina, profuse, white curdy discharge, erythema, redness at introitus
• Lead-in keywords: likely diagnosis
• Clinical cues: The description of the discharge as 'white and curdy' is the most specific clinical clue pointing towards Candidiasis.

Question ID

Qb5y51LsGLb4C5Ybg0pAvf

Copy ID

Reference Book

E6 Gynecology Williams p. 69-92

E6 Medicine Davidson Principles Practice 24e p. 355-357

E6 Medicine Harrison 22e Part 1 p. 1142-1144