What is the name of the causative agent for Oral Thrush?

Appeared in: Uttarakhand CHO - 2021

Explanation

Oral Thrush, or oropharyngeal candidiasis, is a fungal infection.
The most common causative agent is Candida albicans, a yeast that is part of the normal human microbiota.
It is an opportunistic pathogen, meaning it causes infection when host defenses are weakened (e.g., in immunosuppressed patients, infants, or after antibiotic therapy).
The infection presents as characteristic white, curd-like plaques on the oral mucosa.

Option A: "Salmonella albicans" is a non-existent, biologically incorrect name. Salmonella is a genus of bacteria, while albicans is a species name for a fungus.
Option B: Staphylococcus is a genus of bacteria, not a fungus. It is a common cause of skin infections, pneumonia, and food poisoning, but not oral thrush.
Option D: E. coli (Escherichia coli) is a bacterium, not a fungus. It is a primary cause of urinary tract infections (UTIs) and various forms of gastroenteritis.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Identification of the causative agent for Oral Thrush (Oropharyngeal Candidiasis) as background academic context rather than a clinical decision trigger.
Nurses must be able to identify patients at high risk for oral thrush, including those who are immunocompromised (e.g., HIV/AIDS, chemotherapy patients), on long-term antibiotic or steroid therapy, have diabetes, or wear dentures.
Proper patient education is a key nursing role, especially teaching patients on inhaled steroids to rinse their mouth after use to prevent this common side effect.
Assessment of the oral cavity is a fundamental nursing skill, and recognizing the signs of thrush allows for prompt treatment and prevention of complications like painful swallowing (odynophagia) and spread to the esophagus.

How to Approach the Question

First, identify the key term in the question: 'Oral Thrush'.
Recall or determine the nature of this condition. Oral thrush is a well-known fungal infection of the mouth.
Next, evaluate the options provided. Categorize each option as a bacterium, fungus, or other type of pathogen.
Option A, 'Salmonella albicans', is an incorrect combination of names. Option B, 'Staphylococcus', and Option D, 'E-coli', are bacteria.
Option C, 'Candida albicans', is a fungus (yeast).
Since Oral Thrush is a fungal infection, eliminate the bacterial options. This leaves Candida albicans as the only plausible answer.

Concept Tested & Keywords

Concept Tested: Identification of the causative agent for Oral Thrush (Oropharyngeal Candidiasis).
Stem keywords: causative agent, Oral Thrush
Lead-in keywords: What is
Negative lead-in flag: false

Q6UGKKJRc_iS0bwoZ3yHBH

E6 Medicine Harrison 22e Part 1 p. 1764-1766

E6 Pathology- ROBBINS & COTRAN PATHOLOGIC BASIS OF DISEASE 10TH Ed p. 390-392

E6 Medicine Davidson Principles Practice 24e p. 322-324

Practise the full Uttarakhand CHO - 2021

Attempt every question from this paper in a timed mock, then review the full solution for each one.