Which of the following is NOT a common cause for vaginitis?

Appeared in: AIIMS BBSR SNO - 2019

Explanation

Salmonella is a genus of bacteria primarily known for causing foodborne illnesses, such as gastroenteritis or typhoid fever.
It infects the intestinal tract through contaminated food or water and is not a recognized pathogen of the female genital tract that causes vaginitis.
Salmonella matches the defining clue or classification criterion in the stem.
Supporting mechanism: The option aligns with the governing rule, pattern, sequence, classification, or exam logic being tested.
Key differentiator: It fits the one fact that separates the correct response from the closest distractor.

Option B: Trichomonas vaginalis is a well-known cause of vaginitis.
Option C: Candida species, particularly Candida albicans, are a very common cause of vaginitis.
Option D: Gardnerella vaginalis is a key bacterium associated with a type of vaginal inflammation.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Etiology of vaginitis as background academic context rather than a clinical decision trigger.
Accurate identification of the causative agent of vaginitis is crucial for selecting the correct treatment (e.g., antibacterial, antifungal, or antiprotozoal) and providing appropriate patient education.
Nurses play a key role in collecting specimens for diagnosis (e.g., wet mount, pH testing, cultures) and educating patients on treatment adherence, hygiene practices, and prevention of recurrence or transmission.
What if? If a patient with vaginitis symptoms also reports recent consumption of undercooked poultry and has severe diarrhea, a nurse should consider the possibility of a concurrent systemic illness like salmonellosis, which requires different management and public health reporting.

How to Approach the Question

First, identify the negative keyword 'NOT' in the question. This signals that you must find the option that is an exception.
Second, recall the three most common infectious causes of vaginitis: bacterial vaginosis (involving Gardnerella), candidiasis (yeast infection), and trichomoniasis.
Third, evaluate each option against this knowledge. 'Trichomonas', 'Candida', and 'Gardnerella' are all directly linked to these common vaginal infections.
Fourth, analyze the remaining option, 'Salmonella'. This bacterium is widely known to cause gastrointestinal illness (food poisoning), not vaginal infections.
Finally, conclude that Salmonella is the outlier and the correct answer because it does not cause vaginitis.

Concept Tested & Keywords

Concept Tested: Etiology of vaginitis
Stem keywords: vaginitis, common cause
Lead-in keywords: NOT
Negative lead-in flag: The question asks to identify the option that is NOT a cause of vaginitis.

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Practise the full AIIMS BBSR SNO - 2019

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