Koplik's spots is associated with the diagnosis of which of the following diseases?

Appeared in: NVS Staff Nurse - 2019

Explanation

Koplik's spots are considered pathognomonic for measles (rubeola), meaning their presence is a definitive sign of the disease.
These spots are small, bluish-white lesions surrounded by a red halo, typically found on the buccal mucosa opposite the molars.
They appear 1-2 days before the onset of the characteristic maculopapular rash, serving as an important early diagnostic clue for clinicians.

Option A: Rubella (German measles) is not associated with Koplik's spots. Its characteristic enanthem, when present, is Forchheimer spots, which are small, red petechiae on the soft palate.
Option B: Mumps is a viral illness characterized by painful swelling of the parotid glands (parotitis). It does not produce any specific oral lesions like Koplik's spots.
Option D: Chickenpox (varicella) is identified by a highly itchy, vesicular rash often described as 'dew drops on a rose petal.' Lesions appear in successive crops, so macules, papules, vesicles, and crusted lesions can be seen simultaneously. It does not cause Koplik's spots.

Clinical Relevance

Nursing practice connection: Use the key finding related to Identification of pathognomonic signs for common childhood infectious diseases to guide bedside assessment, documentation, and the next nursing action.
Early identification of Koplik's spots allows for prompt implementation of airborne precautions to prevent the spread of the highly contagious measles virus.
A nurse's report of suspected Koplik's spots to a physician can lead to early diagnosis and public health interventions, such as contact tracing and post-exposure prophylaxis for susceptible individuals.
What if? If the patient had painful swelling below the ear instead of spots in the mouth, the primary suspicion would shift from measles to mumps, requiring droplet precautions instead of airborne precautions.

How to Approach the Question

First, identify the key term in the question stem: 'Koplik's spots'.
This is a factual recall question that tests your knowledge of pathognomonic (highly specific) signs of infectious diseases.
Recall the classic signs associated with each of the options provided.
Associate Koplik's spots specifically with Measles (Rubeola).
Mentally differentiate this from the signs of the other diseases: Rubella (Forchheimer spots), Mumps (parotitis), and Chickenpox (vesicular rash in crops).
Select the option that correctly links the pathognomonic sign to the disease.

Concept Tested & Keywords

Concept Tested: Identification of pathognomonic signs for common childhood infectious diseases.
Stem keywords: Koplik's spots, diagnosis, diseases
Lead-in keywords: associated with
Negative lead-in flag: false

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E6 Medicine Harrison 22e Part 1 p. 1682-1684

E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 1965-1967

Practise the full NVS Staff Nurse - 2019

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