Koplik's spot is the typical sign of

RRB Nsg. Superintendent-20 July 2019 (Shift-3rd)

Child Health Nursing (Pediatrics)

Easy

Appeared in: RRB Nsg. Superintendent-20 July 2019 (Shift-3rd)

Explanation

Koplik's spots are a pathognomonic sign of measles (rubeola), meaning their presence is diagnostic for the disease.
These spots are described as small, bluish-white lesions on an erythematous (red) base, often found on the buccal mucosa opposite the molars.
They are a key diagnostic feature because they appear in the prodromal stage, 1-2 days before the onset of the characteristic full-body rash, allowing for early diagnosis and isolation.

Option A: Pertussis, or whooping cough, is a bacterial infection. Its hallmark sign is severe, paroxysmal coughing fits followed by a high-pitched 'whoop' sound during inspiration, not oral lesions.
Option B: Mumps is a viral infection characterized by parotitis, which is the painful swelling of one or both of the parotid salivary glands, located below and in front of the ears.
Option D: Diphtheria is a bacterial infection known for the formation of a thick, gray, adherent pseudomembrane over the tonsils, pharynx, or larynx, which can cause airway obstruction. It can also cause a 'bull neck' appearance due to swollen lymph nodes.

Visual 1: Photograph - A close-up image of the inside of a cheek showing the characteristic bluish-white Koplik's spots on a red background to help learners identify this key diagnostic sign.
Visual 2: Infographic - A comparative chart illustrating the key signs of Measles (Koplik's spots, rash), Mumps (parotitis), Pertussis (whooping cough), and Diphtheria (pseudomembrane).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pathognomonic signs of childhood infectious diseases as background academic context rather than a clinical decision trigger.
Early identification of Koplik's spots is a critical nursing assessment skill. It allows for prompt diagnosis and the implementation of airborne precautions for measles, which is highly contagious, thereby preventing nosocomial spread and community outbreaks.
A thorough oral assessment is essential in pediatric patients presenting with fever and malaise, as it can reveal key diagnostic signs like Koplik's spots.
What if? If a child presents with a maculopapular rash but no Koplik's spots were observed, the nurse should consider other viral exanthems like Rubella (German measles) or Roseola, as the absence of this key sign makes a measles diagnosis less certain.

How to Approach the Question

First, identify the key term in the question stem: 'Koplik's spot'.
Recognize that this is a factual recall question testing your knowledge of pathognomonic (highly specific) signs of infectious diseases.
Systematically recall the classic signs associated with each of the four options provided.
Associate Pertussis with a 'whooping' cough.
Associate Mumps with parotitis (swollen salivary glands).
Associate Diphtheria with a pharyngeal pseudomembrane.

Concept Tested & Keywords

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