Question

The causative organism for the condition depicted in image is?

• A. Staphylococci
• B. Candidal infection
• C. Streptococcus
• D. Actinomycetes

Answer 1

The Correct Option is A

Step 1: Read the lesion morphology first. Tense, thin-walled blisters that collapse into a clear, lacquer-like crust point straight to the bullous subtype of impetigo rather than the honey-crusted classic form.
Step 2: The bulla in this disease is produced by an exotoxin. The epidermolytic (exfoliative) toxin cleaves desmoglein-1 in the superficial epidermis, lifting the roof and creating a flaccid blister. This toxin is a product of $S.\ aureus$.
Step 3: Epidemiologically, impetigo is the leading paediatric skin infection and spreads easily by contact. The clue separating bullous from non-bullous disease is the distinctive varnish-like crust after rupture, a hallmark of the staphylococcal lesion.
Step 4: Eliminate the rest: $Streptococcus$ underlies the crusted non-bullous form, while $Candida$ and $Actinomyces$ never generate this toxin-driven blistering. Hence the organism shown is staphylococcal.
\[\boxed{\text{Staphylococci}}\]