Paediatric pneumonia — causative organism
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Teaching point — how the wording changes the answer
Most common bacterial CAP in children = Streptococcus pneumoniae. Shift toward ATYPICAL (Mycoplasma) when: older child, extrapulmonary features (diarrhoea, headache, low-grade course), interstitial / perihilar pattern on CXR.
Q4
3-year-old, respiratory symptoms + abdominal distension, CXR pneumonia. Organism?
Key clue
Classic lobar
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Streptococcus pneumoniae
Q44
Paeds pneumonia with X-ray, most common organism?
Key clue
'Most common'
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Streptococcus pneumoniae
Q137
3-year-old fever, abdominal pain, DIARRHOEA, normal chest auscultation
Key clue
Diarrhoea + clear chest -> atypical
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Mycoplasma / Legionella (atypical)
Q216
5-year-old fever, diarrhoea, X-ray atypical pneumonia
Key clue
Atypical pattern + diarrhoea
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Mycoplasma (atypical)
Q350
3-year-old respiratory + abdominal distension, lower-lobe pneumonia. Organism?
Key clue
Lobar
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Streptococcus pneumoniae
NA-2
3-year-old, fever 39.5, irritability, CXR atypical with PREHILAR lymphadenopathy
Key clue
Perihilar lymphadenopathy -> atypical
Show answer
Mycoplasma pneumoniae