QuestionSBA
QuestionChoice
This is normally seen in Klebsiella pneumoniae infection, which more commonly affects elderly patients or those with alcohol excess.
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d
Redcurrant jelly sputum
QuestionChoice
This can be associated with Streptococcus pneumoniae infection, the most common cause of community acquired pneumonia. The presence of flu-like symptoms as well as recent air conditioning exposure make this diagnosis less likely.
10028323
c
Presence of cold sores
QuestionChoice
Anaemia (specifically cold autoimmune haemolytic anaemia) is a finding associated with Mycoplasma, rather than Legionella.
10028325
e
Anaemia
QuestionChoice
This describes the erythema multiforme typically seen in Mycoplasma pneumonia, another cause of an atypical pneumonia which is less associated with exposure to air conditioning and foreign travel.
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b
Presence of target lesions on examination
QuestionChoice
The history of recent foreign travel (e.g. exposure to air conditioning) combined with the flu-like symptoms suggests a pneumonia caused by Legionella pneumophilia. This is thought to be due to syndrome of inappropriate ADH secretion.
10028321
a
Hyponatraemia
QuestionComment
Why is it assumed that all 'old' hotels abroad are riddled with Legionella! Give the poor Spaniards a break! 
53600
User
subscriber
Dr. Moe Lester
Concept
Chapter
2693
3709
Pneumonia
Topic
132
Respiratory
18062
Legionella pneumophila pneumonia often presents with hyponatraemia due to the syndrome of inappropriate antidiuretic hormone secretion.
A 65-year-old businesswoman has a dry cough and flu-like symptoms on returning home from a trip to Spain. She stayed in an old hotel whilst there. On examination, she is febrile and has bibasal crackles.
A chest x-ray shows patchy bibasal consolidation.

Given the likely causative organism, which of the other below findings would be expected?
a