QuestionSBA
QuestionChoice
*Legionella pneumoniae* presents with fevers, muscle pain, shortness of breath, and a dry cough. It causes low sodium levels and deranged LFTs on blood results.
10025030
a
*Legionella pneumoniae*
QuestionChoice
*Streptococcus pneumoniae* is one of the most common causes of community-acquired pneumonia so is a good differential. However, the low sodium and deranged LFTs here are indicative of a legionella pneumonia.
10025034
e
*Streptococcus pneumoniae*
QuestionChoice
*Pneumocystis jirovecii* usually presents as a lower respiratory tract infection in patients who are immunosuppressed e.g. those who are HIV-positive and have a CD4 count is under 200 cells/uL. This patient is most likely to have an infection caused by *legionella pneumoniae* given their blood results.
10025033
d
*Pneumocystis jirovecii*
QuestionChoice
*Mycoplasma pneumoniae* would typically appear present with flu-like symptoms and a possible rash. It also has the potential to cause autoimmune haemolytic anaemia. This patient is most likely to have an infection caused by *legionella pneumoniae* given their blood results.
10025031
b
*Mycoplasma pneumoniae*
QuestionChoice
*Klebsiella pneumoniae* usually affects patients with weakened immune systems, which includes elderly patients and those with diabetes. It is also a common cause of aspiration pneumonia so may be seen in patients with risk factors for aspiration, such as alcoholics. The patient would usually describe having  ‘’red currant’’ sputum.
10025032
c
*Klebsiella pneumoniae*
Concept
Chapter
2693
5818
Pneumonia (Infectious Diseases)
Topic
194
Infectious Diseases
17404
A 23-year-old female presents to A&E with a non-productive cough and fever for five days. She is diagnosed with a lower respiratory tract infection. Blood results show low sodium levels and deranged liver function tests (LFTs).

Given the likely diagnosis, which of the following is the most likely causative organism?
a