QuestionSBA
QuestionChoice
This is the most common pathogen seen in IVDU with infective endocarditis due to potential contamination of needles and skin sites.
10000096
a
*Staphylococcus aureus*
QuestionChoice
This pathogen is often seen in patients with colonic lesions as seen in inflammatory bowel disease or colorectal carcinoma.
10000099
d
*Streptococcus bovis*
QuestionChoice
This is a fungus which acts as an opportunistic pathogen and is not typically associated with infective endocarditis. It commonly affects those who are immunocompromised, for example, patients with HIV/AIDS.
10000100
e
*Pneumocystis jirovecii*
QuestionChoice
This is also a common pathogen causing infective endocarditis. However, it is more commonly seen in patients with poor dentition or dental infections.
10000097
b
*Streptococcus viridans*
QuestionChoice
This is part of the HACEK organism group which can cause infective endocarditis, however, it is not as common as *Staphylococcus aureus* in IVDU.
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c
*Haemophilus influenzae*
Concept
Chapter
2693
3710
Infective Endocarditis
Topic
134
Cardiology
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A 32-year-old female patient who is a known IV drug user (IVDU) presents to A&E with a high fever. On examination, splinter haemorrhages and Janeway lesions are noted.

Which of the following pathogens is the most likely cause of this diagnosis?
a