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Old 02-27-2013
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Bacteria Black skin lesion in HIV patient

A 35 year old man is positive for HIV and develops sepsis with subsequent development of necrotic lesion in buttock that has black center and an erythematous margin. Which is most likely pathogen?
1. Clostridium Perfringes
2. Bacillus Anthracis
3. Enterococcus fecalis
4. Pseudomonas aeuroginosa
5. Staph aureus
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Old 02-27-2013
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Pseudomonas

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Old 02-27-2013
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ecthyma gangrenosum; pseudomonas
part. in immunocomp. and neutropenic patients
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Pseudomonas
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Old 02-28-2013
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Yes, Pseudomonas in setting of immunocompromised state.. Called as Ecthyma gangrenosum.. why its not anthrax is that it would rather appear at point of contact so not probably at buttock..
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Old 03-01-2013
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Default Black skin lesion in HIV patient

Ecthyma gangrenosum: Initially had sepsis, followed by the skin lesion, in an immunocompromised state. Anthrax is a good DDx and the skin lesion mentioned is typical but occurs at exposure site and is the first to appear if the mode of transmission is skin contact.
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Old 03-05-2013
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Straight outta First Aid:

P
Sepsis (Black lesions on skin)
E
U
D
O
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