by Stephen Holt, MD, MS

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    00:01 Lastly, impetigo.

    00:04 Alright, so impetigo is a bacterial infection.

    00:08 Again, i know we're putting it into the fungal skin infections, but we're gonna talk about this one for a moment.

    00:13 It's most commonly caused by staph and strep.

    00:17 Usually, it starts off with little papules that then progress to vesicles with surrounding erythema and then ultimately those vesicles can start to fill with pus and then we've got pustules.

    00:27 When the pustules rupture, out comes this thick, sticky, golden crust.

    00:32 And again, that's the pathognomonic terminology you might see in a board question.

    00:36 Most commonly though, we're seeing this in kids like ages 2-5 years old or in much older patients, elderly patients or those with HIV.

    00:47 Now if you see any bullous lesions, think more about staph rather than strep, occasionally you can even see an ulcerated area called an ecthyma.

    00:56 These lesions are not typically itchy.

    01:00 They can however progress fairly rapidly to deeper skin infections with some very serious complications that are best left for a different lecture.

    01:09 If it's mild, you can just get away with topical mupirocin.

    01:12 Whereas if it's moderate or severe, you're gonna need an oral agent that's targeting common strep or staph like cephalexin or dicloxacillin, if you're not worried about MRSA or anything like that.

    01:25 So again, this lesion that our patient has, is erythematous but it lacks all the vesicles and pustules and sticky golden crusts.

    01:33 So I think impetigo is out as well.

    About the Lecture

    The lecture Impetigo by Stephen Holt, MD, MS is from the course Skin Infections.

    Included Quiz Questions

    1. Staphylococcus aureus
    2. Streptococcus pyogenes
    3. Pseudomonas aeruginosa
    4. Streptococcus pneumoniae
    5. Vibrio vulnificus

    Author of lecture Impetigo

     Stephen Holt, MD, MS

    Stephen Holt, MD, MS

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