What is the pathogenesis of pyoderma (impetigo contagiosa) (nonbullous impetigo) in group A streptococcal (GAS) infections?

Updated: Sep 07, 2018
  • Author: Zartash Zafar Khan, MD, FACP; Chief Editor: Pranatharthi Haran Chandrasekar, MBBS, MD  more...
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Answer

The bacterial toxins cause proteolysis of epidermal and subepidermal layers, allowing the bacteria to spread quickly along the skin layers and thereby cause blisters or purulent lesions. The other common cause of impetigo is Staphylococcus aureus.


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