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glossary:ecthyma [2008/05/15 02:38]
Pat O'Connor
glossary:ecthyma [2012/10/16 14:40] (current)
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 +====== ​ Ecthyma ======
 + ​(ek-thi´mah) A shallowly ulcerative form of [[:​impetigo]],​ chiefly on the shins or forearms. [[Skin]] [[infection]] usually caused by neglect of impetigo. Has shallow [[lesion]]s with crusts or scabs, followed by discoloration and scarring. Streptococcus pyogenes and/or Staphylococcus aureus are the bacteria responsible for ecthyma.
 +===== Contagious ecthyma =====
 +Contagious ecthyma (contagious pustular dermatitis) is caused by orf [[virus]], a poxvirus that infects ruminants (most often sheep and goats). Farmers, veterinarians,​ zoo caretakers, and others with direct animal contact are at risk. The [[cutaneous]] findings pass through 6 stages that last about 1 wk: (1) papular, a single red edematous papule appears on a finger (most commonly right index finder); (2) target, a larger nodule with a red center surrounded by a white ring with a red periphery; (3) acute, a rapidly growing infected-looking [[tumor]]; (4) regenerative,​ a nodule with black dots covered with a thin transparent crust; (5) papillomatous,​ a nodule with a surface studded with small projections;​ (6) regressive, a nodule flattened with a thick crust. Patients can develop regional [[adenopathy]],​ [[:​lymphangitis]],​ and fever. ​
 +===== Ecthyma gangrenosum (EG) =====
 +Ecthyma gangrenosum (EG) is a well-recognized [[cutaneous]] [[infection]] most commonly associated with a Pseudomonas aeruginosa bacteremia. EG usually occurs in patients who are critically ill and immunocompromised. The characteristic lesions of EG are hemorrhagic pustules or infracted-appearing areas with surrounding [[erythema]] that evolve into necrotic ulcers surrounded by [[erythema]]. These were first described in association with Pseudomonas [[septicemia]] by Barker in 1897 and were later given the name "​ecthyma gangrenosum"​ by Hitschmann and Kreibich.
 + See also: * [[:​Infections Associated with Lymphedema]]
 +           * [[http://​​thesite/​lymphedema_antibiotics.htm|Lymphedema Antibiotics]]  ​
 +           * [[http://​​phpBB2/​viewforum.php?​f=34 |Antibiotic Glossary]]  ​
glossary/ecthyma.txt · Last modified: 2012/10/16 14:40 (external edit)