Bacterial infections: uncommon presentations

Upper-limb acute superficial lymphatic thrombosis: A case report

Upper‐limb acute superficial lymphatic is a rare phenomenon that has received little attention in the medical literature to date, yet it mimics superficial venous thrombosis and may also complicate a skin punch biopsy.

Ecthyma: a potential mimicker of zoonotic infections in a returning traveler

The cutaneous ulcer in a patient with a history of international travel poses a vexing diagnostic dilemma for the clinician. While Streptococcus and Staphylococcus are common causes of cutaneous ecthyma, the necrotizing ulcer can have a vast differential diagnosis including ulcerating zoonoses.

Edmund Biernacki (1866-1911): Discoverer of the erythrocyte sedimentation rate. On the 100th anniversary of his death

In contemporary medicine, the erythrocyte sedimentation rate (ESR) is used to assess severity in patients with such diseases as erysipelas, psoriasis, eosinophilic fasciitis, dermatomyositis, and Behçet's disease. We remember the scientific achievements of a Polish physician, the discoverer of the erythrocyte sedimentation rate (ESR), Edmund Faustyn Biernacki (1866-1911), on the 100th anniversary of his death. The practical application of ESR in clinical diagnostics in 1897 by Biernacki was little known for many years, because it was often neglected owing to the work of Robert Fåhraeusand Alf Westergren from 1921. In addition, it is also frequently omitted that before Westergren's and Fåhraeus's reports were published, ESR was also noticed by Ludwig Hirschfeld in 1917.

[Primary cutaneous infections due to Staphylococcus and Streptococcus]

Pyodermitis constitutes a very important chapter in dermatological practice. Its pathogenesis, in special the one caused by S. aureus, has improved due to the knowledge of the role developed by the host defensins, quorum-sensing signaling and the Panton-Valentine leucocidin gene among others. As well, exfoliative toxins and enterotoxins responsible for the staphylococal scalded skin syndrome (SSSS) and toxic shock syndrome, respectively, have been cloned. Also, it has been seen that bullous impetigo, SSSS and pemphigus foliaceus share a common target: desmoglein-1. The Panton-Valentine leucocidin gene has been related to the appearance of abscesses, necrotic cutaneous lesions and furuncles in young persons caused by meticillin resistant S. aureus, with its epidemiological implications. Finally, some atypical forms of erysipelas suppose a diagnostic challenge for the dermatologist.