Mycobacterium marinum infection: a case report and review of the literature.

Mycobacterium marinum is a nontuberculous mycobacteria that is often acquired via contact with contaminated salt or fresh water. We present a case of a 67-year-old man who developed several solitary nontender nodules on his hands and forearm after working on the underside of his boat. In addition, we provide a review of the literature and discuss how this infection is acquired, the underlying pathogenesis, the cutaneous and histologic findings, the differential diagnosis, the diagnostic methods, and the various treatment options.

What's eating you? Canine scabies.

Infestation with Sarcoptes scabiei var canis, the causative strain of canine scabies, can produce a pruritic rash in humans. The rash generally manifests within 24 to 96 hours of contact with the affected pet. Scrapings are generally negative, and the correct diagnosis requires a high index of suspicion.