Fish-tank granuloma

Gray SF, Smith RS, Reynolds NJ, Williams EW (1990) Fish tank granuloma. BMJ 300 1069-1070... 

Fish tank granuloma can be professional (workers in charge of aquarium maintenance) or non-professional (due to cleaning the home aquarium). The sites involved are the hands and forearms. Apart from clinical forms with a single plaque, sporotrichoid forms are frequently observed with nodules having a rosary-like spread and ulcerative evolution (Fig. 2). 

Fig. 2. Sporotrichoid fish-tank granuloma in aquarium maintenance worker...

In Mycobacterium marinum infection (Califano et al. 1998), called fish-tank granuloma or swimming pool granuloma, the association of skin infection with aquariums and tropical fish has been noted. A prick from a rose thorn might also cause the infection. This is characterized by the presence of one papule, nodule or erythematous plaque with a verrucous surface on the dorsum of the distal phalanx of the finger. 

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