A fisherman who cut himself on a fishing hook later develops a cutaneous disease at the inoculation site.The exudate is aspirated and set up on a routine AFB medium for culture.It is incubated at 37°C,but no growth is observed after 8 weeks;however,a slide of the exudate was AFB-positive.Which one of the following statements explains these findings?
A)The infection is most likely the result of a viral infection.
B)The organism should have been incubated at 30°C.
C)The organism should have been incubated at 42°C.
D)The infection is most likely fungal in nature.

Question

Quizplus · Accepted Answer

The organism is M.marinum,which grows best at 30°C.If specimens are obtained from skin or superficial lesions suspected to contain M.marinum or M.ulcerans,then an additional set of solid media should be inoculated and incubated at 25°C to 30°C.

A Fisherman Who Cut Himself on a Fishing Hook Later