Abstract
Electron microscopical observations of skin tumors of Dover Sole, Microstomus pacificus, taken near sewage outfalls at Santa Monica Bay, Newport Beach, and Port Hueneme, California reveal mycoplasma-like organisms in all tumors (nine) of the five specimens. Since a mycoplasma, Acholeplasma laidlawii, has been isolated from sewage, the presence of mycoplasma-like organisms (if indeed they are mycoplasmas) in the skin tumors of M. pacificus suggests that sewer effluent may be a possible source.
