Tetramicra brevifilum (Matthews & Matthews, 1980) (Microsporida: Tetramicriidae) in a new fish host, Lophius budegassa (Spinola, 1807) in Spain.

Tetramicra brevifilum, a microsporidian parasite of Scophthalmus maximus, was found in Lophius budegassa for the first time. This parasite was detected in 5 of 199 hosts captured in the coastal waters of Barcelona (Northwest Mediterranean), which enlarges the geographic distribution of this microsporidian. Affected fish did not show any external sign of disease, and cysts of T.

Longevity and effects of temperature on the viability and polar-tube extrusion of spores of Glugea stephani, a microsporidian parasite of commercial flatfish.

Food contamination with respect to microsporidiosis in humans (associated with acquired immunodeficiency syndrome) and in marine fish farming deserves particular attention. For the first time, a study on the longevity and resistance to both heat and freezing of the spores of a vertebrate microsporidian, Glugea stephani, parasitizing a commercial flatfish was carried out. As judged on the basis of determinations of the extrusion rate, the resistance of the spores to temperature stress was remarkable.