Wild bluegill, Lepomis macrochirus Rafinesque, succumb to seasonal mortality in the early spring during cool water temperatures, shown previously to be related to bacteraemia caused by a psychrotrophic bacterium, Pseudomonas mandelii . In the study herein, intestinal coccidiosis in wild bluegill had seasonal prevalence causing heavy intestinal infections and sloughing of intestinal epithelium occurring in late winter/early spr...

An undescribed species of Microsporidia Balbiani, 1882 was isolated from the muscularis mucosa of the intestinal mucosa of the reared Atlantic bluefin tuna (Thunnus thynnus). Transmission electron microscopy showed that the pyriform unikaryotic microsporidium, measuring 3.6 μm ± 0.08 in length and 1.8 μm ± 0.04 in width (inferred from TEM sections), had two layers of 14–17 coils of polar filament and a robust manubrium of the...