Maryland is smarter than the Colorado Div of Wildlife. The State of Colorado stocked infected fish for years from it's own infected hatcheries. Maryland also has infected fish hatcheries but the fish are being destroyed "at two facilities in Garrett County"
"Trout from positive hatcheries will be stocked into waters where the parasite has been found to minimize the risk of contaminating other watersheds. Only trout from negative testing hatcheries can be stocked into waters where the parasite has not been found. "
Whirling Disease and Colorado's Trout - Colorado Division of Wildlife
"A disease that attacks the bone structure of young fish has wiped out 90% of Colorado's wild rainbow trout in six of the state's best trout streams, a state study shows. The study by the Colorado Division of Wildlife also found that Whirling disease has reached 12 of the state's 15 trout hatcheries
, threatening the state's $420 million-a-year fishing industry."
Whirling disease, trout - USA (Colorado)
Subsequent research showed that parasite dose exposure in the environment increases infection rates and decreases survival. The Colorado Div of Wildlife stocking increased the infection rate.
"Parasite dose strongly determines the severity of whirling disease, which generally increases with the number of triactinomyxons the fish encounters (Hoffman 1974; O’Grodnick 1979; Markiw 1991, 1992a, 1992b; Hedrick et al. 1999a; Thompson et al. 1999; Densmore et al. 2001; Ryce et al. 2001; Ryce et al. 2004; Ryce et al. 2005)."
BTW, Whirling Disease has spread beyond the Potomac River basin in Maryland. "Although whirling disease (WD) presence in Maryland was documented as early as 1995, it became a larger issue in early 2007 with the discovery of infected fish at the Bear Creek hatchery in the Youghiogheny River basin. This was the first documentation in Maryland outside of the North Branch Potomac River (NBPR)."
Maryland Department of Natural Resources Fisheries Service
---------- Post added at 04:46 PM ---------- Previous post was at 04:44 PM ----------
Originally Posted by fredaevans
That IS NOT a good read; any idea where they got the infected fish?
Could have been from one of it's own infected hatcheries before the infection was discovered. See my post above.