Clarissa Ferreri

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To the Editor: Since the beginning of May 2011, a large outbreak of infections associated with Shiga toxin (Stx)–producing Escherichia coli (STEC) O104:H4 has occurred in Germany (1). The outbreak showed 3 unusual features: 1) a large proportion of case-patients with hemolytic uremic syndrome (HUS); 2) HUS in adults, although it usually affects children;(More)
The pH preferred and avoided by wild, adult brook trout Salvelinus fontinalis and brown trout Salmo trutta was examined in a series a laboratory tests using gradual and steep-gradient flow-through aquaria. The results were compared with those published for the observed segregation patterns of juvenile S. fontinalis and S. trutta in Pennsylvania streams. The(More)
Many factors have been associated with the decline of brook trout (Salvelinus fontinalis) throughout their native range including acidification and competition with brown trout (Salmo trutta), an introduced species. We observed the behavior of wild, adult brook trout and brown trout (alone and in combination) within study reaches that were manipulated to(More)
The goal of this study was to determine if short-term exposure of brook trout Salvelinus fontinalis and brown trout Salmo trutta to a lower pH than found in their source stream results in a shift in preference or avoidance pH. The lack of a shift in preference or avoidance pH of adult S. fontinalis and S. trutta suggests that these species can be held at a(More)
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