The loss of large wood affects rocky mountain trout populations

Patterns of hybridization among cutthroat trout and rainbow trout in northern Rocky Mountain streams

Introgressive hybridization between native and introduced species is a growing conservation concern. For native cutthroat trout and introduced rainbow trout in western North America, this process is thought to lead to the formation of hybrid swarms and the loss of monophyletic evolutionary lineages. Previous studies of this phenomenon, however, indicated that hybrid swarms were rare except when...

Rocky Mountain spotted fever.

Rocky Mountain spotted fever (RMSF) is a life-threatening disease caused by Rickettsia rickettsii, an obligately intracellular bacterium that is spread to human beings by ticks. More than a century after its first clinical description, this disease is still among the most virulent human infections identified, being potentially fatal even in previously healthy young people. The diagnosis of RMSF...

Rocky Mountain spotted fever.

R ocky Mountain spotted fever (RMSF), a classic metazoonosis that involves both vertebrate and non-vertebrate reservoir hosts, is a seasonal disease of dogs and humans in the Americas. The clinical illness was first described among Native Americans, soldiers, and settlers in the Bitterroot River and Snake River valleys of Montana and Idaho during the late 1890s, but remained unrecognized in dog...

Relations of Geomorphology to Stream Habitat and Trout Standing Stock in Small Rocky Mountain Streams

Rocky Mountain Spotted Fever, Panama

We describe a fatal pediatric case of Rocky Mountain spotted fever in Panama, the first, to our knowledge, since the 1950s. Diagnosis was established by immunohistochemistry, PCR, and isolation of Rickettsia rickettsii from postmortem tissues. Molecular typing demonstrated strong relatedness of the isolate to strains of R. rickettsii from Central and South America.