A 14,100 cal B. P. Rocky Mountain locust cache from Winnemucca Lake, Pershing County, Nevada

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...

Using Seismic Reflection to Locate a Tracer Testing Complex South of Yucca Mountain, Nye County, Nevada

Contagious ecthyma in a Rocky Mountain bighorn sheep from Utah

In December 2008, near Flaming Gorge Reservoir in northeastern Utah, a 2 1⁄2-yearold male Rocky Mountain bighorn sheep (Ovis canadensis canadensis) was reported in poor body condition with bloody lesions covering the muzzle area. The sheep was euthanized, and samples were submitted to the Utah Veterinary Diagnostic Laboratory in Logan, Utah. The gross and microscopic lesions confi rmed the diag...

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.