Rocky mountain spotted fever Disease traced to squirrels and porcupines. RY,N. Aug 22. 1958 , P-31 Description of insect and prevention of spotted fever. statistics. Colorado Information, May 25, 1961 1963 tick fever incidence high. Post June 19, 1963 P-56 Most,cases of Rocky Mountain Spotted fever are found in Southern Appalachians. RMN Jan. 11,1965 P-17 Heavy tick infestation, high fever incidence reported. RMN My 29, 1969 P-5