| spotted fever group rickettsiae in immature and adult ticks (acari: ixodidae) from a focus of rocky mountain spotted fever in connecticut. | immature and adult ixodid ticks were collected during 1983 and 1984 in newtown, connecticut, an area endemic for rocky mountain spotted fever (rmsf), to determine prevalence of infection by spotted fever group (sfg) rickettsiae. direct fluorescent-antibody (fa) staining revealed sfg organisms in 6 (1.8%) of 332 dermacentor variabilis larvae, 5 (7.8%) of 64 d. variabilis nymphs, and in 2 (40%) of 5 ixodes cookei nymphs removed from small- and medium-sized mammals. hemolymph tests detected rickett ... | 1985 | 3938341 |