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Rickettsia bellii sp. nov.: a Tick-Borne Rickettsia, Widely Distributed in the United States, That Is Distinct from the Spotted Fever and Typhus Biogroups
During studies to serotype tick-borne rickettsiae from various areas in the United States, particularly those areas associated with the vectors of Rickettsia rickettsii, we obtained 263 isolates of aExpand
A cloned DNA probe identifies Cowdria ruminantium in Amblyomma variegatum ticks.
Heartwater, caused by Cowdria ruminantium and transmitted by ticks of the genus Amblyomma, is a constraint to ruminant animal production in sub-Saharan Africa. This rickettsial disease could spreadExpand
New Blattisociid Mites (Acarina: Mesostigmata) Recovered from Neotropical Flowers and Hummingbirds' Nares
Eleven new species and two new genera of blattisociid mites are described from the nasal passages of tropical hummingbirds, from flowers, or from both. New genera and species and their hosts are:Expand
Isolation of Machupo virus from wild rodent Calomys callosus.
Summary Nine virus strains were recovered from a small group of tissues from the wild rodent Calomys callosus captured in the area of San Joaquin, Bolivia, in 1963. Each virus was successfullyExpand
Pheromone-mediation of host-selection in bont ticks (Amblyomma hebraeum koch).
The bont tick, Amblyomma hebraeum, is the principal vector to southern African ruminants of heartwater (Cowdria ruminantium infection). The role of feeding male ticks, which emit anExpand
Infection rates with Cowdria ruminantium of nymphs and adults of the bont tick Amblyomma hebraeum collected in the field in Zimbabwe.
Cowdria ruminantium (heatwater) infection rates of field populations of the bont tick, Amblyomma hebraeum, were determined at two locations in the southern lowveld of Zimbabwe. At Mbizi QuarantineExpand
Use of carbon dioxide and natural or synthetic aggregation-attachment pheromone of the bont tick,Amblyomma hebraeum, to attract and trap unfed adults in the field
It was determined previously that unfed adults ofAmblyomma hebraeum become active in response to carbon dioxide but are not attracted by it. We have now shown in field experiments that males andExpand
Olfactory responses of adultAmblyomma hebraeum andA. variegatum (Acari: Ixodiae) to attractant chemicals in laboratory tests
Unfed adults of the African ticks,Amblyomma hebraeum Koch andA. variegatum (Fabricius), important vectors of human and animal diseases, were exposed to volatile compounds in an olfactometer inExpand
Contributions to the ecology of Colorado tick fever virus. 2. Population dynamics and host utilization of immature stages of the Rocky Mountain wood tick, Dermacentor andersoni.
Relative abundance of larval Rocky Mountain wood ticks, Dermacentor andersoni Stiles, in mountainous terrain of western Montana was measured by release and recapture of radiolabeled ticks.Expand