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anaplasma marginale infections in american bison: experimental infection and serologic study.anaplasma marginale was experimentally transmitted from cattle to bison and back to cattle. of the 2 splenectomized and 1 intact american bison calves (bison bison) inoculated with a north texas a marginale stabilate, 1 splenectomized and 1 intact bison exhibited clinical signs of anaplasmosis. active parasitemias in these bison were observed along with positive reactions in the rapid card agglutination and complement fixation tests. blood from the infected bison produced disease in splenectomiz ...19853994109
serologic survey for infectious pathogens in free-ranging american bison.from november 1991 through march 1992, we evaluated 101 free-ranging american bison (bison bison) from yellowstone national park, wyoming (usa) for exposure to infectious organisms that commonly infect cattle. no titers were detected for bluetongue virus, bovine leukemia virus, or campylobacter fetus in these 101 bison. detectable antibodies occurred against anaplasma marginale (eight of 76, 11%), bovine respiratory syncytial virus (31 of 101, 31%), bovine viral diarrhea (31 of 101, 31%), bovine ...19979131564
characterization of anaplasma marginale isolated from north american bison.anaplasma marginale (rickettsiales: anaplasmataceae), a tick-borne pathogen of cattle, is endemic in tropical and subtropical regions of the world. although serologic tests have identified american bison, bison bison, as being infected with a. marginale, the present study was undertaken to confirm a. marginale infection and to characterize isolates obtained from naturally infected bison in the united states and canada. major surface protein (msp1a and msp4) sequences of bison isolates were chara ...200312902301
a canadian bison isolate of anaplasma marginale (rickettsiales: anaplasmataceae) is not transmissible by dermacentor andersoni (acari: ixodidae), whereas ticks from two canadian d. andersoni populations are competent vectors of a u.s. strain.anaplasma marginale theiler is a tick-borne rickettsial pathogen of cattle with a global distribution in both temperate and tropical regions. the pathogen is endemic in regions within the united states, whereas the canadian cattle population is considered to be free ofa. marginale. farmed bison, bison bison l., in central saskatchewan have been found to be infected with a. marginale; however, there is no evidence of transmission from bison to cattle. we tested a saskatchewan bison isolate of a. ...200617017236
recent studies on the characterization of anaplasma marginale isolated from north american bison.anaplasma marginale (rickettsiales: anaplasmataceae), a tick-borne pathogen of cattle, is endemic in tropical and subtropical regions of the world. many geographic isolates of a. marginale occur worldwide that have been identified by major surface protein (msp) 1a, which varies in sequence and molecular weight owing to different numbers of tandem 28-29 amino acid repeats. although serologic tests have identified american bison, bison bison, as being infected with a. marginale, the present studie ...200415604478
experimental anaplasmosis in american bison: persistence of infections of anaplasma marginale and non-susceptibility to a. ovis.blood collected 314 and 496 days after experimentally infecting splenectomized and spleen-intact american bison (bison bison) with anaplasma marginale was infective for splenectomized bovine steers. the pathogenesis was identical to that seen in bovine studies using bovine blood inoculations. a splenectomized bison remained normal clinically, hematologically and serologically for 10 mo after repeated inoculation of ovine blood infected with a. ovis.19863712642
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