| status of brucellosis in free-ranging elk and bison in wyoming. | brucella abortus is the causative agent of brucellosis, a disease enzootic in populations of free-ranging elk (cervus elaphus) and bison (bison bison) in the greater yellowstone ecosystem, usa. we define the distribution of the disease in elk throughout wyoming, usa, using three epidemiologic/geographic classifications based on winter-foraging opportunity. antibody prevalence for >3,300 yearling and adult, female elk, sampled from supplemental feedgrounds in western wyoming, usa, since 1985, was ... | 2010 | 20688637 |
| probable causes of increasing brucellosis in free-ranging elk of the greater yellowstone ecosystem. | while many wildlife species are threatened, some populations have recovered from previous overexploitation, and data linking these population increases with disease dynamics are limited. we present data suggesting that free-ranging elk (cervus elaphus) are a maintenance host for brucella abortus in new areas of the greater yellowstone ecosystem (gye). brucellosis seroprevalence in free-ranging elk increased from 0-7% in 1991-1992 to 8-20% in 2006-2007 in four of six herd units around the gye. th ... | 2010 | 20349847 |
| dna genotyping suggests that recent brucellosis outbreaks in the greater yellowstone area originated from elk. | identifying the source of infectious disease outbreaks is difficult, especially for pathogens that infect multiple wildlife species. brucella spp. are among the most problematic zoonotic agents worldwide, and they are notoriously difficult to detect and identify. we genotyped 10 variable number of tandem repeat (vntr) dna loci in 56 brucella abortus isolates from bison (bos bison), elk (cervus elaphus), and cattle (bos taurus) to test the wildlife species most likely to be the origin of recent o ... | 2009 | 19901392 |
| effects of management, behavior, and scavenging on risk of brucellosis transmission in elk of western wyoming. | brucellosis is endemic in elk (cervus elaphus nelsoni) using winter feedgrounds of western wyoming, usa presumably because of increased animal density, duration of attendance, and subsequent contact with aborted fetuses. however, previous research addressed antibody prevalence rather than more direct measures of transmission and did not account for elk behavior or scavenging in transmission risk. throughout march and early april 2005-07, we monitored 48 sets of culture-negative, pseudoaborted el ... | 2009 | 19395749 |
| brucellosis in elk of eastern idaho. | brucellosis occurs in free-ranging elk (cervus elaphus) and bison (bison bison) in the greater yellowstone area, which includes portions of idaho, wyoming, and montana. brucella abortus was first detected in elk in idaho in 1998, and from 1998 to 2002, serologic surveillance of hunter-killed elk was conducted in northeastern and southeastern idaho. prevalence of antibodies in these elk varied annually, but averaged between 2% and 3%. elk were also trapped in northeastern idaho from 1998-2002 and ... | 2006 | 16870849 |
| brucellosis in captive rocky mountain bighorn sheep (ovis canadensis) caused by brucella abortus biovar 4. | nine (four female, five male) captive adult rocky mountain bighorn sheep (ovis canadensis) contracted brucellosis caused by brucella abortus biovar 4 as a result of natural exposure to an aborted elk (cervus elaphus) fetus. clinical signs of infection were orchitis and epididymitis in males and lymphadenitis and placentitis with abortion in females. gross pathologic findings included enlargement of the testes or epididymides, or both, and yellow caseous abscesses and pyogranulomas of the same. b ... | 2004 | 15362833 |
| brucellosis in elk i. serologic and bacteriologic survey in wyoming. | incidence of brucellosis in elk (cervus canadensis) on two winter feedgrounds in wyoming was examined over a 5-year period by testing serum samples using the standard plate agglutination (spt) buffered brucella antigen (bba), rivanol (riv) and complement fixation (cft) tests. thirty-one percent of 1,165 elk were positive by defined criteria. considering each test individually, only 29% (106) of 370 positive sera would have been classified as reactors by the spt, 83% (307) by the bba test and 86% ... | 1978 | 416232 |
| identification of brucella abortus genes in elk (cervus elaphus) using in vivo-induced antigen technology (iviat) reveals novel markers of infection. | elk in the greater yellowstone area are a major reservoir for brucellosis, which represents an obstacle to eradication of the disease in domestic livestock. furthermore, immune responses to brucella abortus infection in the wild host are not well-understood. in this regard, in vivo-induced antigen technology (iviat) was employed to identify novel b. abortus antigens expressed during infection in elk. sera collected from sero-positive wyoming elk were pooled and absorbed against in vitro-grown cu ... | 2010 | 19914012 |
| survey of free-ranging elk from wyoming and montana for selected pathogens. | from december 1991 through january 1995, a disease survey was conducted on herds of free-ranging, hunter-killed elk (cervus elaphus nelsoni) from three areas in proximity to yellowstone national park (ynp), wyoming (usa), after tuberculosis caused by mycobacterium bovis was discovered in a captive herd of elk in the area. complete or partial sets of specimens from 289 elk collected between december 1991 and january 1993 were examined histologically; no mycobacterial lesions were observed. lesion ... | 1997 | 9131561 |