West Nile virus: pending crisis for greater sage‐grouse

Naugle, David E.; Aldridge, Cameron L.; Walker, Brett L.; Cornish, Todd E.; Moynahan, Brendan J.; Holloran, Matt; Brown, Katelyn; Johnson, Gregory D.; Schmidtmann, E. T.; Mayer, Richard T.; Kato, Cecilia Y.; Matchett, Marc R.; Christiansen, Thomas J.; Cook, Walter E.; Creekmore, Terry E.; Falise, Roxanne D.; Rinkes, E. Thomas; Boyce, Mark S.

doi:10.1111/j.1461-0248.2004.00631.x

Cited by 122 publications

(93 citation statements)

References 36 publications

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“…During 2003, telemetry studies on sage-grouse revealed unusual mortality of marked birds. Necropsies revealed that these clusters of mortality were attributable to West Nile virus (WNV) infection (Naugle et al, 2004). These observations and the spread of WNV across the continent have raised additional concerns among wildlife managers relative to the well-being of sage-grouse populations.…”

Section: Introductionmentioning

confidence: 99%

Susceptibility of Greater Sage-Grouse to Experimental Infection With West Nile Virus

Clark

Hall

McLean

et al. 2006

Journal of Wildlife Diseases

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ABSTRACT:Populations of greater sage-grouse (Centrocercus urophasianus) have declined 45-80% in North America since 1950. Although much of this decline has been attributed to habitat loss, recent field studies have indicated that West Nile virus (WNV) has had a significant negative impact on local populations of grouse. We confirm the susceptibility of greater sage-grouse to WNV infection in laboratory experimental studies. Grouse were challenged by subcutaneous injection of WNV (10 3.2 plaque-forming units [PFUs]). All grouse died within 6 days of infection. The Kaplan-Meier estimate for 50% survival was 4.5 days. Mean peak viremia for nonvaccinated birds was 10 6.4 PFUs/ml (610 0.2 PFUs/ml, standard error of the mean [SEM]). Virus was shed cloacally and orally. Four of the five vaccinated grouse died, but survival time was increased (50% survival59.5 days), with 1 grouse surviving to the end-point of the experiment (14 days) with no signs of illness. Mean peak viremia for the vaccinated birds was 10 2.3 PFUs/ml (610 0.6 PFUs/ml, SEM). Two birds cleared the virus from their blood before death or euthanasia. These data emphasize the high susceptibility of greater sage-grouse to infection with WNV.

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Section: Introductionmentioning

confidence: 99%

Susceptibility of Greater Sage-Grouse to Experimental Infection With West Nile Virus

Clark

Hall

McLean

et al. 2006

Journal of Wildlife Diseases

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“…Risk of greater sage-grouse exposure to WNV may be particularly acute when WNV outbreaks coincide with environmental factors that aggregate birds around remaining water sources (e.g., drought) (D.E. Naugle et al 2004). …”

Section: Virusesmentioning

confidence: 99%

Broad-Scale Assessment of Rangeland Health, Grand Staircase–Escalante National Monument, USA

Miller

2008

Rangeland Ecology & Management

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“…Non-mosquito arthropods might serve as competent WNV vectors. Soft ticks, 29,30 louse flies, 31 and biting midges (Culicoides sonorensis) 32 are known to infect other avian species with WNV. Pelican chicks harbor a wide variety of ectoparasites; most notable are pouch lice or biting lice (Piagetiella peralis).…”

Section: Resultsmentioning

confidence: 99%

West Nile Virus in American White Pelican Chicks: Transmission, Immunity, and Survival

Sovada

Pietz²,

Hofmeister³

et al. 2013

The American Society of Tropical Medicine and Hygiene

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Abstract. West Nile virus (WNV) causes significant mortality of American White Pelican chicks at northern plains colonies. We tested oropharyngeal/cloacal swabs from moribund chicks for shed WNV. Such shedding could enable chick-to-chick transmission and help explain why WNV spreads rapidly in colonies. WNV was detected on swabs from 11% of chicks in 2006 and 52% of chicks in 2007; however, viral titers were low. Before onset of WNV mortality, we tested blood from 3-week-old chicks for antibodies to WNV; 5% of chicks were seropositive, suggesting passive transfer of maternal antibodies. Among near-fledged chicks, 41% tested positive for anti-WNV antibodies, indicating that they survived infection. Among years and colonies, cumulative incidence of WNV in chicks varied from 28% to 81%, whereas the proportion of chicks surviving WNV (i.e., seropositive) was 64-75%. Our data revealed that WNV kills chicks that likely would fledge in the absence of WNV, that infection of chicks is pervasive, and that significant numbers of chicks survive infection.

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West Nile virus: pending crisis for greater sage‐grouse

Cited by 122 publications

References 36 publications

Susceptibility of Greater Sage-Grouse to Experimental Infection With West Nile Virus

Susceptibility of Greater Sage-Grouse to Experimental Infection With West Nile Virus

Broad-Scale Assessment of Rangeland Health, Grand Staircase–Escalante National Monument, USA

West Nile Virus in American White Pelican Chicks: Transmission, Immunity, and Survival

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