Publications

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dynamics of plague in a gunnison's prairie dog colony complex from new mexico.a plague (yersinia pestis) epizootic spread through gunnison's prairie dogs (cynomys gunnisoni), and possibly other rodent species, in the moreno valley in north-central new mexico between winter 1984-1985 and autumn 1987. we observed the progress of the epizootic and subsequent population recovery at four prairie dog towns within the valley during this period. at two towns (midlake and val verde) the prairie dogs were marked prior to the epizootic. at two additional towns (vega and south entran ...19979391954
flea abundance, diversity, and plague in gunnison's prairie dogs (cynomys gunnisoni) and their burrows in montane grasslands in northern new mexico.plague, a flea-transmitted infectious disease caused by the bacterium yersinia pestis, is a primary threat to the persistence of prairie dog populations (cynomys spp.). we conducted a 3-yr survey (2004-2006) of fleas from gunnison's prairie dogs (cynomys gunnisoni) and their burrows in montane grasslands in valles caldera national preserve in new mexico. our objectives were to describe flea communities and identify flea and rodent species important to the maintenance of plague. we live-trapped p ...201020688629
colorado animal-based plague surveillance systems: relationships between targeted animal species and prediction efficacy of areas at risk for humans.human plague risks (yersinia pestis infection) are greatest when epizootics cause high mortality among this bacterium's natural rodent hosts. therefore, health departments in plague-endemic areas commonly establish animal-based surveillance programs to monitor y. pestis infection among plague hosts and vectors. the primary objectives of our study were to determine whether passive animal-based plague surveillance samples collected in colorado from 1991 to 2005 were sampled from high human plague ...200920836802
population differences in host immune factors may influence survival of gunnison's prairie dogs (cynomys gunnisoni) during plague outbreaks.over the past 40 yr, epizootics of plague (yersinia pestis) in northern arizona have reduced populations of the gunnison's prairie dog (cynomys gunnisoni), with the exception of a large population found in the aubrey valley (av). to examine potential mechanisms accounting for their survival, we collected prairie dog serum samples in 2005-2006 from av and a neighboring population near seligman (se), arizona. we quantified gene expression at 58 diverse immune proteins using a multiplexed enzyme-li ...201122102668
genetic variation at the mhc drb1 locus is similar across gunnison's prairie dog (cynomys gunnisoni) colonies regardless of plague history.yersinia pestis was introduced to north america around 1900 and leads to nearly 100% mortality in prairie dog (cynomys spp.) colonies during epizootic events, which suggests this pathogen may exert a strong selective force. we characterized genetic diversity at an mhc class ii locus (drb1) in gunnison's prairie dog (c. gunnisoni) and quantified population genetic structure at the drb1 versus 12 microsatellite loci in three large arizona colonies. two colonies, seligman (se) and espee ranch (es), ...201627066243
age at vaccination may influence response to sylvatic plague vaccine (spv) in gunnison's prairie dogs (cynomys gunnisoni).gunnison's prairie dogs (cynomys gunnisoni) have been considered at greater risk from yersinia pestis (plague) infection in the montane portion of their range compared to populations at lower elevations, possibly due to factors related to flea transmission of the bacteria or greater host susceptibility. to test the latter hypothesis and determine whether vaccination against plague with an oral sylvatic plague vaccine (spv) improved survival, we captured prairie dogs from a c. g. gunnisoni or "mo ...201525589000
the innate immune response may be important for surviving plague in wild gunnison's prairie dogs.prairie dogs (cynomys spp.) are highly susceptible to yersinia pestis, with ≥99% mortality reported from multiple studies of plague epizootics. a colony of gunnison's prairie dogs (cynomys gunnisoni) in the aubrey valley (av) of northern arizona appears to have survived several regional epizootics of plague, whereas nearby colonies have been severely affected by y. pestis. to examine potential mechanisms accounting for survival in the av colony, we conducted a laboratory y. pestis challenge expe ...201324502719
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