Publications

cyclodiene insecticide, dde, ddt, arsenic, and mercury contamination of big brown bats (eptesicus fuscus) foraging at a colorado superfund site.	rocky mountain arsenal (rma) national wildlife area, near denver, colorado, is a superfund site contaminated by past military and industrial uses, including pesticide manufacturing. from an ecosystem standpoint, the most critical contaminants at rma are certain cyclodiene insecticides and metabolites, p,p'-dde, p,p'-ddt, arsenic, and mercury. bats are important ecosystem components that can be impacted by persistent contaminants because of their position in the food chain and their potential lon ...	2001	11116346
exposure of hooded capuchin monkeys (cebus apella cay) to a rabid bat at a zoological park.	on 27 may 1999, a big brown bat (eptesicus fuscus) was discovered on an island exhibit at the denver zoo that contained a troop of 15 hooded capuchin monkeys (cebus apella cay). the monkeys were attacking the bat when it was discovered. the bat was collected and humanely euthanatized without direct handling and submitted to the colorado department of public health and environment virology laboratory for rabies evaluation. the monkeys had not been vaccinated against rabies virus. the next day, th ...	2001	12790408
rabies in a captive colony of big brown bats (eptesicus fuscus).	our research has focused on the ecology of commensal populations of big brown bats (eptesicus fuscus) in fort collins, colorado (usa), in relation to rabies virus (rv) transmission. we captured 35 big brown bats (eptesicus fuscus) in late summer 2001 and held them captive for 4.8 mo. the bats were initially placed in an indoor cage for 1 mo then segregated into groups of two to six per cage. two of the bats succumbed to rabies virus (rv) within the first month of capture. despite group housing, ...	2004	15465706
anesthesia and blood sampling of wild big brown bats (eptesicus fuscus) with an assessment of impacts on survival.	we anesthetized and blood sampled wild big brown bats (eptesicus fuscus) in fort collins, colorado (usa) in 2001 and 2002 and assessed effects on survival. inhalant anesthesia was delivered into a specially designed restraint and inhalation capsule that minimized handling and bite exposures. bats were immobilized an average of 9.1+/-5.1 (sd) min (range 1-71, n=876); blood sample volumes averaged 58+/-12 microl (range 13-126, n=718). we randomly selected control (subject to multiple procedures be ...	2005	15827214
genetic divergence of rabies viruses from bat species of colorado, usa.	molecular epidemiological studies have linked many cryptic human rabies cases in the united states with exposure to rabies virus (rv) variants associated with insectivorous bats. in colorado, bats accounted for 98% of all reported animal rabies cases between 1977 and 1996. the genetic divergence of rv was investigated in bat and terrestrial animal specimens that were submitted for rabies diagnosis to the colorado department of public health and environment (cdphe), colorado, usa. rv isolates fro ...	2005	16417429
ectoparasites in an urban population of big brown bats (eptesicus fuscus) in colorado.	ectoparasites of an urban population of big brown bats (eptesicus fuscus) in fort collins, colorado, were investigated during summers 2002, 2003, and 2004. eleven species of ectoparasites were found (the macronyssid mite steatonyssus occidentalis, the wing mite spinturnix bakeri, the myobiid mites acanthophthirius caudata and pteracarus aculeus, the chirodiscid mite alabidocarpus eptesicus, the demodicid mite demodex sp., the chigger leptotrombidium myotis, the soft tick carios kelleyi, the batf ...	2007	17626343
lack of association between ectoparasite intensities and rabies virus neutralizing antibody seroprevalence in wild big brown bats (eptesicus fuscus), fort collins, colorado.	recently, bat ectoparasites have been demonstrated to harbor pathogens of potential importance to humans. we evaluated antirabies antibody seroprevalence and the presence of ectoparasites in big brown bats (eptesicus fuscus) sampled in 2002 and 2003 in colorado to investigate if an association existed between ectoparasite intensity and exposure to rabies virus (rv). we used logistic regression and akaike's information criteria adjusted for sample size (aicc) in a post-hoc analysis to investigate ...	2007	17979542
factors influencing movement probabilities of big brown bats (eptesicus fuscus) in buildings.	we investigated movements of female big brown bats (eptesicus fuscus) roosting in maternity colonies in buildings in fort collins, colorado (usa), during the summers of 2002, 2003, and 2005. this behavior can be of public health concern where bats that may carry diseases (e.g., rabies) move among buildings occupied by people. we used passive integrated transponders (pit tags) to mark individual bats and hoop pit readers at emergence points to passively monitor the use of building roosts by marke ...	2007	17489265
an analysis of correspondence between unique rabies virus variants and divergent big brown bat (eptesicus fuscus) mitochondrial dna lineages.	the literature supports that unique rabies virus (rabv) variants are often compartmentalized in different species of bats. in colorado, two divergent mtdna lineages of big brown bats (eptesicus fuscus) co-occur. rabv associated with this species also segregates into two clades. we hypothesized that unique rabv variants might be associated with mtdna lineages of colorado big brown bats. dna was extracted from brain tissue of rabid big brown bats, the nd2 gene was amplified to determine mtdna line ...	2008	18398562
host and viral ecology determine bat rabies seasonality and maintenance.	rabies is an acute viral infection that is typically fatal. most rabies modeling has focused on disease dynamics and control within terrestrial mammals (e.g., raccoons and foxes). as such, rabies in bats has been largely neglected until recently. because bats have been implicated as natural reservoirs for several emerging zoonotic viruses, including sars-like corona viruses, henipaviruses, and lyssaviruses, understanding how pathogens are maintained within a population becomes vital. unfortunate ...	2011	21646516
prevalence of neutralizing antibodies to rabies virus in serum of seven species of insectivorous bats from colorado and new mexico, united states.	we determined the presence of rabies-virus-neutralizing antibodies (rvna) in serum of 721 insectivorous bats of seven species captured, sampled, and released in colorado and new mexico, united states in 2003-2005. a subsample of 160 bats was tested for rabies-virus rna in saliva. we sampled little brown bats (myotis lucifugus) at two maternity roosts in larimer county, colorado; big brown bats (eptesicus fuscus) at three maternity roosts in morgan county, colorado; and big brown bats at five mat ...	2013	23568912
variability in seroprevalence of rabies virus neutralizing antibodies and associated factors in a colorado population of big brown bats (eptesicus fuscus).	in 2001-2005 we sampled permanently marked big brown bats (eptesicus fuscus) at summer roosts in buildings at fort collins, colorado, for rabies virus neutralizing antibodies (rvna). seroprevalence was higher in adult females (17.9%, n = 2,332) than males (9.4%, n = 128; p = 0.007) or volant juveniles (10.2%, n = 738; p<0.0001). seroprevalence was lowest in a drought year with local insecticide use and highest in the year with normal conditions, suggesting that environmental stress may suppress ...	2014	24465996