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Article ; Online: Food availability leads to more connected contact networks among peridomestic zoonotic reservoir hosts

Amy J. Kuenzi / Angela D. Luis

Royal Society Open Science, Vol 10, Iss

2023 Volume 11

Abstract: The North American deermouse (Peromyscus maniculatus) is a reservoir host for many zoonotic pathogens. Deermice have been well studied, but few studies have attempted to understand social interactions within the species despite these interactions being ... ...

Abstract	The North American deermouse (Peromyscus maniculatus) is a reservoir host for many zoonotic pathogens. Deermice have been well studied, but few studies have attempted to understand social interactions within the species despite these interactions being key to understanding disease transmission. We performed an experiment to determine if supplemental food or nesting material affected social interactions of deermice and tested if interactions increased with increasing population density. We constructed three simulated buildings that received one of three treatments: food, nesting material, or control. Mice were tagged with passive integrated transponder (PIT) tags, and their movement in and out of buildings was monitored with PIT tag readers. PIT tag readings were used to create contact networks, assuming a contact if two deermice were in the same building at the same time. We found that buildings with food led to contact networks that were approximately 10 times more connected than buildings with nesting material or control buildings. We also saw a significant effect of population density on the average number of contacts per individual. These results suggest that food supplementation which is common in peridomestic settings, can significantly increase contacts between reservoir hosts, potentially leading to increased transmission of zoonotic viruses within the reservoir host and from reservoir hosts to humans.
Keywords	social network analysis ; supplemental feeding ; resource provisioning ; Peromyscus maniculatus ; disease transmission ; Science ; Q
Subject code	590
Language	English
Publishing date	2023-11-01T00:00:00Z
Publisher	The Royal Society
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Heterospecific competitors and seasonality can affect host physiology and behavior

Andreas Eleftheriou / Amy J. Kuenzi / Angela D. Luis

Ecosphere, Vol 12, Iss 6, Pp n/a-n/a (2021)

key factors in disease transmission

2021

Abstract: Abstract Ecological and environmental factors can influence the transmission of infectious diseases. They can accomplish this via effects on host susceptibility and exposure to infection, which are governed by host physiology and behavior, respectively. ... ...

Abstract	Abstract Ecological and environmental factors can influence the transmission of infectious diseases. They can accomplish this via effects on host susceptibility and exposure to infection, which are governed by host physiology and behavior, respectively. To better inform disease control, more information is needed about how extrinsic factors affect physiological and behavioral processes that determine transmission. We investigated how heterospecific competitors and seasonality may influence host susceptibility and intraspecific contact rates using a directly transmitted disease system, the North American deer mouse (Peromyscus maniculatus)—Sin Nombre hantavirus (SNV) system. In grasslands of western Montana, USA, deer mice compete with dominant voles (Microtus spp.) and shrews (Sorex spp.) and experience a seasonal temperate climate. Higher SNV transmission occurs primarily during spring/summer, when changes in physiology and behavior may serve as influential contributors. We hypothesized that (1) voles, and to a lesser extent shrews, will induce chronic stress, suppress immunity, and may change contact rates of deer mice; and (2) during spring/summer, deer mice may experience chronic stress, suppressed immunity, and higher contact rates, which may help explain the reported seasonality in SNV transmission. Over two years, we trapped small mammals at four grids in western Montana. Deer mice were sampled for feces and blood and evaluated for scar numbers, demography, and body condition scores (BCSs). We evaluated stress physiology with fecal corticosterone metabolites (FCMs), neutrophil/lymphocyte (N/L) ratios and BCSs, immunity with white blood cell (WBC) counts, and contact rates with scar numbers. We found that shrew density was negatively associated with stress response FCMs, suggestive of chronic stress. Additionally, although complex interactions existed, shrew and vole densities were negatively associated with BCSs, but differentially with scar numbers. N/L ratios were higher in spring/summer, whereas WBC ...
Keywords	animal behavior ; fecal glucocorticoid metabolites ; generalized linear regression trees ; rodent‐borne zoonosis ; wildlife infectious disease ; Ecology ; QH540-549.5
Subject code	630
Language	English
Publishing date	2021-06-01T00:00:00Z
Publisher	Wiley
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Interspecific comparison of hantavirus prevalence in peromyscus populations from a fragmented agro-ecosystem in indiana, usa

Berl, Jacob L / Amy J. Kuenzi / Elizabeth A. Flaherty / Robert K. Swihart

Journal of wildlife diseases. 2018 Jan., v. 54, no. 1

2018

Abstract: Comparatively little is known about hantavirus prevalence within rodent populations from the Midwestern US, where two species of native mice, the prairie deer mouse (Peromyscus maniculatus bairdii) and the white-footed mouse (Peromyscus leucopus ... ...

Abstract	: Comparatively little is known about hantavirus prevalence within rodent populations from the Midwestern US, where two species of native mice, the prairie deer mouse (Peromyscus maniculatus bairdii) and the white-footed mouse (Peromyscus leucopus noveboracensis), are dominant members of rodent communities. We sampled both species in central Indiana and tested individuals for presence of hantavirus antibodies to determine whether seroprevalence (percent of individuals with antibodies reactive to Sin Nombre virus antigen) differed between species, or among different habitat types within fragmented agro-ecosystems. Prevalence of hantavirus antibodies varied significantly between species, with seroprevalence in prairie deer mice (21.0%) being nearly four times higher than in white-footed mice (5.5%). Seroprevalence was almost eight times higher within the interior of row-crop fields (37.7%) occupied solely by prairie deer mouse populations, relative to field edges (5.2%) or adjacent forest habitat (6.1%). In the fragmented Midwestern agro-ecosystem of this study, prairie deer mice appear to be the dominant hantavirus reservoir, with particularly high seroprevalence in populations within the interior of row-crop fields.
Keywords	agroecosystems ; antibodies ; edge effects ; habitats ; mice ; Peromyscus leucopus ; Peromyscus maniculatus ; rowcrops ; seroprevalence ; Sin Nombre virus ; viral antigens ; wildlife diseases ; Indiana
Language	English
Dates of publication	2018-01
Size	p. 147-150.
Publishing place	Wildife Disease Association
Document type	Article
ZDB-ID	410709-3
ISSN	1943-3700 ; 0090-3558
ISSN (online)	1943-3700
ISSN	0090-3558
DOI	10.7589/2017-02-022
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Increased Detection of Sin Nombre Hantavirus RNA in Antibody-Positive Deer Mice from Montana, USA

James N. Mills / Amy J. Kuenzi / Jonathan S. Towner / Karoun H. Bagamian

Viruses, Vol 5, Iss 9, Pp 2320-

Evidence of Male Bias in RNA Viremia

2013 Volume 2328

Abstract: Hantaviruses are widespread emergent zoonotic agents that cause unapparent or limited disease in their rodent hosts, yet cause acute, often fatal pulmonary or renal infections in humans. Previous laboratory experiments with rodent reservoir hosts ... ...

Abstract	Hantaviruses are widespread emergent zoonotic agents that cause unapparent or limited disease in their rodent hosts, yet cause acute, often fatal pulmonary or renal infections in humans. Previous laboratory experiments with rodent reservoir hosts indicate that hantaviruses can be cleared from host blood early in the infection cycle, while sequestered long term in various host organs. Field studies of North American deer mice (Peromyscus maniculatus), the natural reservoir of Sin Nombre hantavirus, have shown that viral RNA can be transiently detected well past the early acute infection stage, but only in the minority of infected mice. Here, using a non-degenerate RT-PCR assay optimized for SNV strains known to circulate in Montana, USA, we show that viral RNA can be repeatedly detected on a monthly basis in up to 75% of antibody positive deer mice for periods up to 3–6 months. More importantly, our data show that antibody positive male deer mice are more than twice as likely to have detectable SNV RNA in their blood as antibody positive females, suggesting that SNV-infected male deer mice are more likely to shed virus and for longer periods of time.
Keywords	Sin Nombre hantavirus ; deer mouse ; Peromyscus maniculatus ; transmission ; viral RNA ; RT-PCR ; Microbiology ; QR1-502 ; Science ; Q ; DOAJ:Microbiology ; DOAJ:Biology ; DOAJ:Biology and Life Sciences
Language	English
Publishing date	2013-09-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Population density and seasonality effects on Sin Nombre virus transmission in North American deermice (Peromyscus maniculatus) in outdoor enclosures.

Karoun H Bagamian / Richard J Douglass / Arlene Alvarado / Amy J Kuenzi / Brian R Amman / Lance A Waller / James N Mills

PLoS ONE, Vol 7, Iss 6, p e

2012 Volume 37254

Abstract: Surveys of wildlife host-pathogen systems often document clear seasonal variation in transmission; conclusions concerning the relationship between host population density and transmission vary. In the field, effects of seasonality and population density ... ...

Abstract	Surveys of wildlife host-pathogen systems often document clear seasonal variation in transmission; conclusions concerning the relationship between host population density and transmission vary. In the field, effects of seasonality and population density on natural disease cycles are challenging to measure independently, but laboratory experiments may poorly reflect what happens in nature. Outdoor manipulative experiments are an alternative that controls for some variables in a relatively natural environment. Using outdoor enclosures, we tested effects of North American deermouse (Peromyscus maniculatus) population density and season on transmission dynamics of Sin Nombre hantavirus. In early summer, mid-summer, late summer, and fall 2007-2008, predetermined numbers of infected and uninfected adult wild deermice were released into enclosures and trapped weekly or bi-weekly. We documented 18 transmission events and observed significant seasonal effects on transmission, wounding frequency, and host breeding condition. Apparent differences in transmission incidence or wounding frequency between high- and low-density treatments were not statistically significant. However, high host density was associated with a lower proportion of males with scrotal testes. Seasonality may have a stronger influence on disease transmission dynamics than host population density, and density effects cannot be considered independent of seasonality.
Keywords	Medicine ; R ; Science ; Q
Subject code	630
Language	English
Publishing date	2012-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Sin Nombre Virus in Deer Mice Captured Inside Homes, Southwestern Montana

Amy J. Kuenzi / Richard J. Douglass / Clifford W. Bond

Emerging Infectious Diseases, Vol 6, Iss 4, Pp 386-

2000 Volume 388

Abstract: From 1996 through 1999, 35 deer mice (Peromyscus maniculatus) were captured in 25 urban and suburban homes in southwestern Montana. Mice were captured throughout the year except for January; seven mice (20%) from seven (28%) of the homes were ... ...

Abstract	From 1996 through 1999, 35 deer mice (Peromyscus maniculatus) were captured in 25 urban and suburban homes in southwestern Montana. Mice were captured throughout the year except for January; seven mice (20%) from seven (28%) of the homes were seropositive for Sin Nombre virus. The infected mice were mostly adult males captured in the spring and fall.
Keywords	sin nombre virus ; deer mice ; Montana ; hantavirus pulmonary syndrome ; HPS ; hantavirus ; Medicine ; R ; Infectious and parasitic diseases ; RC109-216
Language	English
Publishing date	2000-08-01T00:00:00Z
Publisher	Centers for Disease Control and Prevention
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Transmission ecology of Sin Nombre hantavirus in naturally infected North American deermouse populations in outdoor enclosures.

Karoun H Bagamian / Jonathan S Towner / Amy J Kuenzi / Richard J Douglass / Pierre E Rollin / Lance A Waller / James N Mills

PLoS ONE, Vol 7, Iss 10, p e

2012 Volume 47731

Abstract: Sin Nombre hantavirus (SNV), hosted by the North American deermouse (Peromyscus maniculatus), causes hantavirus pulmonary syndrome (HPS) in North America. Most transmission studies in the host were conducted under artificial conditions, or extrapolated ... ...

Abstract	Sin Nombre hantavirus (SNV), hosted by the North American deermouse (Peromyscus maniculatus), causes hantavirus pulmonary syndrome (HPS) in North America. Most transmission studies in the host were conducted under artificial conditions, or extrapolated information from mark-recapture data. Previous studies using experimentally infected deermice were unable to demonstrate SNV transmission. We explored SNV transmission in outdoor enclosures using naturally infected deermice. Deermice acquiring SNV in enclosures had detectable viral RNA in blood throughout the acute phase of infection and acquired significantly more new wounds (indicating aggressive encounters) than uninfected deermice. Naturally-infected wild deermice had a highly variable antibody response to infection, and levels of viral RNA sustained in blood varied as much as 100-fold, even in individuals infected with identical strains of virus. Deermice that infected other susceptible individuals tended to have a higher viral RNA load than those that did not infect other deermice. Our study is a first step in exploring the transmission ecology of SNV infection in deermice and provides new knowledge about the factors contributing to the increase of the prevalence of a zoonotic pathogen in its reservoir host and to changes in the risk of HPS to human populations. The techniques pioneered in this study have implications for a wide range of zoonotic disease studies.
Keywords	Medicine ; R ; Science ; Q
Subject code	630
Language	English
Publishing date	2012-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Removing Deer Mice from Buildings and the Risk for Human Exposure to Sin Nombre Virus

Richard J. Douglass / Amy J. Kuenzi / Courtney Y. Williams / Samuel J. Douglass / James N. Mills

Emerging Infectious Diseases, Vol 9, Iss 3, Pp 390-

2003 Volume 392

Abstract: Trapping and removing deer mice from ranch buildings resulted in an increased number of mice, including Sin Nombre virus antibody–positive mice, entering ranch buildings. Mouse removal without mouse proofing will not reduce and may even increase human ... ...

Abstract	Trapping and removing deer mice from ranch buildings resulted in an increased number of mice, including Sin Nombre virus antibody–positive mice, entering ranch buildings. Mouse removal without mouse proofing will not reduce and may even increase human exposure to Sin Nombre hantavirus.
Keywords	United States ; Medicine ; R ; Infectious and parasitic diseases ; RC109-216
Language	English
Publishing date	2003-03-01T00:00:00Z
Publisher	Centers for Disease Control and Prevention
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: A Longitudinal Study of Sin Nombre Virus Prevalence in Rodents, Southeastern Arizona

Amy J. Kuenzi / Michael L. Morrison / Don E. Swann / Paul C. Hardy / Giselle T. Downard

Emerging Infectious Diseases, Vol 5, Iss 1, Pp 113-

1999 Volume 117

Abstract: We determined the prevalence of Sin Nombre virus antibodies in small mammals in southeastern Arizona. Of 1,234 rodents (from 13 species) captured each month from May through December 1995, only mice in the genus Peromyscus were seropositive. Antibody ... ...

Abstract	We determined the prevalence of Sin Nombre virus antibodies in small mammals in southeastern Arizona. Of 1,234 rodents (from 13 species) captured each month from May through December 1995, only mice in the genus Peromyscus were seropositive. Antibody prevalence was 14.3% in 21 white-footed mice (P. leucopus), 13.3% in 98 brush mice (P. boylii), 0.8% in 118 cactus mice (P. eremicus), and 0% in 2 deer mice (P. maniculatus). Most antibody-positive mice were adult male Peromyscus captured close to one another early in the study. Population dynamics of brush mice suggest a correlation between population size and hantavirus-antibody prevalence.
Keywords	United States ; Medicine ; R ; Infectious and parasitic diseases ; RC109-216
Language	English
Publishing date	1999-02-01T00:00:00Z
Publisher	Centers for Disease Control and Prevention
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Spatial clustering of murid rodents infected with hantaviruses: implications from metaâanalyses

Root, J. Jeffrey / Kenneth R. Wilson / Charles H. Calisher / Kent D. Wagoner / Ken D. Abbott / Terry L. Yates / Amy J. Kuenzi / Michael L. Morrison / James N. Mills / Barry J. Beaty

Ecological applications. 2005 Apr., v. 15, no. 2

2005

Abstract: We applied a rigorous, quantitative methodology to the analysis of localâscale spatial clustering of multiple murid mice (brush mice, Peromyscus boylii; deer mice, P. maniculatus; piÃ±on mice, P. truei; western harvest mice, Reithrodontomys megalotis) ... ...

Abstract	We applied a rigorous, quantitative methodology to the analysis of localâscale spatial clustering of multiple murid mice (brush mice, Peromyscus boylii; deer mice, P. maniculatus; piÃ±on mice, P. truei; western harvest mice, Reithrodontomys megalotis) infected or uninfected with hantaviruses. Rodents were sampled longitudinally from 1994 to 2001 on 23 trapping webs at 10 locations in the southwestern United States. This study provided an opportunity to apply metaâanalysis techniques to an important ecological question. There were sufficient captures by species on 199 occasions (three consecutive nights) to compare general use of space using multiâresponse permutation procedures (MRPP). The MRPP results were then used in metaâanalyses by species to determine if overall effects of spatial clustering of hantavirusâinfected mice as well as categorical effects (elevation, season, site, and state) were present. Based on MRPP analyses, overall spatial clustering of hantavirusâinfected mice was most pronounced for brush mice, followed by the deer mouse. Metaâanalyses indicated significant overall effects of spatial clustering and varying categorical effects (elevation, season, site, state) of infected mice for each species compared. The overlapping space use by rodents might be an important factor affecting the local transmission of several hantaviruses.
Keywords	Hantavirus ; Peromyscus ; Reithrodontomys ; meta-analysis ; mice ; trapping ; Southwestern United States
Language	English
Dates of publication	2005-04
Size	p. 565-574.
Publishing place	Ecological Society of America
Document type	Article
Note	JOURNAL ARTICLE
ZDB-ID	1074505-1
ISSN	1939-5582 ; 1051-0761
ISSN (online)	1939-5582
ISSN	1051-0761
DOI	10.1890/03-5293
Database	NAL-Catalogue (AGRICOLA)

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