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Oludairo OO, Kwaga JKP, Kabir J, Abdu PA, Gitanjali A, Perrets A, Cibin V, Lettini AA, Aiyedun JO. Ecology and epidemiology of Salmonella spp. isolated from the environment and the roles played by wild animals in their maintenance. INTERNATIONAL JOURNAL OF ONE HEALTH 2023. [DOI: 10.14202/ijoh.2023.1-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Abstract
Salmonella is a ubiquitous organism of public health importance that causes diarrhea and other systemic disease syndromes. The ecology and epidemiology of the organism in addition to the roles played by wild animals are important in understanding its disease. Relevant published peer-reviewed literature was obtained after imputing the study's keywords into the Google search engine. The publications were thereafter saved for the study. The study revealed the ecology of Salmonella is directly related to its epidemiology. These were found to be either positively or negatively influenced by the living and non-living parts of the environment. Free-ranging and captive wild animals can serve as asymptomatic carriers of Salmonella, therefore, help to maintain the cycle of the disease since wildlife serves as reservoir hosts to over 70% of emerging zoonotic diseases. Cockroaches transmit Salmonella through their feces, and body parts and when ingested by birds and animals. The statistically significant over 83% of Salmonella isolation in lizards suggests the reptile could be a source of Salmonella distribution. Snakes, foxes, badgers, rodents, and raccoons have been reported to have Salmonella as a natural component of their gut with the ability to shed the organism often. The high occurrence (>45%) of diverse Salmonella serovars coupled with the fact that some of these animals were handled, kept as pets and consumed by man portends these animals as potential sources of transmission of the organism and the disease. The etiology and epidemiology of Salmonella are overtly affected by several environmental factors which also determine their survival and maintenance. The roles played by wild animals in the relationship, transmission, growth or interaction within and between Salmonella spp., the occurrence, prevalence, and distribution of the organism help maintain the organism in the environment. An understanding of the roles played by the different parts of the environment and wild animals in the ecology and epidemiology of Salmonella can help make informed decisions on the prevention and control of the diseases it causes. This review aimed to investigate the relationship between ecology, epidemiology, and environment, including the roles played by wild animals in the maintenance of the organism and its disease.
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Affiliation(s)
- Oladapo Oyedeji Oludairo
- Department of Veterinary Public Health and Preventive Medicine, University of Ilorin, Ilorin, Nigeria
| | - Jacob K. P. Kwaga
- Department of Veterinary Public Health and Preventive Medicine, Ahmadu Bello University, Zaria, Nigeria
| | - Junaid Kabir
- Department of Veterinary Public Health and Preventive Medicine, Ahmadu Bello University, Zaria, Nigeria
| | - Paul A. Abdu
- Department of Veterinary Medicine, Ahmadu Bello University, Zaria, Nigeria
| | - Arya Gitanjali
- OIE Salmonella Reference Laboratory, National Microbiology Laboratory, Public Health Agency of Canada, Guelph, Ontario, Canada
| | - Ann Perrets
- OIE Salmonella Reference Laboratory, National Microbiology Laboratory, Public Health Agency of Canada, Guelph, Ontario, Canada
| | - Veronica Cibin
- Salmonella Reference Laboratory, Istituto Zooprofilattico Sperimentale delle Venezie Viale dell'Università, Legnaro (PD), Italy
| | - Antonia Anna Lettini
- Salmonella Reference Laboratory, Istituto Zooprofilattico Sperimentale delle Venezie Viale dell'Università, Legnaro (PD), Italy
| | - Julius O. Aiyedun
- Department of Veterinary Public Health and Preventive Medicine, University of Ilorin, Ilorin, Nigeria
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Becker DJ, Eby P, Madden W, Peel AJ, Plowright RK. Ecological conditions predict the intensity of Hendra virus excretion over space and time from bat reservoir hosts. Ecol Lett 2023; 26:23-36. [PMID: 36310377 DOI: 10.1111/ele.14007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 03/09/2022] [Indexed: 12/27/2022]
Abstract
The ecological conditions experienced by wildlife reservoirs affect infection dynamics and thus the distribution of pathogen excreted into the environment. This spatial and temporal distribution of shed pathogen has been hypothesised to shape risks of zoonotic spillover. However, few systems have data on both long-term ecological conditions and pathogen excretion to advance mechanistic understanding and test environmental drivers of spillover risk. We here analyse three years of Hendra virus data from nine Australian flying fox roosts with covariates derived from long-term studies of bat ecology. We show that the magnitude of winter pulses of viral excretion, previously considered idiosyncratic, are most pronounced after recent food shortages and in bat populations displaced to novel habitats. We further show that cumulative pathogen excretion over time is shaped by bat ecology and positively predicts spillover frequency. Our work emphasises the role of reservoir host ecology in shaping pathogen excretion and provides a new approach to estimate spillover risk.
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Affiliation(s)
- Daniel J Becker
- Department of Microbiology and Immunology, Montana State University, Bozeman, Montana, USA.,Department of Biology, University of Oklahoma, Norman, Oklahoma, USA
| | - Peggy Eby
- School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, Australia.,Centre for Planetary Health and Food Security, Griffith University, Queensland, Australia
| | - Wyatt Madden
- Department of Microbiology and Immunology, Montana State University, Bozeman, Montana, USA
| | - Alison J Peel
- Centre for Planetary Health and Food Security, Griffith University, Queensland, Australia
| | - Raina K Plowright
- Department of Microbiology and Immunology, Montana State University, Bozeman, Montana, USA
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Teitelbaum CS, Altizer S, Hall RJ. Habitat Specialization by Wildlife Reduces Pathogen Spread in Urbanizing Landscapes. Am Nat 2021; 199:238-251. [DOI: 10.1086/717655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Claire S. Teitelbaum
- Odum School of Ecology and Center for the Ecology of Infectious Diseases, University of Georgia, Athens, Georgia 30602
| | - Sonia Altizer
- Odum School of Ecology and Center for the Ecology of Infectious Diseases, University of Georgia, Athens, Georgia 30602
| | - Richard J. Hall
- Odum School of Ecology and Center for the Ecology of Infectious Diseases, University of Georgia, Athens, Georgia 30602
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, Georgia 30602
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Murray MH, Hernandez SM, Rozier RS, Kidd AD, Hepinstall-Cymerman J, Curry SE, Yabsley MJ, Adams H, Ellison T, Welch CN, Lipp EK. Site Fidelity is Associated with Food Provisioning and Salmonella in an Urban Wading Bird. ECOHEALTH 2021; 18:345-358. [PMID: 34453242 DOI: 10.1007/s10393-021-01543-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 06/08/2021] [Accepted: 06/30/2021] [Indexed: 06/13/2023]
Abstract
Food provisioning can change wildlife pathogen dynamics by altering host susceptibility via nutrition and/or through shifts in foraging behavior and space use. We used the American white ibis (Eudocimus albus), a wading bird increasingly observed in urban parks, as a model to study synergistic relationships between food provisioning and infection risk across an urban gradient in South Florida. We tested whether Salmonella prevalence was associated with changes in ibis diet (stable isotope analysis), space use (site fidelity via GPS tracking), and local density (flock size). We compared the relative importance of these mechanisms by ranking candidate models using logistic regression. We detected Salmonella in 27% of white ibises (n = 233) sampled at 15 sites. Ibises with diets higher in anthropogenic food exhibited higher site fidelity. Salmonella prevalence was higher at sites where ibises exhibited greater site fidelity and Salmonella was more prevalent in soil and water. Overlap in Salmonella serotypes between ibises and soil or water also was more likely at sites where ibises exhibited higher site fidelity. Our results suggest that repeated use of foraging areas may increase Salmonella exposure for birds if foraging areas are contaminated from animal feces, human waste, or other bacterial sources. Limiting wildlife feeding in parks-perhaps best achieved through understanding the motivations for feeding, education, and enforcement-may reduce health risks for wildlife and the public.
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Affiliation(s)
- Maureen H Murray
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, 30602, USA.
- Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA.
- Urban Wildlife Institute, Lincoln Park Zoo, Chicago, IL, 60615, USA.
| | - Sonia M Hernandez
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, 30602, USA
- Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - R Scott Rozier
- Department of Environmental Health Science, University of Georgia, Athens, GA, 30602, USA
| | - Anjelika D Kidd
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, 30602, USA
| | | | - Shannon E Curry
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, 30602, USA
- Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Michael J Yabsley
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, 30602, USA
- Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Henry Adams
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, 30602, USA
- Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Taylor Ellison
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, 30602, USA
- Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Catharine N Welch
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, 30602, USA
- Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Erin K Lipp
- Department of Environmental Health Science, University of Georgia, Athens, GA, 30602, USA
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Hernandez SM, Maurer JJ, Yabsley MJ, Peters VE, Presotto A, Murray MH, Curry S, Sanchez S, Gerner-Smidt P, Hise K, Huang J, Johnson K, Kwan T, Lipp EK. Free-Living Aquatic Turtles as Sentinels of Salmonella spp. for Water Bodies. Front Vet Sci 2021; 8:674973. [PMID: 34368271 PMCID: PMC8339271 DOI: 10.3389/fvets.2021.674973] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 06/25/2021] [Indexed: 11/13/2022] Open
Abstract
Reptile-associated human salmonellosis cases have increased recently in the United States. It is not uncommon to find healthy chelonians shedding Salmonella enterica. The rate and frequency of bacterial shedding are not fully understood, and most studies have focused on captive vs. free-living chelonians and often in relation to an outbreak. Their ecology and significance as sentinels are important to understanding Salmonella transmission. In 2012-2013, Salmonella prevalence was determined for free-living aquatic turtles in man-made ponds in Clarke and Oconee Counties, in northern Georgia (USA) and the correlation between species, basking ecology, demographics (age/sex), season, or landcover with prevalence was assessed. The genetic relatedness between turtle and archived, human isolates, as well as, other archived animal and water isolates reported from this study area was examined. Salmonella was isolated from 45 of 194 turtles (23.2%, range 14-100%) across six species. Prevalence was higher in juveniles (36%) than adults (20%), higher in females (33%) than males (18%), and higher in bottom-dwelling species (31%; common and loggerhead musk turtles, common snapping turtles) than basking species (15%; sliders, painted turtles). Salmonella prevalence decreased as forest cover, canopy cover, and distance from roads increased. Prevalence was also higher in low-density, residential areas that have 20-49% impervious surface. A total of 9 different serovars of two subspecies were isolated including 3 S. enterica subsp. arizonae and 44 S. enterica subsp. enterica (two turtles had two serotypes isolated from each). Among the S. enterica serovars, Montevideo (n = 13) and Rubislaw (n = 11) were predominant. Salmonella serovars Muenchen, Newport, Mississippi, Inverness, Brazil, and Paratyphi B. var L(+) tartrate positive (Java) were also isolated. Importantly, 85% of the turtle isolates matched pulsed-field gel electrophoresis patterns of human isolates, including those reported from Georgia. Collectively, these results suggest that turtles accumulate Salmonella present in water bodies, and they may be effective sentinels of environmental contamination. Ultimately, the Salmonella prevalence rates in wild aquatic turtles, especially those strains shared with humans, highlight a significant public health concern.
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Affiliation(s)
- Sonia M Hernandez
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, United States.,Department of Population Health, Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, United States
| | - John J Maurer
- Department of Population Health, Poultry Diagnostic and Research Center, College of Veterinary Medicine, University of Georgia, Athens, GA, United States
| | - Michael J Yabsley
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, United States.,Department of Population Health, Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, United States
| | - Valerie E Peters
- Department of Biological Sciences, Eastern Kentucky University, Richmond, KY, United States
| | - Andrea Presotto
- Department of Geography, University of Georgia, Athens, GA, United States
| | - Maureen H Murray
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, United States.,Department of Population Health, Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, United States.,Davee Center for Epidemiology and Endocrinology and the Urban Wildlife Institute, Lincoln Park Zoo, Chicago, IL, United States
| | - Shannon Curry
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, United States.,Department of Population Health, Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, United States
| | - Susan Sanchez
- Athens Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Georgia, Athens, GA, United States
| | - Peter Gerner-Smidt
- Enteric Diseases Laboratory Branch, Centers for Disease Control and Prevention, Atlanta, GA, United States
| | - Kelley Hise
- Enteric Diseases Laboratory Branch, Centers for Disease Control and Prevention, Atlanta, GA, United States
| | - Joyce Huang
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, United States.,Department of Population Health, Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, United States
| | - Kasey Johnson
- Department of Population Health, Poultry Diagnostic and Research Center, College of Veterinary Medicine, University of Georgia, Athens, GA, United States
| | - Tiffany Kwan
- Department of Population Health, Poultry Diagnostic and Research Center, College of Veterinary Medicine, University of Georgia, Athens, GA, United States
| | - Erin K Lipp
- Department of Environmental Health Science, College of Public Health, University of Georgia, Athens, GA, United States
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Teitelbaum CS, Hepinstall-Cymerman J, Kidd-Weaver A, Hernandez SM, Altizer S, Hall RJ. Urban specialization reduces habitat connectivity by a highly mobile wading bird. MOVEMENT ECOLOGY 2020; 8:49. [PMID: 33372623 PMCID: PMC7720518 DOI: 10.1186/s40462-020-00233-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 11/17/2020] [Indexed: 06/12/2023]
Abstract
BACKGROUND Mobile animals transport nutrients and propagules across habitats, and are crucial for the functioning of food webs and for ecosystem services. Human activities such as urbanization can alter animal movement behavior, including site fidelity and resource use. Because many urban areas are adjacent to natural sites, mobile animals might connect natural and urban habitats. More generally, understanding animal movement patterns in urban areas can help predict how urban expansion will affect the roles of highly mobile animals in ecological processes. METHODS Here, we examined movements by a seasonally nomadic wading bird, the American white ibis (Eudocimus albus), in South Florida, USA. White ibis are colonial wading birds that forage on aquatic prey; in recent years, some ibis have shifted their behavior to forage in urban parks, where they are fed by people. We used a spatial network approach to investigate how individual movement patterns influence connectivity between urban and non-urban sites. We built a network of habitat connectivity using GPS tracking data from ibis during their non-breeding season and compared this network to simulated networks that assumed individuals moved indiscriminately with respect to habitat type. RESULTS We found that the observed network was less connected than the simulated networks, that urban-urban and natural-natural connections were strong, and that individuals using urban sites had the least-variable habitat use. Importantly, the few ibis that used both urban and natural habitats contributed the most to connectivity. CONCLUSIONS Habitat specialization in urban-acclimated wildlife could reduce the exchange of propagules and nutrients between urban and natural areas, which has consequences both for beneficial effects of connectivity such as gene flow and for detrimental effects such as the spread of contaminants or pathogens.
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Affiliation(s)
| | | | - Anjelika Kidd-Weaver
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, USA
- Present address: College of Agriculture, Forestry and Life Sciences, Clemson University, Clemson, SC, USA
| | - Sonia M Hernandez
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, USA
- Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - Sonia Altizer
- Odum School of Ecology, University of Georgia, Athens, GA, USA
| | - Richard J Hall
- Odum School of Ecology, University of Georgia, Athens, GA, USA
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
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Millán J, Di Cataldo S, Volokhov DV, Becker DJ. Worldwide occurrence of haemoplasmas in wildlife: Insights into the patterns of infection, transmission, pathology and zoonotic potential. Transbound Emerg Dis 2020; 68:3236-3256. [PMID: 33210822 DOI: 10.1111/tbed.13932] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 11/13/2020] [Accepted: 11/14/2020] [Indexed: 12/17/2022]
Abstract
Haemotropic mycoplasmas (haemoplasmas) have increasingly attracted the attention of wildlife disease researchers due to a combination of wide host range, high prevalence and genetic diversity. A systematic review identified 75 articles that investigated haemoplasma infection in wildlife by molecular methods (chiefly targeting partial 16S rRNA gene sequences), which included 131 host genera across six orders. Studies were less common in the Eastern Hemisphere (especially Africa and Asia) and more frequent in the Artiodactyla and Carnivora. Meta-analysis showed that infection prevalence did not vary by geographic region nor host order, but wild hosts showed significantly higher prevalence than captive hosts. Using a taxonomically flexible machine learning algorithm, we also found vampire bats and cervids to have greater prevalence, whereas mink, a subclade of vesper bats, and true foxes all had lower prevalence compared to the remaining sampled mammal phylogeny. Haemoplasma genotype and nucleotide diversity varied little among wild mammals but were marginally lower in primates and bats. Coinfection with more than one haemoplasma species or genotype was always confirmed when assessed. Risk factors of infection identified were sociality, age, males and high trophic levels, and both prevalence and diversity were often higher in undisturbed environments. Haemoplasmas likely use different and concurrent transmission routes and typically display enzootic dynamics when wild populations are studied longitudinally. Haemoplasma pathology is poorly known in wildlife but appears subclinical. Candidatus Mycoplasma haematohominis, which causes disease in humans, probably has it natural host in bats. Haemoplasmas can serve as a model system in ecological and evolutionary studies, and future research on these pathogens in wildlife must focus on increasing the geographic range and taxa of studies and elucidating pathology, transmission and zoonotic potential. To facilitate such work, we recommend using universal PCR primers or NGS protocols to detect novel haemoplasmas and other genetic markers to differentiate among species and infer cross-species transmission.
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Affiliation(s)
- Javier Millán
- Instituto Agroalimentario de Aragón-IA2 (Universidad de Zaragoza-CITA), Zaragoza, Spain.,Fundación ARAID, Zaragoza, Spain.,Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | - Sophia Di Cataldo
- Programa de Doctorado en Medicina de la Conservación, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
| | - Dmitriy V Volokhov
- Center for Biologics Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, Maryland, USA
| | - Daniel J Becker
- Department of Biology, University of Oklahoma, Norman, Oklahoma, USA
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