scholarly journals Effects of isolation and slaughter strategies in different species on emerging zoonoses

2017 ◽  
Vol 14 (5/6) ◽  
pp. 1119-1140
Author(s):  
Jing-An Cui ◽  
Fangyuan Chen
Keyword(s):  
Author(s):  
Kim A. Kayunze ◽  
Angwara D. Kiwara ◽  
Eligius Lyamuya ◽  
Dominic M. Kambarage ◽  
Jonathan Rushton ◽  
...  

One-health approaches have started being applied to health systems in some countries in controlling infectious diseases in order to reduce the burden of disease in humans, livestock and wild animals collaboratively. However, one wonders whether the problem of lingering and emerging zoonoses is more affected by health policies, low application of one-health approaches, or other factors. As part of efforts to answer this question, the Southern African Centre for Infectious Disease Surveillance (SACIDS) smart partnership of human health, animal health and socio-economic experts published, in April 2011, a conceptual framework to support One Health research for policy on emerging zoonoses. The main objective of this paper was to identify which factors really affect the burden of disease and how the burden could affect socio-economic well-being. Amongst other issues, the review of literature shows that the occurrence of infectious diseases in humans and animals is driven by many factors, the most important ones being the causative agents (viruses, bacteria, parasites, etc.) and the mediator conditions (social, cultural, economic or climatic) which facilitate the infection to occur and hold. Literature also shows that in many countries there is little collaboration between medical and veterinary services despite the shared underlying science and the increasing infectious disease threat. In view of these findings, a research to inform health policy must walk on two legs: a natural sciences leg and a social sciences one.


Author(s):  
Toni Wandra

World Health Organization (WHO) defines zoonotic diseases (zoonoses) as those diseases and infections which are naturally transmitted between vertebrate animals and humans. More than 250 zoonoses have been described, over 60% of pathogens that cause diseases in humans are zoonoses of animals, and 75% of emerging infectious diseases. Most pandemics are caused by zoonoses.


Mammal Study ◽  
2005 ◽  
Vol 30 (sp1) ◽  
pp. S67-S71 ◽  
Author(s):  
Sarah E. Perkins ◽  
Isabella Cattadori ◽  
Peter J. Hudson
Keyword(s):  

2017 ◽  
Vol 372 (1725) ◽  
pp. 20160168 ◽  
Author(s):  
S. Cleaveland ◽  
J. Sharp ◽  
B. Abela-Ridder ◽  
K. J. Allan ◽  
J. Buza ◽  
...  

Emerging zoonoses with pandemic potential are a stated priority for the global health security agenda, but endemic zoonoses also have a major societal impact in low-resource settings. Although many endemic zoonoses can be treated, timely diagnosis and appropriate clinical management of human cases is often challenging. Preventive ‘One Health’ interventions, e.g. interventions in animal populations that generate human health benefits, may provide a useful approach to overcoming some of these challenges. Effective strategies, such as animal vaccination, already exist for the prevention, control and elimination of many endemic zoonoses, including rabies, and several livestock zoonoses (e.g. brucellosis, leptospirosis, Q fever) that are important causes of human febrile illness and livestock productivity losses in low- and middle-income countries. We make the case that, for these diseases, One Health interventions have the potential to be more effective and generate more equitable benefits for human health and livelihoods, particularly in rural areas, than approaches that rely exclusively on treatment of human cases. We hypothesize that applying One Health interventions to tackle these health challenges will help to build trust, community engagement and cross-sectoral collaboration, which will in turn strengthen the capacity of fragile health systems to respond to the threat of emerging zoonoses and other future health challenges. One Health interventions thus have the potential to align the ongoing needs of disadvantaged communities with the concerns of the broader global community, providing a pragmatic and equitable approach to meeting the global goals for sustainable development and supporting the global health security agenda. This article is part of the themed issue ‘One Health for a changing world: zoonoses, ecosystems and human well-being’.


2017 ◽  
Vol 17 (8) ◽  
pp. 599-609 ◽  
Author(s):  
Jing-an Cui ◽  
Fangyuan Chen ◽  
Shengjie Fan

mBio ◽  
2013 ◽  
Vol 4 (5) ◽  
Author(s):  
Simon J. Anthony ◽  
Jonathan H. Epstein ◽  
Kris A. Murray ◽  
Isamara Navarrete-Macias ◽  
Carlos M. Zambrana-Torrelio ◽  
...  

ABSTRACTThe majority of emerging zoonoses originate in wildlife, and many are caused by viruses. However, there are no rigorous estimates of total viral diversity (here termed “virodiversity”) for any wildlife species, despite the utility of this to future surveillance and control of emerging zoonoses. In this case study, we repeatedly sampled a mammalian wildlife host known to harbor emerging zoonotic pathogens (the Indian Flying Fox,Pteropus giganteus) and used PCR with degenerate viral family-level primers to discover and analyze the occurrence patterns of 55 viruses from nine viral families. We then adapted statistical techniques used to estimate biodiversity in vertebrates and plants and estimated the total viral richness of these nine families inP. giganteusto be 58 viruses. Our analyses demonstrate proof-of-concept of a strategy for estimating viral richness and provide the first statistically supported estimate of the number of undiscovered viruses in a mammalian host. We used a simple extrapolation to estimate that there are a minimum of 320,000 mammalian viruses awaiting discovery within these nine families, assuming all species harbor a similar number of viruses, with minimal turnover between host species. We estimate the cost of discovering these viruses to be ~$6.3 billion (or ~$1.4 billion for 85% of the total diversity), which if annualized over a 10-year study time frame would represent a small fraction of the cost of many pandemic zoonoses.IMPORTANCERecent years have seen a dramatic increase in viral discovery efforts. However, most lack rigorous systematic design, which limits our ability to understand viral diversity and its ecological drivers and reduces their value to public health intervention. Here, we present a new framework for the discovery of novel viruses in wildlife and use it to make the first-ever estimate of the number of viruses that exist in a mammalian host. As pathogens continue to emerge from wildlife, this estimate allows us to put preliminary bounds around the potential size of the total zoonotic pool and facilitates a better understanding of where best to allocate resources for the subsequent discovery of global viral diversity.


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