scholarly journals The One Health Approach is Necessary for the Control of Rift Valley Fever Infections in Egypt: A Comprehensive Review

Viruses ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 139 ◽  
Author(s):  
Mohamed Fawzy ◽  
Yosra A. Helmy
Keyword(s):  
Rift Valley ◽  
Rift Valley Fever ◽  
One Health ◽  
Economic Stress ◽  
Current Status ◽  
Economic Losses ◽  
High Morbidity ◽  
Valley Fever ◽  
The One ◽  
And Control

Rift Valley fever (RVF) is an emerging transboundary, mosquito-borne, zoonotic viral disease caused high morbidity and mortality in both human and ruminant populations. It is considered an important threat to both agriculture and public health in African and the Middle Eastern countries including Egypt. Five major RVF epidemics have been reported in Egypt (1977, 1993, 1994, 1997, and 2003). The virus is transmitted in Egypt by different mosquito's genera such as Aedes, Culex, Anopheles, and Mansonia, leading to abortions in susceptible animal hosts especially sheep, goat, cattle, and buffaloes. Recurrent RVF outbreaks in Egypt have been attributed in part to the lack of routine surveillance for the virus. These periodic epizootics have resulted in severe economic losses. We posit that there is a critical need for new approaches to RVF control that will prevent or at least reduce future morbidity and economic stress. One Health is an integrated approach for the understanding and management of animal, human, and environmental determinants of complex problems such as RVF. Employing the One Health approach, one might engage local communities in surveillance and control of RVF efforts, rather than continuing their current status as passive victims of the periodic RVF incursions. This review focuses upon endemic and epidemic status of RVF in Egypt, the virus vectors and their ecology, transmission dynamics, risk factors, and the ecology of the RVF at the animal/human interface, prevention, and control measures, and the use of environmental and climate data in surveillance systems to predict disease outbreaks.

scholarly journals Active Surveillance in the investigation and analysis of RVFin Western and Central Uganda

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Mary Nanfuka ◽  
Milton Bahati ◽  
Eugene Arinaitwe
Keyword(s):  
Rift Valley ◽  
Rift Valley Fever ◽  
One Health ◽  
Emerging Diseases ◽  
Zoonotic Diseases ◽  
Valley Fever ◽  
The People ◽  
Igm Elisa ◽  
The One ◽  
Western Uganda

ObjectiveTo detect presence of circulating Rift Valley Fever virus (RVFv) in animals of Western and Central Uganda following its confirmation in humans.To establish and communicate reliable information using the one health platformSignificnce:Although in E. Africa RVF was initially detected and known to be a disease endermic in Kenya, the people in Uganda were still hesitating wether the disease is already in existence. Following its first detection in 2016 in Humans there was need to carry out an investigation in the hot spot areas of the human infection to get the real picture and to inform the policy makers for informed decisions.IntroductionRift Valley fiver is viral zoonotic disease which was investigated and reported in Uganda in 20101. For some time now people are not aware whether the disease was still circulating or emerged in animals reared as a result of the inter country trade by the community of the cattle corridor in Uganda, since the last reports in 19682. The increase in the number of disease outbreaks in some parts of central and western Uganda from 2016 to date and the number of human patients investigated, diagnosed and confirmed with RVF by Ministry Of Health (MOH) under the one health program, has placed the disease to be among the top re-emerging diseases in the country3&4 and number 5 of the Multisectoral prioritization of zoonotic diseases in Uganda, 2017 under One Health perspective6.MethodsRift valley Fever was investigated in cattle, goats and sheep of Gomba,Mityana, Kiboga and Kiruhura in Central and Western Uganda. This followed 2 people that had been confirmed with RVF in 20161 Samples were aseptically collected from hot places from 543 victim’s animals including those of the neighbouring areas covering the victims routes of movement plus those areas where people were still sick and where death had reportedly occurred. Samples were then delivered to NADDEC laboratory from where tests were conducted.ResultsSamples were screened using a competition IgG ELISA, then IgM ELISA to capture the recently infected animals. The positive samples from the IgM ELISA were then confirmed using RT-PCR; 169/543 (31%) tested positive to IgG screening ELISA indicating exposure to RVF. The actual infection was found to be 13% (22/169) with IgM ELISA and 3/22 (13.6%) with RT-PCR.ConclusionsZoonotic diseases continue to be a public health burden to the people of Uganda. Considering some people’s behavior of eating the sick and dead animals, has posed a difficult situation to combat the ailment which has resulted in negative socioeconomic impacts, affecting the national policies that range from health security to control of diseases. Uganda has however developed capacity to investigate, test and confirm RVF disease. Since exposure was found in all animal species, detailed active surveillance plan and procedures have been set up to investigate any additional cases in animals to reduce chances of spread to humans and to cub international spread and also to determine the magnitude of exposure.References1 Nabukenya, Investigation and response to Rift Valley Fever and Yellow Fever outbreaks in humans in Uganda, 20162 Nyakarahuka L.prevalence and risk factors of Rift valley in humans and animals from kabale, 20163 Wang LF, Crameri G.Emerging zoonotic viral diseases.Rev Sci Tech Int Epiz.2014;33Institute of Medicine (U.S.), Committee on Achieving Sustainable Global Capacity for surveillance and4 Response to Emerging Diseases of Zoonotic Origin, Keusch G. Sustaining global surveillance and response to emerging zoonotic diseases, 20095 Musa Sekamatte, Vikram K.Multisectoral prioritization of zoonotic diseases in Uganda, 2017, A One Health perspective6 Munyua P, Bitek A, Osoro E, Pieracci EG, Muema J,Mwatondo A,et al, Prioritization of Zoonotic Diseases in Kenya,2015. PLOS ONE. 2016;11:e0161576. http://doi.org/10.1371/journal.pone.0161576 PMID:27557120 

scholarly journals Benefits of a one health approach: An example using Rift Valley fever

One Health ◽  
2018 ◽  
Vol 5 ◽  
pp. 34-36 ◽  
Author(s):  
Melinda K. Rostal ◽  
Noam Ross ◽  
Catherine Machalaba ◽  
Claudia Cordel ◽  
Janusz T. Paweska ◽  
...  
Keyword(s):  
Rift Valley ◽  
Rift Valley Fever ◽  
One Health ◽  
Valley Fever

scholarly journals The epidemiology and socio-economic impact of Rift Valley fever epidemics in Tanzania: A review

2012 ◽  
Vol 79 (2) ◽  
Author(s):  
Calvin Sindato ◽  
Esron Karimuribo ◽  
E.G. Mboera
Keyword(s):  
Economic Impact ◽  
Rift Valley ◽  
Rift Valley Fever ◽  
Climatic Factors ◽  
Large Population ◽  
Economic Losses ◽  
Extensive Literature ◽  
Animal Movements ◽  
Valley Fever ◽  
Socio Economic Impact

A review was conducted to provide comprehensive update on Rift Valley fever (RVF) in Tanzania, with particular attention devoted to trend of occurrence, epidemiological factors, socio-economic impact and measures which were applied to its control. Information presented in this paper was obtained through extensive literature review. Rift Valley fever was documented for the first time in Tanzania in 1977. This was followed by epidemics in 1997 and 2007. Contrary to the latest epidemic in 2007 sporadic cases of RVF during the previous epidemics were confined to mainly livestock and mostly affecting northern parts of Tanzania. The latest disease epidemic expanded to cover wider areas (mostly northern and central zones) of the country involving both human and domestic ruminants. During the latest disease outbreak 52.4% (n = 21) of regions in Tanzania mainland were affected and majority (72.7, n = 11) of the regions had concurrent infections in human and animals. Phylogenetic comparison of nucleotide and amimo acid sequences revealed different virus strains between Kenya and Tanzania.Epidemiological factors that were considered responsible for the previous RVF epidemics in Tanzania included farming systems, climatic factors, vector activities and presence of large population of ruminant species, animal movements and food consumption habits. Majority of the RVF positive cases in the latest epidemic were livestock under pastoral and agro-pastoral farming systems.The disease caused serious effects on rural people’s food security and household nutrition and on direct and indirect losses to livestock producers in the country. Psycho-social distress that communities went through was enormous, which involved the thinking about the loss of their family members and/or relatives, their livestock and crop production. Socially, the status of most livestock producers was eroded in their communities.Cessation of lucrative trade in ruminants resulted in serious economic losses to the populations who were totally dependent upon this income. Livestock internal market flows drastically dropped by 37% during latest epidemic. Rift Valley fever epidemics had dramatic impact of RVF outbreak on the international animal trade in which there was a 54% decline in exports equivalent to loss of $352 750.00. The estimate of loss as a result of deaths for cattle was $4 243 250.00 whereas that of goats and sheep was $2 202 467.00.Steps taken to combat epidemics included restriction of animal movements, ban of the slaughter of cattle and vaccination of livestock and health education.From past epidemics we have learnt that each subsequent outbreak had expanded to cover wider areas of the country. The disease had dramatic socio-economic impacts both at community and nation at large. The main challenges related to the control of RVF outbreaks included lack of preparedness plan for RVF, poor coordination and information transmission, limited facilities and manpower for RVF outbreak intervention. Control of the 2007 RVF epidemic was largely the result of animal and human health agencies working in an integrated manner.

scholarly journals The Change P82L in the Rift Valley Fever Virus NSs Protein Confers Attenuation in Mice Not Related with a Type-I IFN Antagonistic Phenotype

2021 ◽  
Author(s):  
Belén Borrego ◽  
Sandra Moreno ◽  
Nuria de la Losa ◽  
Friedemann Weber ◽  
Alejandro Brun
Keyword(s):  
Amino Acid ◽  
Rift Valley ◽  
Rift Valley Fever ◽  
Rift Valley Fever Virus ◽  
Fever Virus ◽  
Single Amino Acid ◽  
Economic Losses ◽  
Type I ◽  
Valley Fever

Rift valley fever virus (RVFV) is a mosquito-borne bunyavirus that causes an important disease in ruminants, with great economic losses. The infection can be also transmitted to humans; therefore it is considered a major threat to both human and animal health. In a previous work, we described a novel RVFV variant selected in cell culture in the presence of the antiviral agent favipiravir that was highly attenuated in vivo. This variant displayed 24 amino acid substitutions in different viral proteins when compared to its parental viral strain, two of them located in the NSs protein that is known to be the major virulence factor of RVFV. By means of a reverse genetics system, in this work we have analyzed the effect that one of these substitutions, P82L, has in viral attenuation in vivo. Rescued viruses carrying this single amino acid change were clearly attenuated in BALB/c mice while their growth in an IFN-competent cell line as well as the production of IFN-β did not seem to be affected. However, the pattern of nuclear NSs accumulation was modified in cells infected with the mutant viruses. These results unveil a new RVFV virulence marker highlighting the multiple ways of NSs protein to modulate viral infectivity.

scholarly journals Over 100 Years of Rift Valley Fever: A Patchwork of Data on Pathogen Spread and Spillover

Pathogens ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 708
Author(s):  
Gebbiena M. Bron ◽  
Kathryn Strimbu ◽  
Hélène Cecilia ◽  
Anita Lerch ◽  
Sean M. Moore ◽  
...  
Keyword(s):  
Rift Valley ◽  
Rift Valley Fever ◽  
Rift Valley Fever Virus ◽  
Economic Losses ◽  
Valley Fever ◽  
Critical Data ◽  
The Past ◽  
Data Gaps ◽  
Combined Data

During the past 100 years, Rift Valley fever virus (RVFV), a mosquito-borne virus, has caused potentially lethal disease in livestock, and has been associated with significant economic losses and trade bans. Spillover to humans occurs and can be fatal. Here, we combined data on RVF disease in humans (22 countries) and animals (37 countries) from 1931 to 2020 with seroprevalence studies from 1950 to 2020 (n = 228) from publicly available databases and publications to draw a more complete picture of the past and current RVFV epidemiology. RVFV has spread from its original locus in Kenya throughout Africa and into the Arabian Peninsula. Throughout the study period seroprevalence increased in both humans and animals, suggesting potentially increased RVFV exposure. In 24 countries, animals or humans tested positive for RVFV antibodies even though outbreaks had never been reported there, suggesting RVFV transmission may well go unnoticed. Among ruminants, sheep were the most likely to be exposed during RVF outbreaks, but not during periods of cryptic spread. We discuss critical data gaps and highlight the need for detailed study descriptions, and long-term studies using a one health approach to further convert the patchwork of data to the tale of RFV epidemiology.

Understanding Rift Valley fever: Contributions of animal models to disease characterization and control

2015 ◽  
Vol 66 (1) ◽  
pp. 78-88 ◽  
Author(s):  
Gema Lorenzo ◽  
Elena López-Gil ◽  
George M. Warimwe ◽  
Alejandro Brun
Keyword(s):  
Animal Models ◽  
Rift Valley ◽  
Rift Valley Fever ◽  
Valley Fever ◽  
And Control
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