scholarly journals Indigenous Wildlife Rabies in Taiwan: Ferret Badgers, a Long Term Terrestrial Reservoir

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Yu-Ching Lan ◽  
Tzai-Hung Wen ◽  
Chao-chin Chang ◽  
Hsin-Fu Liu ◽  
Pei-Fen Lee ◽  
...  

The emerging disease of rabies was confirmed in Taiwan ferret badgers (FBs) and reported to the World Organization for Animal Health (OIE) on July 17, 2013. The spread of wildlife rabies can be related to neighborhood countries in Asia. The phylogenetic analysis was conducted by maximum likelihood (ML) methods and the Bayesian coalescent approach based on the glycoprotein (G) and nucleoprotein (N) genes. The phylogeographic and spatial temporal dynamics of viral transmission were determined by using SPREAD, QGIS. Therefore, the origin and the change with time of the viruses can be identified. Results showed the rabies virus of FB strains in Taiwan is a unique clade among other strains in Asia. According to the phylogeographic coalescent tree, three major genotypes of the FB rabies virus have circulated in three different geographical areas in Taiwan. Two genotypes have distributed into central and southern Taiwan between two ecological river barriers. The third genotype has been limited in southeastern Taiwan by the natural mountain barrier. The diversity of FB rabies viruses indicates that the biological profile of FBs could vary in different geographical areas in Taiwan. An enhanced surveillance system needs to be established near the currently identified natural barriers for early warnings of the rabies virus outbreak in Taiwan.

1999 ◽  
Vol 73 (1) ◽  
pp. 242-250 ◽  
Author(s):  
Teshome Mebatsion ◽  
Frank Weiland ◽  
Karl-Klaus Conzelmann

ABSTRACT To elucidate the functions of rhabdovirus matrix (M) protein, we determined the localization of M in rabies virus (RV) and analyzed the properties of an M-deficient RV mutant. We provide evidence that M completely covers the ribonucleoprotein (RNP) coil and keeps it in a condensed form. As determined by cosedimentation experiments, not only the M-RNP complex but also M alone was found to interact specifically with the glycoprotein G. In contrast, an interaction of G with the nucleoprotein N or M-less RNP was not observed. In the absence of M, infectious particles were mainly cell associated and the yield of cell-free infectious virus was reduced by as much as 500,000-fold, demonstrating the crucial role of M in virus budding. Supernatants from cells infected with the M-deficient RV did not contain the typical bullet-shaped rhabdovirus particles but instead contained long, rod-shaped virions, demonstrating severe impairment of the virus formation process. Complementation with M protein expressed from plasmids rescued rhabdovirus formation. These results demonstrate the pivotal role of M protein in condensing and targeting the RNP to the plasma membrane as well as in incorporation of G protein into budding virions.


1999 ◽  
Vol 73 (1) ◽  
pp. 510-518 ◽  
Author(s):  
Kinjiro Morimoto ◽  
D. Craig Hooper ◽  
Sergei Spitsin ◽  
Hilary Koprowski ◽  
Bernhard Dietzschold

ABSTRACT The mouse-adapted rabies virus strain CVS-24 has stable variants, CVS-B2c and CVS-N2c, which differ greatly in their pathogenicity for normal adult mice and in their ability to infect nonneuronal cells. The glycoprotein (G protein), which has previously been implicated in rabies virus pathogenicity, shows substantial structural differences between these variants. Although prior studies have identified antigenic site III of the G protein as the major pathogenicity determinant, CVS-B2c and CVS-N2c do not vary at this site. The possibility that pathogenicity is inversely related to G protein expression levels is suggested by the finding that CVS-B2c, the less pathogenic variant, expresses at least fourfold-higher levels of G protein than CVS-N2c in infected neurons. Although there is some difference between CVS-B2c- and CVS-N2c-infected neurons in G protein mRNA expression levels, the differential expression of G protein appears to be largely determined by posttranslational mechanisms that affect G protein stability. Pulse-chase experiments indicated that the G protein of CVS-B2c is degraded more slowly than that of CVS-N2c. The accumulation of G protein correlated with the induction of programmed cell death in CVS-B2c-infected neurons. The extent of apoptosis was considerably lower in CVS-N2c-infected neurons, where G protein expression was minimal. While nucleoprotein (N protein) expression levels were similar in neurons infected with either variant, the transport of N protein into neuronal processes was strongly inhibited in CVS-B2c-infected cells. Thus, downregulation of G protein expression in neuronal cells evidently contributes to rabies virus pathogenesis by preventing apoptosis and the apparently associated failure of the axonal transport of N protein.


2018 ◽  
Vol 31 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Evelyne Picard-Meyer ◽  
Carine Peytavin de Garam ◽  
Jean Luc Schereffer ◽  
Emmanuelle Robardet ◽  
Florence Cliquet

Rabies is diagnosed postmortem in animals, based on tests prescribed by the World Organization for Animal Health (OIE), such as the fluorescent antibody test, the direct rapid immunohistochemistry test, or pan-lyssavirus PCR assays. Several reverse-transcription real-time PCR (RT-rtPCR) methods have been developed and validated for rapid and accurate detection of lyssaviruses. We evaluated the performance of 6 TaqMan RT-rtPCR kits using different commercial master mixes and 2 real-time thermocyclers. Changing the master mix overall did not influence the TaqMan RT-rtPCR performance, regardless of the thermocycler used. The limits of detection at the 95% confidence level were 18.1–25.8 copies/µL for the Rotor-Gene Q MDx thermocycler and 16.7–21.5 for the Mx3005P thermocycler. Excellent repeatability was demonstrated for rabies virus (RABV) RNA samples of 100, 50, and 25 copies/µL regardless of the thermocycler used. RABV field samples ( n = 35) isolated worldwide gave positive results using the most efficient of the 6 kits tested, with a copy number of 6.03 × 102 to 6.78 × 107 RNA copies per reaction. The TaqMan RT-rtPCR assay provides sensitive and rapid amplification of RABV RNA.


2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Joyce Adebayo ◽  
Victor Ojo ◽  
Gabriel Ogundipe ◽  
Patrick Mboya Nguku

ObjectiveThe objectives of this study are to evaluate the current animal rabies surveillance system in the state and suggest recommendations.IntroductionRabies is a zoonotic, neglected viral disease. Every 10 minutes, the world loses a life, especially children, to dog-mediated rabies. Yet it is 100% preventable. Africa, including Nigeria, has major share of the disease. Eradication of human rabies relies majorly on control of rabies in animals and this cannot be achieved without good surveillance system of the disease in animal, especially dogs. There is little or no information as to whether the surveillance system in Nigeria is effective.MethodsWe reviewed the medical records of all rabies cases reported in the 10 government and 5 registered private veterinary health facilities in the 16 LGAs of the state. We extracted 44 cases of rabies in all, between review period of 2012-2017. We also interviewed 25 key stakeholders in the system using Key Informant Interview (KII) and questionnaires. We followed the steps stated in CDC guideline for evaluation of public health surveillance system to assess the key attributes and components of the system, and analysed the data using Microsoft Excel.ResultsTwo (20%) of the government and only one in five private veterinary health facilities had records on rabies cases. All reported cases of suspected rabies involved dog bites. The confirmatory status of 32 (72.7%) of the suspected cases were unknown. Six (37.5%) LGAs did not have access to any veterinary health facility. Average of 1 technical staff per veterinary facility was seen. Overall, the system was useful and flexible. It was fairly simple, acceptable and representative. Both sensitivity and predictive Value Positive (PVP) were less than 1% while the timeliness, data quality and stability were poorConclusionsThe surveillance system was performing below optimal level. There is need for improvement in the animal rabies surveillance system to achieve elimination of human rabies in Nigeria.ReferencesAdedeji, A. O., Okonko, I. O., Eyarefe, O. D., Adedeji, O. B., Babalola, E. T., and Ojezele, M. O. (2010). An overview of rabies - History , epidemiology , control and possible elimination. African Journal of Microbiology Research, 4(22), 2327–2338.Aliyu, T. (2010). Prevalence of Rabies Virus Antigens in Apparently Healthy Dogs in Yola , Nigeria. Researcher, 2(2), 1–14.Ameh, V. O., Dzikwi, A. A., and Umoh, J. U. (2014). Assessment of Knowledge , Attitude and Practice of Dog Owners to Canine Rabies in Wukari Metropolis , Taraba State Nigeria. Global Journal of Health Science, 6(5), 226–240.Burgos-Cáceres, S., and Sigfrido. (2011). Canine Rabies: A Looming Threat to Public Health. Animals, 1(4), 326–342.Dutta, J. K., and Dutta, T. K. (1994). Rabies in endemic countries. BMJ (Clinical Research Ed.), 308(6927), 488–9.Ehimiyein, A. M., and Ehimiyein, I. O. (2014). Rabies– Its Previous and Current Trend as an Endemic Disease of Humans and Mammals in Nigeria. Journal of Experimental Biology and Agricultural Science, 2(2320), 137–149.El-moamly, A. (2014). Immunochromatographic Techniques : Benefits for the Diagnosis of Parasitic Infections. Austin Chromatography, 1(4), 1–8.Fekadu, M. (1993). Canine rabies. Journal of Veterinary Research, 60, 421–427.Kasempimolporn, S., Saengseesom, W., Huadsakul, S., Boonchang, S., and Sitprija, V. (2011). Evaluation of a rapid immunochromatographic test strip for detection of Rabies virus in dog saliva samples. Journal of Veterinary Diagnostic Investigation, 23(6), 1197-1201.Muriuki J, Thaiyah A, Mbugua S, Kitaa J and Kirui. G. (2016). Knowledge,Attitude and Practices on Rabies and Socio-economic Value of Dog Keeping in isumu and Siaya countries, Kenya. International Jornal of Veterinary Science, 5(1), 29–33.National Population Commission. (2009). 2006 population and housing census of the Federal Republic of Nigeria. Official Gazette of the Federal Republic of Nigeria, 96(2), 1.Ogunkoya, A. ., Aina, O. ., Adebayo, O. ., Oluwagbenga, A. ., Tirmidhi, A. ., Audu, S. and Garba, A. (2012). Rabies Antigen Spread Amongst Apparently Healthy Dogs in Nigeria : A Review. Rita Brazil, 8(October), 74.OIE: World Organization for Animal Health. (2012). OIE Global Conference on Rabies Control: OIE - World Organisation for Animal Health. on-rabies-control/OIE: World Organization for Animal Health. (2014). Dog vaccination: the key to end dog-transmitted human rabies : OIE - World Organisation for Animal Health.Otolorin, G. R., Umoh, J. U., Dzikwi, A. A., and Anglais, A. E. (2014). Prevalence of Rabies Antigen in Brain Tissue of Dogs Slaughtered for Human Consumption and Evaluation of Vaccination of Dogs Against Rabies in Aba , Abia State Nigeria. World J Public Health Sciences, 3(1), 5–10.Panda, S., Mitra, J., Chowdhury, S., and Sarkar, S. N. (2016). Detection Of Rabies Viral Antigen In Cattle By Rapid Immunochromtographic Diagnostic Test. Explor Anim Medical Res, 6(1), 119–122.Sharma, P., Singh, C. K., and Narang, D. (2015). Comparison of immunochromatographic diagnostic test with heminested r everse transcriptase polymerase chain reaction for detection of rabies virus from brain samples of various species. Veterinary World, 8(2), 135–138.Singh, C K; Kaw, A; Bansal, K; Dandale, M and Pranoti, S. (2012). Approaches for antemortem diagnosis of rabies 1. CIBTech Journal of Biotechnology, 1(1), 1–16.Takayama, N. (2008). Rabies: A preventable but incurable disease. Journal of Infection and Chemotherapy, 14(1), 8–14.Wang, H., Feng, N., Yang, S., Wang, C., Wang, T., Gao, Y. and Xia, X. (2010). A rapid immunochromatographic test strip for detecting rabies virus antibody. Journal of Virological Methods, 170(1–2), 80–5.WHO. (2016). WHO | Rabies. WHO.Wu, X., Hu, R., Zhang, Y., Dong, G. and Rupprecht, C. E. (2009). Reemerging rabies and lack of systemic surveillance in People’s Republic of China. Emerging Infectious Diseases, 15(8), 1159–64. 


Viruses ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 681
Author(s):  
Jia-Ming Tsai ◽  
Song-Lang Huang ◽  
Chung-Da Yang

The Megalocytivirus genus includes three genotypes, red sea bream iridovirus (RSIV), infectious spleen and kidney necrosis virus (ISKNV), and turbot reddish body iridovirus (TRBIV), and has caused mass mortalities in various marine and freshwater fish species in East and Southeast Asia. Of the three genotypes, TRBIV-like megalocytivirus is not included in the World Organization for Animal Health (OIE)-reportable virus list because of its geographic restriction and narrow host range. In 2017, 39 cases of suspected iridovirus infection were isolated from fingerlings of giant sea perch (Lates calcarifer) cultured in southern Taiwan during megalocytivirus epizootics. Polymerase chain reaction (PCR) with different specific primer sets was undertaken to identify the causative agent. Our results revealed that 35 out of the 39 giant sea perch iridovirus (GSPIV) isolates were TRBIV-like megalocytiviruses. To further evaluate the genetic variation, the nucleotide sequences of major capsid protein (MCP) gene (1348 bp) from 12 of the 35 TRBIV-like megalocytivirus isolates were compared to those of other known. High nucleotide sequence identity showed that these 12 TRBIV-like GSPIV isolates are the same species. Phylogenetic analysis based on the MCP gene demonstrated that these 12 isolates belong to the clade II of TRBIV megalocytiviruses, and are distinct from RSIV and ISKNV. In conclusion, the GSPIV isolates belonging to TRBIV clade II megalocytiviruses have been introduced into Taiwan and caused a severe impact on the giant sea perch aquaculture industry.


2021 ◽  
pp. 002071522199352
Author(s):  
Boris Heizmann ◽  
Nora Huth

This article addresses the extent to which economic downturns influence the perception of immigrants as an economic threat and through which channels this occurs. Our primary objective is an investigation of the specific mechanisms that connect economic conditions to the perception of immigrants as a threat. We therefore also contribute to theoretical discussions based on group threat and realistic group conflict theory by exposing the dominant source of competition relevant to these relationships. Furthermore, we investigate whether people react more sensitive to short-term economic dynamics within countries than to the long-term economic circumstances. Our database comprises all waves of the European Social Survey from 2002 to 2017. The macro-economic indicators we use include GDP per capita, unemployment, and national debt levels, covering the most salient economic dimensions. We furthermore control for the country’s migration situation and aggregate party positions toward cultural diversity. Our results show that the dynamic short-term developments of the economy and migration within countries are of greater relevance for perceived immigrant threat than the long-term situation. In contrast, the long-term political climate appears to be more important than short-term changes in the aggregate party positions. Further mediation analyses show that objective economic conditions influence anti-immigrant attitudes primarily through individual perceptions of the country’s economic performance and that unemployment rates are of primary importance.


2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Sungmin O. ◽  
Rene Orth

AbstractWhile soil moisture information is essential for a wide range of hydrologic and climate applications, spatially-continuous soil moisture data is only available from satellite observations or model simulations. Here we present a global, long-term dataset of soil moisture derived through machine learning trained with in-situ measurements, SoMo.ml. We train a Long Short-Term Memory (LSTM) model to extrapolate daily soil moisture dynamics in space and in time, based on in-situ data collected from more than 1,000 stations across the globe. SoMo.ml provides multi-layer soil moisture data (0–10 cm, 10–30 cm, and 30–50 cm) at 0.25° spatial and daily temporal resolution over the period 2000–2019. The performance of the resulting dataset is evaluated through cross validation and inter-comparison with existing soil moisture datasets. SoMo.ml performs especially well in terms of temporal dynamics, making it particularly useful for applications requiring time-varying soil moisture, such as anomaly detection and memory analyses. SoMo.ml complements the existing suite of modelled and satellite-based datasets given its distinct derivation, to support large-scale hydrological, meteorological, and ecological analyses.


Author(s):  
Thomas L Rodebaugh ◽  
Madelyn R Frumkin ◽  
Angela M Reiersen ◽  
Eric J Lenze ◽  
Michael S Avidan ◽  
...  

Abstract Background The symptoms of COVID-19 appear to be heterogenous, and the typical course of these symptoms is unknown. Our objectives were to characterize the common trajectories of COVID-19 symptoms and assess how symptom course predicts other symptom changes as well as clinical deterioration. Methods 162 participants with acute COVID-19 responded to surveys up to 31 times for up to 17 days. Several statistical methods were used to characterize the temporal dynamics of these symptoms. Because nine participants showed clinical deterioration, we explored whether these participants showed any differences in symptom profiles. Results Trajectories varied greatly between individuals, with many having persistently severe symptoms or developing new symptoms several days after being diagnosed. A typical trajectory was for a symptom to improve at a decremental rate, with most symptoms still persisting to some degree at the end of the reporting period. The pattern of symptoms over time suggested a fluctuating course for many patients. Participants who showed clinical deterioration were more likely to present with higher reports of severity of cough and diarrhea. Conclusion The course of symptoms during the initial weeks of COVID-19 is highly heterogeneous and is neither predictable nor easily characterized using typical survey methods. This has implications for clinical care and early-treatment clinical trials. Additional research is needed to determine whether the decelerating improvement pattern seen in our data is related to the phenomenon of patients reporting long-term symptoms, and whether higher symptoms of diarrhea in early illness presages deterioration.


Vaccines ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 49
Author(s):  
Verena te Kamp ◽  
Virginia Friedrichs ◽  
Conrad M. Freuling ◽  
Ad Vos ◽  
Madlin Potratz ◽  
...  

The live genetically-engineered oral rabies virus (RABV) variant SPBN GASGAS induces long-lasting immunity in foxes and protection against challenge with an otherwise lethal dose of RABV field strains both after experimental oral and parenteral routes of administration. Induction of RABV-specific binding antibodies and immunoglobulin isotypes (IgM, total IgG, IgG1, IgG2) were comparable in orally and parenterally vaccinated foxes. Differences were only observed in the induction of virus-neutralizing (VNA) titers, which were significantly higher in the parenterally vaccinated group. The dynamics of rabies-specific antibodies pre- and post-challenge (365 days post vaccination) suggest the predominance of type-1 immunity protection of SPBN GASGAS. Independent of the route of administration, in the absence of IgG1 the immune response to SPBN GAGAS was mainly IgG2 driven. Interestingly, vaccination with SPBN GASGAS does not cause significant differences in inducible IFN-γ production in vaccinated animals, indicating a relatively weak cellular immune response during challenge. Notably, the parenteral application of SPBN GASGAS did not induce any adverse side effects in foxes, thus supporting safety studies of this oral rabies vaccine in various species.


2021 ◽  
Vol 9 (4) ◽  
pp. 765
Author(s):  
Janika Wolff ◽  
Martin Beer ◽  
Bernd Hoffmann

Outbreaks of the three capripox virus species, namely lumpy skin disease virus, sheeppox virus, and goatpox virus, severely affect animal health and both national and international economies. Therefore, the World Organization for Animal Health (OIE) classified them as notifiable diseases. Until now, discrimination of capripox virus species was possible by using different conventional PCR protocols. However, more sophisticated probe-based real-time qPCR systems addressing this issue are, to our knowledge, still missing. In the present study, we developed several duplex qPCR assays consisting of different types of fluorescence-labelled probes that are highly sensitive and show a high analytical specificity. Finally, our assays were combined with already published diagnostic methods to a diagnostic workflow that enables time-saving, reliable, and robust detection, differentiation, and characterization of capripox virus isolates.


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