Stock Market Reactions to Contagious Animal Disease Outbreaks: An Event Study in Korean Foot-and-Mouth Disease Outbreaks

Agribusiness ◽  
2013 ◽  
pp. n/a-n/a
Author(s):  
Dustin L. Pendell ◽  
Chulgu Cho
2015 ◽  
Vol 64 (3) ◽  
pp. 849-860 ◽  
Author(s):  
G. Govindaraj ◽  
B. Ganeshkumar ◽  
K. R. Nethrayini ◽  
R. Shalini ◽  
V. Balamurugan ◽  
...  

2021 ◽  
pp. 1622-1630
Author(s):  
Yasmin Bayoumi ◽  
Nader Sobhy ◽  
Abdelkarem Morsi ◽  
Wafaa El-Neshwey ◽  
Nora El-Seddawy ◽  
...  

Background and Aim: Signs of dysautonomia were frequently observed in calves that died during foot-and-mouth disease (FMD) virus (FMDV) outbreaks in Egypt from 2015 to 2018. This study aimed to describe the clinical and histopathological features of the central nervous system in malignant cases of FMD and excluding possible concurrent bacterial, and bovine herpes virus 4 (BHV4) infections or both. Materials and Methods: In this study, 335 FMDV-infected buffalo calves aged 1-22 months were clinically examined and followed until recovery or death. Of the 335 calves, 134 died (malignant group) and 201 recovered after exhibiting classic symptoms of FMD (recover group). The calves were subjected to clinical examination. For the malignant group, several laboratory trials were conducted to assess the possible cause/s of dysautonomia-related viral, bacterial, or concurrent infections. Koch's postulates and polymerase chain reaction were employed. Postmortem and histopathological examinations of nervous tissue were performed. Results: In the malignant group, signs of dysautonomia were observed before death, including partial or complete gut dysfunction, loss of anal sphincter tone, rapid breathing sounds, fluctuating body temperature, and cardiac arrhythmias. In the malignant group, histopathological examination of the spinal cord, pons, medulla oblongata, hypothalamus, cerebellum, and cerebrum revealed demyelination, neuronal degeneration, and focal areas of malacia and gliosis. The nervous tissue and heart samples from malignant cases were positive for serotype O FMDV. Conclusion: Findings revealed in this study support the existence of neurodegeneration induced by FMDV infection in buffalo calves.


Mathematics ◽  
2021 ◽  
Vol 9 (17) ◽  
pp. 2077
Author(s):  
Tihana Škrinjarić

This research deals with stock market reactions of Central Eastern and South Eastern European (CESEE) markets to the COVID-19 pandemic, via the event study methodology approach. Since the stock markets react quickly to certain announcements, the used methodology is appropriate to evaluate how the aforementioned markets reacted to certain events. The purpose of this research was to evaluate possibilities of obtaining profits on the stock markets during great turbulences, when a majority of the participants panic. More specifically, the contrarian trading strategies are observed if they can obtain gains, although a majority of the markets suffer great losses during pandemic shocks. The contributions to the existing literature of this research are as follows. Firstly, empirical research on CESEE stock markets regarding other relevant topics is still scarce and should be explored more. Secondly, the event study approach of COVID-19 effects utilized in this study has (to the knowledge of the author) not yet been explored on the aforementioned markets. Thirdly, based on the results of CESEE market reactions to specific announcements regarding COVID-19, a simulation of simple trading strategies will be made in order to estimate whether some investors could have profited in certain periods. The results of the study indicate promising results in terms of exploiting other investors’ panicking during the greatest decline of stock market indices. Namely, the initial results, as expected, indicate strong negative effects of specific COVID-19 announcements on the selected stock markets. Secondly, the obtained information was shown to be useful for contrarian strategy in order to exploit great dips in the stock market indices values.


2018 ◽  
Vol 66 (1) ◽  
pp. 7-13 ◽  
Author(s):  
Giulia Pezzoni ◽  
Arianna Bregoli ◽  
Santina Grazioli ◽  
Ilaria Barbieri ◽  
Hafsa Madani ◽  
...  

2020 ◽  
Vol 16 (1) ◽  
Author(s):  
Orapun Arjkumpa ◽  
Chalutwan Sansamur ◽  
Pakdee Sutthipankul ◽  
Chaidate Inchaisri ◽  
Kannika Na Lampang ◽  
...  

2004 ◽  
Vol 5 (2) ◽  
pp. 257-262 ◽  
Author(s):  
John Pasick

AbstractThe risk of foreign animal disease introduction continues to exist despite Canada's strict regulations concerning the importation of animals and animal products. Given the rapidity with which these diseases can spread, especially in areas with dense livestock populations, eradication efforts which rely solely on quarantine and stamping-out measures can present a formidable undertaking. This, combined with growing economic and ethical considerations, has led to renewed interest in the use of vaccination as a tool in controlling foreign animal disease outbreaks. Vaccination has effects at the individual and population levels. Efficacious vaccines reduce or prevent clinical signs without necessarily preventing virus replication. They may also increase the dose of virus needed to establish an infection and/or reduce the level and duration of virus shedding following infection. Vaccine effectiveness within a population is a function of its ability to reduce virus transmission. Transmission is best described by the reproductive ratio, R, which is defined as the average number of new infections caused by one infectious individual. By helping to reduce the R-value below 1, vaccination can be an effective adjunct in abbreviating an outbreak. Nevertheless, vaccination can also complicate serological surveillance activities that follow eradication, if the antibody response induced by vaccination is indistinguishable from that which follows infection. This disadvantage can be overcome by the use of DIVA vaccines and their companion diagnostic tests. The term DIVA (differentiating infected from vaccinated individuals) was coined in 1999 by J. T. van Oirschot of the Central Veterinary Institute, in the Netherlands. It is now generally used as an acronym for ‘differentiating infected from vaccinated animals’. The term was originally applied to the use of marker vaccines, which are based on deletion mutants of wild-type microbes, in conjunction with a differentiating diagnostic test. The DIVA strategy has been extended to include subunit and killed whole-virus vaccines. This system makes possible the mass vaccination of a susceptible animal population without compromising the serological identification of convalescent individuals. The DIVA approach has been applied successfully to pseudorabies and avian influenza eradication, and has been proposed for use in foot-and-mouth disease and classical swine fever eradication campaigns. This paper will survey current vaccine technology, the host immune response, and companion diagnostic tests that are available for pseudorabies, foot-and-mouth disease, classical swine fever and avian influenza.


2010 ◽  
Vol 50 (9) ◽  
pp. 852 ◽  
Author(s):  
N. Schembri ◽  
P. K. Holyoake ◽  
M. Hernández-Jover ◽  
J.-A. L. M. L. Toribio

There is increasing interest in the trading practices of producers who market pigs at live auction in Australia and the potential for infectious disease establishment and spread. The practices that underpin the commercial pork industry in Australia are well known. However, little is known about informal movements of pigs in Australia, and the biosecurity risks associated with pig production enterprises that utilise these methods of trade. The aim of this study was to qualitatively evaluate the biosecurity and pig-keeping practices of owners who trade pigs informally for Foot and Mouth Disease and Classical Swine Fever exposure and spread. Interviews were conducted with 13 pig owners who trade via informal means between April and June 2009. Information provided by producers was able to be validated for the six interviews conducted on-farm. There was limited application of recommended biosecurity practices on-farm and few kept health and management records. All interviewees reared other livestock species, such as ruminants and/or poultry, as well as pigs. Most interviewed owners claimed to quarantine introduced pigs from the main herd; however, few complied with industry recommendations. The results of this study suggest that pig owners (n = 13 interviewed) who currently trade their pigs informally pose few threats for the introduction of emergency animal disease. Pig keepers largely obtained their pig feed from reputable sources and appeared to have a sound understanding of swill feeding. However, the lack of on-farm biosecurity, variable quarantine practices and the failure to keep health records could play a role in the spread of an emergency animal disease if it was to be introduced. Further work is being undertaken to determine, qualitatively, the risk associated with the management practices undertaken by informal pig traders and Foot and Mouth Disease and Classical Swine Fever introduction and spread.


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