• Title/Summary/Keyword: Epidemic outbreak

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A Study on the Management System of Bioterrorism by the Phases of Crisis Management (위기관리단계별 생물테러 관리체계에 관한 연구)

  • Kim, Chang-Ho;Lee, Kwang-Lyeol
    • Korean Security Journal
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    • no.13
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    • pp.113-144
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    • 2007
  • The entire world has lived in terror threatened by new-terrorism since the 9.11 terror. Having appeared since 9.11, new-terrorism is new kind of terror targeting victims at random. Bioterrorism is one good example. Since bioterrorism happens secretly, it's hard to identify. The case becomes even harder to detect if it takes the form of a new epidemic. This study set out to apply the four phases of crisis management regarding outbreak and measures of SARS, the latest new epidemic, and to prepare against bioterrorism taking the form of a new epidemic, It also shows the efforts to study what to prepare and what kind of actions to take in case of bioterrorism by applying the four phases. There results demonstrate that the preventive measures against bioterrorism include arranging terror-related laws and identifying and monitoring expected pathogenic organs. In the preparation phases, they should integrate the related agencies, prepare for the standard operating procedures(SOP), execute integrated training sessions among the related agencies, and secure the necessary resources such as vaccine, cures, and exploration devices. In the response phases, they need to set up a rapid diagnosis system, quarantine and then cure the patients, and pursue cooperation from the media and promotions and further an international cooperation system to take appropriate measures. And the final recovery phases should involve offering emergency support by checking the situations and engaging in activities to prevent another terror attack by providing counseling, exchanging information, and analyzing and evaluating the causes.

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Epidemiological Observation on the Current Epidemic of Human Trypanosomiasis in Uganda (우간다의 Human Trypanosomiasis 대유행(大流行)에 관한 역학적(疫學的) 관찰(觀察))

  • Chu, He-Len;Rim, Hang-Jong;Chu, I.H.;Ongom, V.L.
    • Journal of agricultural medicine and community health
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    • v.5 no.1
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    • pp.5-15
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    • 1980
  • The first recorded trypanosomiasis epidemic in Uganda took place at the beginning of this century in the islands and in a strip along the northern shores of Lake Victoria, which resulted in deaths of 1/3 million people. The disease was partly controlled by early 1930's and continued to occur sporadically in certain localized foci. The disease has however flared up in an explosive outbreak in Busoga district along Lake Victoria since 1977. The incidence of disease in northern district adjacent to Southern Sudan is also increasing lately. This paper describes the three month observation on the surveillance and control activities in the epidemic areas and of various health units including the Vector Control Division, the Tsetse fly Control Division, Tororo Trypanosomiasis Research Institute, medical units in Busoga, and Acholi districts. Data analysis and review were made of disease information so far collected by various health units in the Ministry of Health and district health offices. The findings may be summarized in the following: 1) A total of 12, 100 patients and 38 deaths: have occured in Busoga district since 1977 onward, and over 100 cases of diseases arc occuring in the Northern region bordering Southern Sudan. 2) the distribution of trypanosomiasis is characterized with two district patterns. The disease caused by Trypanosoma rhodesiense occurs in Busoga and is transmitted by Glossina palpalis, G. fuscipes infested in the islands and in the northern shore of forests of Lake Victoria. Another type caused by Trypanosoma gambiense occurs in Madi and Acholi in the north and is transmitted by Glossina morsitans in Savannah. 3) The house survey in Rusoga indicated that most of patients keep domestic animals in their house premises, and are engaging in either farming or fishing. Practically all the patients remembered that they had been bitten by tsetse in the field. 4) The routine diagnostic methods in the hospital laboratory is carried out through the microscopic examination of trypanosome with Giemsa stain of blood and cerebro-spinal fluid, The measurement of ESR and IgM has been used by Tororo Tryponosomiasis Research Institute for field screening.

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Properties of a Social Network Topology of Livestock Movements to Slaughterhouse in Korea (도축장 출하차량 이동의 사회연결망 특성 분석)

  • Park, Hyuk;Bae, Sunhak;Pak, Son-Il
    • Journal of Veterinary Clinics
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    • v.33 no.5
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    • pp.278-285
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    • 2016
  • Epidemiological studies have shown the association between transportation of live animals and the potential transmission of infectious disease between premises. This finding was also observed in the 2014-2015 foot-and-mouth disease (FMD) outbreak in Korea. Furthermore, slaughterhouses played a key role in the global spread of the FMD virus during the epidemic. In this context, in-depth knowledge of the structure of direct and indirect contact between slaughterhouses is paramount for understanding the dynamics of FMD transmission. But the social network structure of vehicle movements to slaughterhouses in Korea remains unclear. Hence, the aim of this study was to configure a social network topology of vehicle movements between slaughterhouses for a better understanding of how they are potentially connected, and to explore whether FMD outbreaks can be explained by the network properties constructed in the study. We created five monthly directed networks based on the frequency and chronology of on- and off-slaughterhouse vehicle movements. For the monthly network, a node represented a slaughterhouse, and an edge (or link) denoted vehicle movement between two slaughterhouses. Movement data were retrieved from the national Korean Animal Health Integrated System (KAHIS) database, which tracks the routes of individual vehicle movements using a global positioning system (GPS). Electronic registration of livestock movements has been a mandatory requirement since 2013 to ensure traceability of such movements. For each of the five studied networks, the network structures were characterized by small-world properties, with a short mean distance, a high clustering coefficient, and a short diameter. In addition, a strongly connected component was observed in each of the created networks, and this giant component included 94.4% to 100% of all network nodes. The characteristic hub-and-spoke type of structure was not identified. Such a structural vulnerability in the network suggests that once an infectious disease (such as FMD) is introduced in a random slaughterhouse within the cohesive component, it can spread to every other slaughterhouse in the component. From an epidemiological perspective, for disease management, empirically derived small-world networks could inform decision-makers on the higher potential for a large FMD epidemic within the livestock industry, and could provide insights into the rapid-transmission dynamics of the disease across long distances, despite a standstill of animal movements during the epidemic, given a single incursion of infection in any slaughterhouse in the country.

Outbreak of Phytophthora Rot on Pear Under Environmental Conditions Favorable to the Disease

  • Jee, Hyeong-Jin;Cho, Weon-Dae;Nam, Ki-Woong;Park, Young-Seob
    • The Plant Pathology Journal
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    • v.17 no.4
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    • pp.231-235
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    • 2001
  • From April to May 1998, Phytophthora rot on pear, which has not been reported in Korea before, became an epidemic in the southeast part of the country under abnormally higher temperature and prolonged rainy days. Average temperature was about $3^{\circ}$ higher than in normal years, and 29 days were rainy during the 2 months in the areas surveyed. Over 1,000 orchards estimated at about 270 ha in 19 cultivation areas were infected by the disease, which occurred on all parts of the tree such as leaves, shoots, branches, stems, and flower clusters. Among 43 isolates collected from various locations and plant parts, 41 were identified as Phytophthora cactorum while 2 were identified as P. cambivora based on their mycological characteristics. The representative isolates revealed strong pathogenicity not only to pear but also to apple and peach. Among 23 pear cultivars tested, 7 were estimated as susceptible, 4 were moderate, and 11 were resistant to the pathogen. Results suggest that Phytophthora disease on pear is a potential threat to pear cultivation when environmental factors are favorable to disease development.

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Genotype Analyses of Methicillin Resistant Staphylococcus aureus Isolated from Intensive Care Units (중환자실에서 분리된 Methicillin 내성 Staphylococcus aureus의 유전자형 분석)

  • Kim, Yun-Kyung;Gwak, Mi-Kyung;Lee, Ji-Min;Hong, Hae-Sook
    • Journal of Korean Biological Nursing Science
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    • v.10 no.2
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    • pp.147-153
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    • 2008
  • Purpose: Methicillin Resistant Staphylococcus aureus (MRSA) has become a major clinical problem and one of the major nosocomial pathogen worldwide. The aim of the study was to investigate the epidemiological characteristics of genotypes of MRSA isolated in the A-hospital ICU. Methods: In the period between December 2007 and May 2008, MRSA was isolated from ICU patients and its surrounding environment. Polymerase Chain Reaction (PCR) was conducted for the detection of MRSA gene. The incidence of MRSA in the clinical isolates of Staphylococcus aureus was examined by using a multiplex PCR. The spa gene of Staphylococcus aureus encodes protein A and is used for typing of MRSA. We used sequence typing of the spa gene repeat region to study the epidemiology of MRSA at a hospital. Results: Two different genotypes of MRSA were identified with 90 isolated from the patients and its surrounding environments in the ICU. Conclusion: This study may contribute to the development of effective strategies for preventing nosocomial infections. Genotyping may have more general application for the study of MRSA epidemic outbreak in hospital and community infection.

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A Study of Mycoplasmal Pneumonia developed around a Chunnam Coastal Area in 1993 (1993년 전남의 한 해안지역에서 발생한 Mycoplasmal 폐렴에 대한 고찰)

  • Byun, Joo-Nam;Yang, Eun-Suck
    • Journal of agricultural medicine and community health
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    • v.18 no.2
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    • pp.161-171
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    • 1993
  • Mycoplasma pneumoniae(M. pneumoniae) is a primary pathogene of the respiratory tract in children. Most studies of such pneumonia involve a group of admitted patients in hospital, usually with major medical illness. We retrospectively studied the epidemiologic and clinical feature of 105 patients with serologically proven M. pneumoigic pneumonia treated at Gwang-Yang Hospital during a epidemic period of Jun. 1993 to Dec. 1993. All cases of pneumonia developed in this period were also reviewed and compared with serologically proven group. The results were as follows. 1. There were 63 males and 42 females, and the male /female ratio was 1.5 : 1. 2. More than half(57%) of cases belonged to 5-9 years of age group, and mean age was 6.5 years old. 3. Mean age was steadily decreased as prevalence of mycoplasmal pneumonia had been subsided. 4. The date of index case was June 26th, and that of median case was 3 months after the index case. 5. A major determinant of the outbreak seemed to be the population density rather than the population size. 6. Recurrence and serious complication were not observed in this period. 7. All cases of pneumonia developed in this period might be attributed to M. pnemoniae. These epidemiologic and clinical characteristics would contribute to the prevention and diagnosis of mycoplasmal pneumonia.

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A Study on the Air Travel Demand Forecasting using time series ARIMA-Intervention Model (ARIMA-Intervention 시계열모형을 활용한 제주 국내선 항공여객수요 추정)

  • Kim, Min-Su;Kim, Kee-Woong;Park, Sung-Sik
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.20 no.1
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    • pp.66-75
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    • 2012
  • The purpose of this study is to analyze the effect of intervention variables which may affect the air travel demand for Jeju domestic flights and to anticipate the air travel demand for Jeju domestic flights. The air travel demand forecasts for Jeju domestic flights are conducted through ARIMA-Intervention Model selecting five intervention variables such as 2002 World Cup games, SARS, novel swine-origin influenza A, Yeonpyeongdo bombardment and Japan big earthquake. The result revealed that the risk factor such as the threat of war that is a negative intervention incident and occurred in Korea has the negative impact on the air travel demand due to the response of risk aversion by users. However, when local natural disasters (earthquakes, etc) occurring in neighboring courtiers and global outbreak of an epidemic gave the negligible impact to Korea, negative intervention incident would have a positive impact on air travel demand as a response to find alternative due to rational expectation of air travel customers. Also we realize that a mega-event such as the 2002 Korea-Japan World Cup games reduced the air travel demand in a short-term period unlike the perception in which it will increase the air travel demand and travel demands in the corresponding area.

Unstable vivax malaria in Korea

  • Ree, Han-Il
    • Parasites, Hosts and Diseases
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    • v.38 no.3
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    • pp.119-138
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    • 2000
  • Korean vivax malaria had been prevalent for longtime throughout the country with low endemicity. As a result of the Korean war (1950-1953), malaria became epidemic. In 1959-1969 when the National Malaria Eradication Service (NMES) was implemented, malaria rates declined, with low endemicity in the south-west and south plain areas and high endemic foci in north Kyongsangbuk-do (province) and north and east Kyonggi-do. NMES activities greatly contributed in accelerating the control and later eradication of malaria. The Republic of Korea (South Korea) was designated malaria free in 1979. However, malaria re-emerged in 1993 and an outbreak occurred in north Kyonggi-do and north-west Kangwon-do (in and/or near the Demilitarized Zone, DMZ) , bordering North Korea. It has been postulated that most of the malaria cases resulted from bites of sporozoite-infected females of An. sinensis dispersed from North Korea across the DMZ. Judging from epidemiological and socio-ecological factors, vivax malaria would not be possible to be endemic in South Korea. Historical data show that vivax malaria in Korea is a typical unstable malaria. Epidemics may occur when environmental, socio-economical, and/or political factors change in favor to malaria transmission, and when such factors change to normal conditions malaria rates become low and may disappear. Passive case detection is a most feasible and recommendable control measure against the unstable vivax malaria in Korea in cost-effect point of view.

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The Impact of COVID-19 on Stock Price: An Application of Event Study Method in Vietnam

  • PHUONG, Lai Cao Mai
    • The Journal of Asian Finance, Economics and Business
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    • v.8 no.5
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    • pp.523-531
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    • 2021
  • Vietnam's Oil and gas industry make a significant contribution to the Gross Domestic Product of Vietnam. The ongoing COVID-19 pandemic has hit every industry hard, but perhaps the one industry which has taken the biggest hit is the global oil and gas industry. The purpose of this article is to examine how the COVID-19 pandemic affects the share price of the Vietnam Oil and Gas industry. The event study method applied to Oil and Gas industry index data around three event days includes: (i) The date Vietnam recognized the first patient to be COVID-19 positive was January 23, 2020; (ii) The second outbreak of COVID-19 infection in the community began on March 6, 2020; (iii) The date (30/3/2020) when Vietnam announced the COVID-19 epidemic in the whole territory. This study found that the share price of the Vietnam Oil and Gas industry responded positively after the event (iii) which is manifested by the cumulative abnormal return of CAR (0; 3] = 3.8% and statistically significant at 5 %. In the study, event (ii) has the most negative and strong impact on Oil and Gas stock prices. Events (i) favor negative effects, events (iii) favor positive effects, but abnormal return change sign quickly from positive to negative after the event date and statistically significant shows the change on investors' psychology.

The Changing Role of Food Delivery Apps among Hotel Guests before and after Covid 19 Pandemic

  • Soo-Hee LEE
    • East Asian Journal of Business Economics (EAJBE)
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    • v.11 no.2
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    • pp.59-70
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    • 2023
  • Purpose - The hospitality industry has experienced significant transformations in recent years, primarily driven by advancements in technology and changes in consumer behavior. The worldwide COVID-19 epidemic has intensified a trend of hotel guests increasingly relying on meal delivery applications. Considering the recent COVID-19 pandemic, this study sets out to investigate how hotel guests have been using food delivery apps before and during the outbreak. Research design, data, and methodology - This study utilizes a systematic literature review as its research design. A systematic literature review is a methodical, well-structured procedure for locating, analyzing, and synthesizing pertinent research articles. Result - The findings shed light on four main aspects: convenience and accessibility, safety and hygiene assurance, personalization and customization, and local exploration and cultural immersion. These findings provide valuable insights into the evolving preferences and behaviors of hotel guests in utilizing food delivery apps, particularly in the context of the COVID-19 pandemic. Conclusion - This study has contributed to the understanding of the changing role of food delivery apps among hotel guests. By recognizing the evolving dynamics and leveraging the opportunities presented by food delivery apps, hotels can adapt to meet guest expectations, enhance customer satisfaction, and thrive in the ever-changing landscape of the hospitality industry.