1
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Ryu S, Soares Magalhães RJ, Chun BC. The impact of expanded brucellosis surveillance in beef cattle on human brucellosis in Korea: an interrupted time-series analysis. BMC Infect Dis 2019; 19:201. [PMID: 30819243 PMCID: PMC6394004 DOI: 10.1186/s12879-019-3825-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 02/15/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Korean surveillance program for bovine brucellosis was improved by extending it to beef slaughterhouses and by pre-movement testing of bulls on May 2005 (Intervention 1). The bovine brucellosis surveillance program was further extended to beef cattle farms with more than 10 heads of cattle on June 2006 (Intervention 2). METHODS To quantify the temporal relationship between bovine and human brucellosis, a time-series analysis was conducted using Korean national notification data reported between January 2004 and December 2014. RESULTS Our findings indicate that while during the pre-intervention phase (January 2004 to March 2005) there was no significant temporal relationship between the incidences of bovine and human brucellosis, significant temporal relationships were observed after Intervention 1 (June 2005 to June 2006, no lag, β = 0.57, p = 0.04), and Intervention 2 (July 2006 to June 2007, 1-month lag, β = 0.65, p = 0.03). Furthermore, significant changes in incidence in human were observed after Intervention 1 (β = - 0.17 per 10 million-people, p = 0.03) and Intervention 2 (β = - 0.19 per 10 million-people, p = 0.04). CONCLUSIONS These findings indicated the changes of a nationwide comprehensive surveillance programme targeting all cattle is required for effective reduction in the human population.
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Affiliation(s)
- Sukhyun Ryu
- Division of Infectious Disease Control, Gyeonggi Provincial Government, Suwon, Republic of Korea.,Department of Epidemiology and Health Informatics, Graduate School of Public Health, Korea University, Seoul, Republic of Korea.,WHO Collaborating Centre for Infectious Disease Epidemiology and Control, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, Special Administrative Region, China
| | - Ricardo J Soares Magalhães
- UQ Spatial Epidemiology Laboratory, School of Veterinary Science, The University of Queensland, Gatton, Australia.,Children's Health and Environment Program, Child Health Research Centre, The University of Queensland, Brisbane, Australia
| | - Byung Chul Chun
- Department of Epidemiology and Health Informatics, Graduate School of Public Health, Korea University, Seoul, Republic of Korea. .,Department of Preventive Medicine, Korea University College of Medicine, 73 Inchon-ro, Seongbukgu, Seoul, 02841, Republic of Korea.
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2
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Ran X, Chen X, Wang M, Cheng J, Ni H, Zhang XX, Wen X. Brucellosis seroprevalence in ovine and caprine flocks in China during 2000-2018: a systematic review and meta-analysis. BMC Vet Res 2018; 14:393. [PMID: 30541567 PMCID: PMC6292006 DOI: 10.1186/s12917-018-1715-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 11/23/2018] [Indexed: 11/11/2022] Open
Abstract
Background Brucellosis remains one of the most common zoonotic diseases globally, with more than half million human cases reported annually. Brucellosis is an emerging and re-emerging disease in China since the 1990s. An infectious reservoir constituted by domestic animals with brucellosis, especially ovine and caprine herds, poses a significant threat to public health. The seroprevalence of brucellosis in sheep and goat flocks in a national context is unavailable so far. Therefore, we conducted this systematic review and meta-analysis to assess the overall status of brucellosis in sheep and goats in China in almost two decades. Results The pooled prevalence of brucellosis in ovine and caprine flocks in China increased in 2000–2009 (1.00%; 95% CI, 0.70–1.30) to 2010–2018 (3.20%; 95% CI, 2.70–3.60). The seroprevalence of brucellosis in sheep and goat flocks was higher in Eastern China, with 7.00% of positive rate, than that in any other region, especially Shandong province (18.70%). Brucellosis is highly endemic in some local regions. The high prevalence of brucellosis in agricultural regions is suggestive of a shift of geographic distribution. The pooled prevalence of brucellosis is higher in goat flocks than in sheep flocks in China. Conclusions The overall data in this meta-analysis demands comprehensive intervention measures and further surveillance to facilitate the control of brucellosis in livestock. Further studies aimed at evaluating the risk factors associated with spreads of brucellosis in domestic animals unaddressed so far, and sufficient epidemiological data is important to the exploration and understanding of the prevalent status of brucellosis throughout the country and to disease control. Electronic supplementary material The online version of this article (10.1186/s12917-018-1715-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xuhua Ran
- College of Animal Science & Veterinary Medicine, Heilongjiang Bayi Agricultural University, No.5, XinFeng Rd., Saertu District, Daqing City, 163319, Heilongjiang Province, China
| | - Xiaohong Chen
- College of Animal Science & Veterinary Medicine, Heilongjiang Bayi Agricultural University, No.5, XinFeng Rd., Saertu District, Daqing City, 163319, Heilongjiang Province, China
| | - Miaomiao Wang
- College of Animal Science & Veterinary Medicine, Heilongjiang Bayi Agricultural University, No.5, XinFeng Rd., Saertu District, Daqing City, 163319, Heilongjiang Province, China
| | - Jiajia Cheng
- College of Animal Science & Veterinary Medicine, Heilongjiang Bayi Agricultural University, No.5, XinFeng Rd., Saertu District, Daqing City, 163319, Heilongjiang Province, China
| | - Hongbo Ni
- College of Animal Science & Veterinary Medicine, Heilongjiang Bayi Agricultural University, No.5, XinFeng Rd., Saertu District, Daqing City, 163319, Heilongjiang Province, China
| | - Xiao-Xuan Zhang
- College of Animal Science & Veterinary Medicine, Heilongjiang Bayi Agricultural University, No.5, XinFeng Rd., Saertu District, Daqing City, 163319, Heilongjiang Province, China.
| | - Xiaobo Wen
- College of Animal Science & Veterinary Medicine, Heilongjiang Bayi Agricultural University, No.5, XinFeng Rd., Saertu District, Daqing City, 163319, Heilongjiang Province, China.
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3
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Leya M, Kim WK, Cho JS, Yu EC, Kim YJ, Yeo Y, Lyoo KS, Yang MS, Han SS, Lee JH, Tark D, Hur J, Kim B. Vaccination of goats with a combination Salmonella vector expressing four Brucella antigens (BLS, PrpA, Omp19, and SOD) confers protection against Brucella abortus infection. J Vet Sci 2018; 19:643-652. [PMID: 29929362 PMCID: PMC6167338 DOI: 10.4142/jvs.2018.19.5.643] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 06/02/2018] [Accepted: 06/10/2018] [Indexed: 02/06/2023] Open
Abstract
Salmonella is an intracellular pathogen with a cellular infection mechanism similar to that of Brucella, making it a suitable choice for use in an anti-Brucella immune boost system. This study explores the efficacy of a Salmonella Typhimurium delivery-based combination vaccine for four heterologous Brucella antigens (Brucella lumazine synthase, proline racemase subunit A, outer-membrane protein 19, and Cu/Zn superoxide dismutase) targeting brucellosis in goats. We inoculated the attenuated Salmonella delivery-based vaccine combination subcutaneously at two different inoculation levels; 5 × 109 colony-forming unit (CFU)/mL (Group B) and 5 × 1010 CFU/mL (Group C) and challenged the inoculations with virulent Brucella abortus at 6 weeks post-immunization. Serum immunoglobulin G titers against individual antigens in Salmonella immunized goats (Group C) were significantly higher than those of the non-immunized goats (Group A) at 3 and 6 weeks after vaccination. Upon antigenic stimulation, interferon-γ from peripheral blood mononuclear cells was significantly elevated in Groups B and C compared to that in Group A. The immunized goats had a significantly higher level of protection as demonstrated by the low bacterial loads in most tissues from the goats challenged with B. abortus. Relative real-time polymerase chain reaction results revealed that the expression of Brucella antigens was lower in spleen, kidney, and lung of immunized goats than of non-immunized animals. Also, treatment with our combination vaccine ameliorated histopathological lesions induced by the Brucella infection. Overall, the Salmonella Typhimurium delivery-based combination vaccine was effective in delivering immunogenic Brucella proteins, making it potentially useful in protecting livestock from brucellosis.
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Affiliation(s)
- Mwense Leya
- College of Veterinary Medicine, Chonbuk National University, Iksan 54596, Korea
| | - Won Kyong Kim
- College of Veterinary Medicine, Chonbuk National University, Iksan 54596, Korea
| | - Jeong Sang Cho
- College of Veterinary Medicine, Chonbuk National University, Iksan 54596, Korea
| | - Eun-Chae Yu
- Korea Zoonosis Research Institute, Chonbuk National University, Iksan 54596, Korea
| | - Young-Jee Kim
- Korea Zoonosis Research Institute, Chonbuk National University, Iksan 54596, Korea
| | - Yoonhwan Yeo
- Korea Zoonosis Research Institute, Chonbuk National University, Iksan 54596, Korea
| | - Kwang-Soo Lyoo
- Korea Zoonosis Research Institute, Chonbuk National University, Iksan 54596, Korea
| | - Myeon-Sik Yang
- College of Veterinary Medicine, Chonbuk National University, Iksan 54596, Korea
| | - Sang-Seop Han
- Korea Zoonosis Research Institute, Chonbuk National University, Iksan 54596, Korea
| | - John Hwa Lee
- College of Veterinary Medicine, Chonbuk National University, Iksan 54596, Korea
| | - Dongseob Tark
- Korea Zoonosis Research Institute, Chonbuk National University, Iksan 54596, Korea
| | - Jin Hur
- College of Veterinary Medicine, Chonbuk National University, Iksan 54596, Korea
| | - Bumseok Kim
- College of Veterinary Medicine, Chonbuk National University, Iksan 54596, Korea
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4
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Isolation and characterization of Brucella abortus isolates from wildlife species in South Korea. ACTA ACUST UNITED AC 2016. [DOI: 10.14405/kjvr.2016.56.3.147] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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5
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Truong QL, Cho Y, Park S, Park BK, Hahn TW. Brucella abortus mutants lacking ATP-binding cassette transporter proteins are highly attenuated in virulence and confer protective immunity against virulent B. abortus challenge in BALB/c mice. Microb Pathog 2016; 95:175-185. [PMID: 27057678 DOI: 10.1016/j.micpath.2016.04.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 10/23/2015] [Accepted: 04/01/2016] [Indexed: 11/30/2022]
Abstract
Brucella abortus RB51 is an attenuated vaccine strain that has been most frequently used for bovine brucellosis. Although it is known to provide good protection in cattle, it still has some drawbacks including resistance to rifampicin, residual virulence and pathogenicity in humans. Thus, there has been a continuous interest on new safe and effective bovine vaccine candidates. In the present study, we have constructed unmarked mutants by deleting singly cydD and cydC genes, which encode ATP-binding cassette transporter proteins, from the chromosome of the virulent Brucella abortus isolate from Korean cow (referred to as IVK15). Both IVK15ΔcydD and ΔcydC mutants showed increased sensitivity to metal ions, hydrogen peroxide and acidic pH, which are mimic to intracellular environment during host infection. Additionally, the mutants exhibited a significant growth defect in RAW264.7 cells and greatly attenuated in mice. Vaccination of mice with either IVK15ΔcydC or IVK15ΔcydD mutant could elicit an anti-Brucella specific immunoglobulin G (IgG) and IgG subclass responses as well as enhance the secretion of interferon-gamma, and provided better protection against challenge with B. abortus strain 2308 than with the commercial B. abortus strain RB51 vaccine. Collectively, these results suggest that both IVK15ΔcydC and IVK15ΔcydD mutants could be an attenuated vaccine candidate against B. abortus.
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Affiliation(s)
- Quang Lam Truong
- College of Veterinary Medicine, Kangwon National University, Chuncheon 200-701, Gangwon-do, South Korea
| | - Youngjae Cho
- College of Veterinary Medicine, Kangwon National University, Chuncheon 200-701, Gangwon-do, South Korea
| | - Soyeon Park
- College of Veterinary Medicine, Kangwon National University, Chuncheon 200-701, Gangwon-do, South Korea
| | - Bo-Kyoung Park
- College of Veterinary Medicine, Kangwon National University, Chuncheon 200-701, Gangwon-do, South Korea
| | - Tae-Wook Hahn
- College of Veterinary Medicine, Kangwon National University, Chuncheon 200-701, Gangwon-do, South Korea.
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6
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Yoon H, Moon OK, Lee SH, Lee WC, Her M, Jeong W, Jung SC, Kim DS. Epidemiology of brucellosis among cattle in Korea from 2001 to 2011. J Vet Sci 2014; 15:537-43. [PMID: 25234321 PMCID: PMC4269596 DOI: 10.4142/jvs.2014.15.4.537] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Accepted: 07/18/2014] [Indexed: 11/20/2022] Open
Abstract
In the present study, the outbreak patterns of bovine brucellosis in Korea from 2000 to 2011 were analyzed to understand the epidemiological evolution of this disease in the country. A total of 85,521 brucella reactor animals were identified during 14,215 outbreaks over the 12-year study period. The number of bovine brucellosis cases increased after 2003 and peaked in 2006 before decreasing thereafter. The majority of the bovine brucellosis cases were Korean native cattle, Han Woo. The numbers of human brucellosis cases and cattle outbreaks increased and decreased in the same pattern. The correlation coefficient for human and bovine cases per year was 0.96 (95% confidence interval = 0.86~0.99; p < 10-3). The epidemiological characteristics of bovine brucellosis appeared to be affected by the intensity of eradication programs that mainly involved a test-and-slaughter policy. Findings from the present study were based on freely available statistics from web pages maintained by government agencies. This unlimited access to information demonstrates the usefulness of government statistics for continually monitoring the health of animal populations.
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Affiliation(s)
- Hachung Yoon
- Division of Veterinary Epidemiology, Animal and Plant Quarantine Agency, Anyang 430-757,
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7
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A new Brucella canis species-specific PCR assay for the diagnosis of canine brucellosis. Comp Immunol Microbiol Infect Dis 2014; 37:237-41. [DOI: 10.1016/j.cimid.2014.07.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 06/30/2014] [Accepted: 07/13/2014] [Indexed: 11/22/2022]
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8
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Truong QL, Seo TW, Yoon BI, Kim HC, Han JH, Hahn TW. Prevalence of swine viral and bacterial pathogens in rodents and stray cats captured around pig farms in Korea. J Vet Med Sci 2013; 75:1647-50. [PMID: 23892461 PMCID: PMC3942947 DOI: 10.1292/jvms.12-0568] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
In 2008, 102 rodents and 24
stray cats from the areas around 9 pig farms in northeast South Korea were used to
determine the prevalence of the following selected swine pathogens: ten viral pathogens
[porcine epidemic diarrhea virus (PEDV), transmissible gastroenteritis virus (TGEV),
rotavirus, classical swine fever virus (CSFV), porcine circovirus type 2 (PCV2),
encephalomyocarditis virus (EMCV), porcine reproductive and respiratory syndrome virus
(PRRSV), porcine parvovirus (PPV), pseudorabies virus (PRV) and Japanese encephalitis
virus (JEV)] and four bacterial pathogens (Brucella,
Leptospira, Salmonella and Lawsonia
intracellularis). In total, 1,260 tissue samples from 102 rodents and 24 stray
cats were examined by specific PCR and RT-PCR assays, including tissue samples of the
brain, tonsils, lungs, heart, liver, kidneys, spleen, small intestine, large intestine and
mesenteric lymph nodes. The percentages of PCR-positive rodents for the porcine pathogens
were as follows: 63.7% for Leptospira, 39.2% for
Brucella, 6.8% for Salmonella, 15.7% for L.
intracellularis, 14.7% for PCV2 and 3.9% for EMCV. The percentages of
PCR-positive stray cats for the swine pathogens were as follows: 62.5% for
Leptospira, 25% for Brucella, 12.5% for
Salmonella, 12.5% for L. intracellularis and 4.2% for
PEDV. These results may be helpful for developing control measures to prevent the spread
of infectious diseases of pigs.
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Affiliation(s)
- Quang Lam Truong
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon, Gangwon 200-701, South Korea
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9
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Lee HS, Her M, Levine M, Moore GE. Time series analysis of human and bovine brucellosis in South Korea from 2005 to 2010. Prev Vet Med 2012; 110:190-7. [PMID: 23276400 DOI: 10.1016/j.prevetmed.2012.12.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Revised: 11/12/2012] [Accepted: 12/01/2012] [Indexed: 11/15/2022]
Abstract
Brucellosis is considered to be one of the most important zoonotic diseases in the world, affecting underdeveloped and developing countries. The primary purpose of brucellosis control is to prevent the spread of disease from animals (typically ruminants) to humans. The main objective of this study was to retrospectively develop an appropriate time series model for cattle-to-human transmission in South Korea using data from independent national surveillance systems. Monthly case counts for cattle and people as well as national population data were available for 2005-2010. The temporal relationship was evaluated using an autoregressive integrated moving average with exogenous input (ARIMAX) model [notated as ARIMA(p, d, q)-AR(p)] and a negative binomial regression (NBR) model. Human incidence rate was highly correlated to cattle incidence rate in the same month and the previous month (both r=0.82). In the final models, ARIMA (0, 1, 1)-AR (0, 1) was determined as the best fit with 191.5% error in the validation phase, whereas the best NBR model including lags (0, 1 months) for the cattle incidence rate yielded a 131.9% error in the validation phase. Error (MAPE) rates were high due to small absolute human case numbers (typically less than 10 per month in the validation phase). The NBR model however was able to demonstrate a marked reduction in human case immediately following a hypothetical marked reduction in cattle cases, and may be better for public health decision making.
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Affiliation(s)
- Hu Suk Lee
- Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, 725 Harrison Street, West Lafayette, IN 47907, United States
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10
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Baek BK, Park MY, Islam MA, Khatun MM, Lee SI, Boyle SM. The first detection of Brucella canis in cattle in the Republic of Korea. Zoonoses Public Health 2011; 59:77-82. [PMID: 22339983 DOI: 10.1111/j.1863-2378.2011.01429.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Twenty mammary lymph node samples were collected from cattle on a farm in the Republic of Korea. These cattle were serologically negative for Brucella by tube agglutination test (≤ 1:50) and serum agglutination test (≤ 1:50). Out of 20 lymph node samples, two samples were positive for Brucella growth on Brucella agar as well as blood agar. Tests for urease, hydrogen sulphide and reactions against monospecific sera A and M indicated that these two isolates (No. 15 and 16) belong to the genus Brucella. Genus specific, AMOS (abortus, melitensis, ovis, suis) and Bruce-ladder multiplex polymerase chain reaction (PCR) assays confirmed the Brucella isolates as either a B. abortus or a B. canis strain. This is the first report of the occurrence of a B. canis infection in cattle in Korea. More survey data are needed to determine whether B. canis is a significant aetiology in the cases of cattle brucellosis in Korea.
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Affiliation(s)
- B K Baek
- Korean Zoonoses Research Institute, Chonbuk National University, Jeonju, Republic of Korea
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11
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TRUONG LQ, KIM JT, YOON BI, HER M, JUNG SC, HAHN TW. Epidemiological Survey for Brucella in Wildlife and Stray Dogs, a Cat and Rodents Captured on Farms. J Vet Med Sci 2011; 73:1597-601. [DOI: 10.1292/jvms.11-0222] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
| | - Jung Taek KIM
- College of Veterinary Medicine, Kangwon National University
| | - Byung-Il YOON
- College of Veterinary Medicine, Kangwon National University
| | - Moon HER
- National Veterinary Research and Quarantine Service
| | | | - Tae-Wook HAHN
- College of Veterinary Medicine, Kangwon National University
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12
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Yoon H, Moon OK, Her M, Carpenter TE, Kim YJ, Jung S, Lee SJ. Impact of bovine brucellosis eradication programs in the Republic of Korea. Prev Vet Med 2010; 95:288-91. [DOI: 10.1016/j.prevetmed.2010.04.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2009] [Revised: 04/07/2010] [Accepted: 04/08/2010] [Indexed: 10/19/2022]
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13
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Islam MA, Khatun MM, Baek BK, Lee SI. Efficacy of strain RB51 vaccine in protecting infection and vertical transmission against Brucella abortus in Sprague-Dawley rats. J Vet Sci 2009; 10:211-8. [PMID: 19687621 PMCID: PMC2801131 DOI: 10.4142/jvs.2009.10.3.211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Immunizing animals in the wild against Brucella (B.) abortus is essential to control bovine brucellosis because cattle can get the disease through close contact with infected wildlife. The aim of this experiment was to evaluate the effectiveness of the B. abortus strain RB51 vaccine in protecting infection as well as vertical transmission in Sprague-Dawley (SD) rats against B. abortus biotype 1. Virgin female SD rats (n = 48) two months of age were divided into two groups: one group (n = 24) received RB51 vaccine intraperitoneally with 3 × 1010 colony forming units (CFU) and the other group (n = 24) was used as non-vaccinated control. Non-vaccinated and RB51-vaccinated rats were challenged with 1.5 × 109 CFU of virulent B. abortus biotype 1 six weeks after vaccination. Three weeks after challenge, all rats were bred. Verification of RB51-vaccine induced protection in SD rats was determined by bacteriological, serological and molecular screening of maternal and fetal tissues at necropsy. The RB51 vaccine elicited 81.25% protection in SD rats against infection with B. abortus biotype 1. Offspring from rats vaccinated with RB51 had a decreased (p < 0.05) prevalence of vertical transmission of B. abortus biotype 1 compared to the offspring from non-vaccinated rats (20.23% and 87.50%, respectively). This is the first report of RB51 vaccination efficacy against the vertical transmission of B. abortus in the SD rat model.
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Affiliation(s)
- Md Ariful Islam
- Korean Zoonoses Research Institute, Chonbuk National University, Jeonju 561-756, Korea
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14
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Her M, Kang SI, Cho DH, Cho YS, Hwang IY, Heo YR, Jung SC, Yoo HS. Application and evaluation of the MLVA typing assay for the Brucella abortus strains isolated in Korea. BMC Microbiol 2009; 9:230. [PMID: 19863821 PMCID: PMC2774859 DOI: 10.1186/1471-2180-9-230] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2009] [Accepted: 10/29/2009] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND A Brucella eradication program has been executed in Korea. To effectively prevent and control brucellosis, a molecular method for genetic identification and epidemiological trace-back must be established. As part of that, the MLVA typing assay was evaluated and applied to B. abortus isolates for analyzing the characteristics of the regional distribution and relationships of foreign isolates. RESULTS A total of 177 isolates originating from 105 cattle farms for the period 1996 to 2008 were selected as representatives for the nine provinces of South Korea. A dendrogram of strain relatedness was constructed in accordance with the number of tandem repeat units for 17 loci so that it was possible to trace back in the restricted areas. Even in a farm contaminated by one source, however, the Brucella isolates showed an increase or decrease in one TRs copy number at some loci with high DI values. Moreover, those 17 loci was confirmed in stability via in-vitro and in-vivo passage, and found to be sufficiently stable markers that can readily identify the inoculated strain even if minor changes were detected. In the parsimony analysis with foreign Brucella isolates, domestic isolates were clustered distinctively, and located near the Central and Southern American isolates. CONCLUSION The MLVA assay has enough discrimination power in the Brucella species level and can be utilized as a tool for the epidemiological trace-back of the B. abortus isolates. But it is important to consider that Brucella isolates may be capable of undergoing minor changes at some loci in the course of infection or in accordance with the changes of the host.
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Affiliation(s)
- Moon Her
- OIE Reference Laboratory for Brucellosis & Zoonosis Laboratory, Bacteriology and Parasitology Division, Veterinary Research Department, National Veterinary Research and Quarantine Service (NVRQS), Anyang, Gyeonggi, Republic of Korea
| | - Sung-Il Kang
- OIE Reference Laboratory for Brucellosis & Zoonosis Laboratory, Bacteriology and Parasitology Division, Veterinary Research Department, National Veterinary Research and Quarantine Service (NVRQS), Anyang, Gyeonggi, Republic of Korea
| | - Dong-Hee Cho
- OIE Reference Laboratory for Brucellosis & Zoonosis Laboratory, Bacteriology and Parasitology Division, Veterinary Research Department, National Veterinary Research and Quarantine Service (NVRQS), Anyang, Gyeonggi, Republic of Korea
| | - Yun-Sang Cho
- OIE Reference Laboratory for Brucellosis & Zoonosis Laboratory, Bacteriology and Parasitology Division, Veterinary Research Department, National Veterinary Research and Quarantine Service (NVRQS), Anyang, Gyeonggi, Republic of Korea
| | - In-Yeong Hwang
- OIE Reference Laboratory for Brucellosis & Zoonosis Laboratory, Bacteriology and Parasitology Division, Veterinary Research Department, National Veterinary Research and Quarantine Service (NVRQS), Anyang, Gyeonggi, Republic of Korea
| | - Young-Ran Heo
- Department of Food and Nutrition, Chonnam National University, Yongbongdong, Gwangju, Republic of Korea
| | - Suk-Chan Jung
- OIE Reference Laboratory for Brucellosis & Zoonosis Laboratory, Bacteriology and Parasitology Division, Veterinary Research Department, National Veterinary Research and Quarantine Service (NVRQS), Anyang, Gyeonggi, Republic of Korea
| | - Han-Sang Yoo
- Department of Infectious Diseases, College of Veterinary Medicine, Brain Korea 21 for Veterinary Science, KRF Zoonotic Disease Priority Research Institute, Seoul National University, Gwanak, Seoul, Republic of Korea
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15
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Wee SH, Kim CH, More SJ, Nam HM. Mycobacterium bovis in Korea: an update. Vet J 2009; 185:347-50. [PMID: 19713136 DOI: 10.1016/j.tvjl.2009.07.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2009] [Revised: 06/30/2009] [Accepted: 07/01/2009] [Indexed: 10/20/2022]
Abstract
This paper reports changes in the cattle population and the incidence of bovine tuberculosis in the Republic of Korea between 1960 and 2007, and discusses potential factors contributing to the recently observed increase in disease incidence, particularly in beef cattle and deer. Although there have been ongoing refinements to the existing programme, further improvements in current strategies are needed, including surveillance of susceptible animal species, both domestic and wild, and ongoing surveillance of the human population.
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Affiliation(s)
- Sung-Hwan Wee
- National Veterinary Research and Quarantine Service, Anyang, Gyeonggi-do 430-824, Republic of Korea
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Molecular typing for epidemiological evaluation of Brucella abortus and Brucella canis isolated in Korea. J Microbiol Methods 2009; 78:144-9. [DOI: 10.1016/j.mimet.2009.05.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2008] [Revised: 04/17/2009] [Accepted: 05/07/2009] [Indexed: 11/20/2022]
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Islam MA, Khatun MM, Baek BK, Lee I. Effects of Brucella abortus biotype 1 infection on the reproductive performance of Sprague-Dawley rats. Pak J Biol Sci 2009; 12:353-9. [PMID: 19579969 DOI: 10.3923/pjbs.2009.353.359] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The aim of this study was to assess the impact of Brucella abortus biotype 1 infection on the reproductive performance using Sprague-Dawley (SD) rat model. Virgin female SD rats (n = 24) were infected intraperitoneally with 0.1 mL of saline containing 1 x 10(11) Colony Forming Unit (CFU) of pathogenic B. abortus biotype 1 Korean bovine isolate. Control rats (n = 24) were inoculated with 0.1 mL of apyrogenic saline. Both inoculated and control rats were divided into six subgroups. Four rats in each subgroup were consistently bred at 3, 7, 14, 21, 28 and 60 days after infection. B. abortus infection induced 41.67% infertility in the infected rats. The mean number of offspring/litter was 8.71 +/- 2.01 for infected rats and 12.87 +/- 1.42 for control rats (p < 0.001). The mean weight of the viable offspring was 6.10 +/- 0.36 g for infected rats and 7.15 +/- 0.40 g for control rats (p < 0.001). The rate of stillbirth was 12.30% in the infected rats. B. abortus biotype 1 was isolated from the uteri of the infected rats. The data of this study indicate that B. abortus biotype 1 infections in SD rat model affect reproduction adversely by causing infertility, stillbirth and loss of number and weight of offspring.
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Affiliation(s)
- Md Ariful Islam
- College of Veterinary Medicine, Chonbuk National University, Jeonju 561-756, Republic of Korea
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18
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Surveillance and control of bovine brucellosis in the Republic of Korea during 2000–2006. Prev Vet Med 2009; 90:66-79. [DOI: 10.1016/j.prevetmed.2009.03.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2008] [Revised: 03/05/2009] [Accepted: 03/08/2009] [Indexed: 11/17/2022]
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