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8. Whole-Genome Sequence Analysis of Pseudorabies Virus Clinical Isolates from Pigs in China between 2012 and 2017 in China

Author

Hu, Ruiming, primary, Wang, Leyi, additional, Liu, Qingyun, additional, Hua, Lin, additional, Huang, Xi, additional, Zhang, Yue, additional, Fan, Jie, additional, Chen, Hongjian, additional, Song, Wenbo, additional, Liang, Wan, additional, Ding, Nengshui, additional, Li, Zuohua, additional, Ding, Zhen, additional, Tang, Xibiao, additional, Peng, Zhong, additional, and Wu, Bin, additional

Published
2021
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11. New variants of porcine epidemic diarrhea virus, China, 2011

Author

Li, Wentao, Li, Heng, Liu, Yunbo, Pan, Yongfei, Deng, Feng, Song, Yanhua, Tang, Xibiao, and He, Qigai

Subjects
Epidemics -- South Korea -- China -- Health aspects, Genes -- Health aspects, Swine -- Health aspects, Diarrhea -- Health aspects, Pork industry -- Health aspects, RNA -- Health aspects, Health
Abstract

A member of the family Coronaviridae, genus alphacoronavirus, porcine epidemic diarrhea virus (PEDV) is an enveloped, single-stranded positive-sense RNA virus (1). PEDV is the major causative agent of porcine epidemic [...]

Published
2012
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12. Comparative Genome Analysis of a Pathogenic Erysipelothrix rhusiopathiae Isolate WH13013 from Pig Reveals Potential Genes Involve in Bacterial Adaptions and Pathogenesis

Author

Yang, Longsheng, primary, Zhu, Yongwei, additional, Peng, Zhong, additional, Ding, Yi, additional, Jie, Kai, additional, Wang, Zijian, additional, Peng, Ying, additional, Tang, Xibiao, additional, Wang, Xiangru, additional, Chen, Huanchun, additional, and Tan, Chen, additional

Published
2020
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14. Clonal analysis and virulent traits of pathogenic extraintestinal Escherichia coli isolates from swine in China

Author

Ding Yi, Tang Xibiao, Lu Ping, Wu Bin, Xu Zhuofei, Liu Wugang, Zhang Ruixuan, Bei Weicheng, Chen Huanchun, and Tan Chen

Subjects
Extraintestinal Escherichia coli, MLST, Virulence gene, Pig, Veterinary medicine, SF600-1100
Abstract

Abstract Background Extraintestinal pathogenic Escherichia coli (ExPEC) can cause a variety of infections outside the gastrointestinal tract in humans and animals. Infections due to swine ExPECs have been occurring with increasing frequency in China. These ExPECs may now be considered a new food-borne pathogen that causes cross-infections between humans and pigs. Knowledge of the clonal structure and virulence genes is needed as a framework to improve the understanding of phylogenetic traits of porcine ExPECs. Results Multilocus sequence typing (MLST) data showed that the isolates investigated in this study could be placed into four main clonal complexes, designated as CC10, CC1687, CC88 and CC58. Strains within CC10 were classified as phylogroup A, and these accounted for most of our porcine ExPEC isolates. Isolates in the CC1687 clonal complex, formed by new sequence types (STs), was classified as phylogroup D, with CC88 isolates considered as B2 and CC58 isolates as B1. Porcine ExPECs in these four clonal complexes demonstrated significantly different virulence gene patterns. A few porcine ExPECs were indentified in phylogroup B2, the phylogroup in which human ExPECs mainly exist. However some STs in the four clonal groups of porcine ExPECs were reported to cause extraintestinal infections in human, based on data in the MLST database. Conclusion Porcine ExPECs have different virulence gene patterns for different clonal complexes. However, these strains are mostly fell in phylogenentic phylogroup A, B1 and D, which is different from human ExPECs that concentrate in phylogroup B2. Our findings provide a better understanding relating to the clonal structure of ExPECs in diseased pigs and indicate a need to re-evaluate their contribution to human ExPEC diseases.

Published
2012
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16. Epidemiological and genetic characteristics of swine pseudorabies virus in mainland China between 2012 and 2017

Author

Sun, Ying, primary, Liang, Wan, additional, Liu, Qingyun, additional, Zhao, Tingting, additional, Zhu, Hechao, additional, Hua, Lin, additional, Peng, Zhong, additional, Tang, Xibiao, additional, Stratton, Charles W., additional, Zhou, Danna, additional, Tian, Yongxiang, additional, Chen, Huanchun, additional, and Wu, Bin, additional

Published
2018
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17. Genome analysis and in vivo virulence of porcine extraintestinal pathogenic Escherichia coli strain PCN033

Author

Liu, Canying, primary, Zheng, Huajun, additional, Yang, Minjun, additional, Xu, Zhuofei, additional, Wang, Xiangru, additional, Wei, Liuya, additional, Tang, Biao, additional, Liu, Feng, additional, Zhang, Yanyan, additional, Ding, Yi, additional, Tang, Xibiao, additional, Wu, Bin, additional, Johnson, Timothy J., additional, Chen, Huanchun, additional, and Tan, Chen, additional

Published
2015
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18. Subcutaneous Vaccination with Attenuated Salmonella enterica Serovar Choleraesuis C500 Expressing Recombinant Filamentous Hemagglutinin and Pertactin Antigens Protects Mice against Fatal Infections with both S. enterica Serovar Choleraesuis and Bordetella bronchiseptica▿

Author

Zhao, Zhanqin, Xue, Yun, Wu, Bin, Tang, Xibiao, Hu, Ruiming, Xu, Yindi, Guo, Aizhen, and Chen, Huanchun

Subjects
Pertussis Vaccine, Mice, Inbred BALB C, Salmonella Infections, Animal, Salmonella Vaccines, Injections, Subcutaneous, Colony Count, Microbial, Administration, Oral, Salmonella enterica, Enzyme-Linked Immunosorbent Assay, Bordetella bronchiseptica, Antibodies, Bacterial, Survival Analysis, Immunoglobulin A, Mice, Peyer's Patches, Immunoglobulin G, Microbial Immunity and Vaccines, Animals, Female, Virulence Factors, Bordetella, Adhesins, Bacterial, Lung, Bacterial Outer Membrane Proteins, Bordetella Infections
Abstract

Salmonella enterica serovar Choleraesuis strain C500 is a live, attenuated vaccine that has been used in China for over 40 years to prevent piglet paratyphoid. We compared the protective efficacies of subcutaneous (s.c.) and oral vaccination of BALB/c mice with C500 expressing the recombinant filamentous hemagglutinin type I domain and pertactin region 2 domain antigen (rF1P2) of Bordetella bronchiseptica. Protective efficacy against both S. enterica serovar Choleraesuis infection in an oral fatal challenge model and B. bronchiseptica infection in a model of fatal acute pneumonia was evaluated. Both the s.c. and oral vaccines conferred complete protection against fatal infection with the virulent parent S. enterica serovar Choleraesuis strain (C78-1). All 20 mice vaccinated s.c. survived intranasal challenge with four times the 50% lethal dose of virulent B. bronchiseptica (HH0809) compared with 4 of 20 vector-treated controls and 1 of 18 phosphate-buffered saline-treated controls that survived, but no significant protection against HH0809 was observed in orally vaccinated animals. Both the s.c. and oral vaccines elicited rF1P2-specific serum immunoglobulin G (IgG) and IgA antibodies. However, lung homogenates from s.c. vaccinated animals had detectably high levels of rF1P2-specific IgG and IgA; a much lower level of rF1P2-specific IgG was detected in samples from orally vaccinated mice, and the latter showed no evidence of local IgA. Furthermore, a more abundant and longer persistence of vaccine organisms was observed in the lungs of mice immunized s.c. than in those of mice immunized orally. Our results suggest that s.c. rather than oral vaccination is more efficacious in protecting mice from fatal challenge with B. bronchiseptica.

Published
2008

22. Subcutaneous Vaccination with Attenuated Salmonella enterica Serovar Choleraesuis C500 Expressing Recombinant Filamentous Hemagglutinin and Pertactin Antigens Protects Mice against Fatal Infections with both S. enterica Serovar Choleraesuis and Bordetella bronchiseptica

Author

Zhao, Zhanqin, primary, Xue, Yun, additional, Wu, Bin, additional, Tang, Xibiao, additional, Hu, Ruiming, additional, Xu, Yindi, additional, Guo, Aizhen, additional, and Chen, Huanchun, additional

Published
2008
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23. Isolation, Antimicrobial Resistance, and Virulence Genes of Pasteurella multocidaStrains from Swine in China

Author

Tang, Xibiao, Zhao, Zhanqin, Hu, Junyong, Wu, Bin, Cai, Xuwang, He, Qigai, and Chen, Huanchun

Abstract

ABSTRACTA total of 233 isolates of Pasteurella multocidawere obtained from 2,912 cases of clinical respiratory disease in pigs in China, giving an isolation rate of 8.0%. Serogroup A P. multocidaisolates were isolated from 92 cases (39.5%), and serogroup D isolates were isolated from 128 cases (54.9%); 12 isolates (5.2%) were untypeable. P. multocidawas the fourth most frequent pathogenic bacterium recovered from the respiratory tract, after Streptococcus suis, Haemophilus parasuis, and Escherichia coli. All isolates were characterized for their susceptibilities to 20 antibiotics and the presence of 19 genes for virulence factors (VFs). The frequency of antimicrobial resistance among P. multocidaisolates from swine in China was higher than that reported among P. multocidaisolates from swine in from other countries, and 93.1% of the isolates showed multiple-drug resistance. There was a progressive increase in the rate of multiresistance to more than seven antibiotics, from 16.2% in 2003 to 62.8% in 2007. The resistance profiles suggested that cephalosporins, florfenicol, and fluoroquinolones were the drugs most likely to be active against P. multocida. Use of PCR showed that colonization factors (ptfA, fimA, and hsf-2), iron acquisition factors, sialidases (nanH), and outer membrane proteins occurred in most porcine strains. The VFs pfhA, tadD, toxA, and pmHASwere each present in <50% of strains. The various VFs exhibited distinctive associations with serogroups: concentrated in serogroup A, concentrated in serogroup D, or occurring jointly in serogroups A and D. These findings provide novel insights into the epidemiological characteristics of porcine P. multocidaisolates and suggest that the potential threat of such multiresistant bacteria in food-producing animals should not be neglected.

Published
2009
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24. Subcutaneous Vaccination with Attenuated Salmonella entericaSerovar Choleraesuis C500 Expressing Recombinant Filamentous Hemagglutinin and Pertactin Antigens Protects Mice against Fatal Infections with both S. entericaSerovar Choleraesuis and Bordetella bronchiseptica

Author

Zhao, Zhanqin, Xue, Yun, Wu, Bin, Tang, Xibiao, Hu, Ruiming, Xu, Yindi, Guo, Aizhen, and Chen, Huanchun

Abstract

ABSTRACTSalmonella entericaserovar Choleraesuis strain C500 is a live, attenuated vaccine that has been used in China for over 40 years to prevent piglet paratyphoid. We compared the protective efficacies of subcutaneous (s.c.) and oral vaccination of BALB/c mice with C500 expressing the recombinant filamentous hemagglutinin type I domain and pertactin region 2 domain antigen (rF1P2) of Bordetella bronchiseptica. Protective efficacy against both S. entericaserovar Choleraesuis infection in an oral fatal challenge model and B. bronchisepticainfection in a model of fatal acute pneumonia was evaluated. Both the s.c. and oral vaccines conferred complete protection against fatal infection with the virulent parent S. entericaserovar Choleraesuis strain (C78-1). All 20 mice vaccinated s.c. survived intranasal challenge with four times the 50% lethal dose of virulent B. bronchiseptica(HH0809) compared with 4 of 20 vector-treated controls and 1 of 18 phosphate-buffered saline-treated controls that survived, but no significant protection against HH0809 was observed in orally vaccinated animals. Both the s.c. and oral vaccines elicited rF1P2-specific serum immunoglobulin G (IgG) and IgA antibodies. However, lung homogenates from s.c. vaccinated animals had detectably high levels of rF1P2-specific IgG and IgA; a much lower level of rF1P2-specific IgG was detected in samples from orally vaccinated mice, and the latter showed no evidence of local IgA. Furthermore, a more abundant and longer persistence of vaccine organisms was observed in the lungs of mice immunized s.c. than in those of mice immunized orally. Our results suggest that s.c. rather than oral vaccination is more efficacious in protecting mice from fatal challenge with B. bronchiseptica.

Published
2008
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