1.The combination of deoxynivalenol and zearalenone at permitted feed concentrations causes serious physiological effects in young pigs.
Feng CHEN ; Yulin MA ; Chunyi XUE ; Jingyun MA ; Qingmei XIE ; Genhu WANG ; Yingzuo BI ; Yongchang CAO
Journal of Veterinary Science 2008;9(1):39-44
This study was to investigate the effects of the combination of deoxynivalenol (DON) and zearalenone (ZON) on pigs. Twenty-four weaning piglets were divided into a control group fed a diet free of mycotoxins and a toxin group fed a diet containing 1 mg/kg DON and 250 microgram/kg ZON. The results showed that supplementation of DON and ZON in diets had extensive effects on pigs. More specifically, DON and ZON caused levels of total protein, albumin, and globulin in sera to decrease (p < 0.05) by 14.5%, 6.5% and 11.3%, respectively, and at the same time increased (p < 0.05) the serum enzyme activities of gamma-glutamyltransferase, aspartate aminotransferase and alanine aminotransferase by 72.0%, 32.6% and 36.6%, respectively. In addition, DON and ZON decreased (p < 0.05) the level of anticlassical swine fever antibody titers by 14.8%. Real-time PCR showed that DON and ZON caused the mRNA expression levels of IFN-gamma, TNF-alpha, IL-2, to decrease (p < 0.05) by 36.0%, 29.0% and 35.4%, respectively. Histopathological studies demonstrated that DON and ZON caused abnormalities in the liver, spleen, lymph nodes, uterus, and kidney. The concentrations of DON and ZON used in this study are in line with the published critical values permitted by BML. Our study clearly put the standard and adequacy of safety measures for these toxins into question. The authors suggest that with the increasing availability of cellular and molecular technologies, it is time to revisit the safety standards for toxins in feeds so as to make feeds safer, providing consumers with safer products.
Animal Feed/*analysis
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Animal Nutritional Physiological Phenomena
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Animals
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Diet/veterinary
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Drug Therapy, Combination
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Female
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Swine
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Swine Diseases/blood/*chemically induced/*physiopathology
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Trichothecenes/*administration & dosage/*adverse effects/pharmacology
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Zearalenone/*administration & dosage/*adverse effects/pharmacology
2.Production and immunogenicity of chimeric virus-like particles containing the spike glycoprotein of infectious bronchitis virus.
Lishan LV ; Xiaoming LI ; Genmei LIU ; Ran LI ; Qiliang LIU ; Huifang SHEN ; Wei WANG ; Chunyi XUE ; Yongchang CAO
Journal of Veterinary Science 2014;15(2):209-216
Infectious bronchitis virus (IBV) poses a severe threat to the poultry industry and causes heavy economic losses worldwide. Vaccination is the most effective method of preventing infection and controlling the spread of IBV, but currently available inactivated and attenuated virus vaccines have some disadvantages. We developed a chimeric virus-like particle (VLP)-based candidate vaccine for IBV protection. The chimeric VLP was composed of matrix 1 protein from avian influenza H5N1 virus and a fusion protein neuraminidase (NA)/spike 1 (S1) that was generated by fusing IBV S1 protein to the cytoplasmic and transmembrane domains of NA protein of avian influenza H5N1 virus. The chimeric VLPs elicited significantly higher S1-specific antibody responses in intramuscularly immunized mice and chickens than inactivated IBV viruses. Furthermore, the chimeric VLPs induced significantly higher neutralization antibody levels than inactivated H120 virus in SPF chickens. Finally, the chimeric VLPs induced significantly higher IL-4 production in mice. These results demonstrate that chimeric VLPs have the potential for use in vaccines against IBV infection.
Animals
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Antibodies, Viral/blood
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*Chickens
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Chimera/genetics/immunology
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Coronavirus Infections/prevention & control/*veterinary/virology
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Female
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*Immunity, Innate
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Infectious bronchitis virus/genetics/*immunology
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Influenza A Virus, H5N1 Subtype/genetics/immunology
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Injections, Intramuscular/veterinary
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Mice
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Mice, Inbred BALB C
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Neuraminidase/genetics
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Poultry Diseases/*prevention & control/virology
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Recombinant Fusion Proteins/genetics/immunology
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Spike Glycoprotein, Coronavirus/genetics/*immunology
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Vaccines, Synthetic/administration & dosage/genetics/immunology
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Vaccines, Virus-Like Particle/administration & dosage/genetics/*immunology
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Viral Proteins/genetics
3.Isolation of feline panleukopenia virus from Yanji of China and molecular epidemiology from 2021 to 2022
Haowen XUE ; Chunyi HU ; Haoyuan MA ; Yanhao SONG ; Kunru ZHU ; Jingfeng FU ; Biying MU ; Xu GAO
Journal of Veterinary Science 2023;24(2):e29-
Background:
Feline panleukopenia virus (FPV) is a widespread and highly infectious pathogen in cats with a high mortality rate. Although Yanji has a developed cat breeding industry, the variation of FPV locally is still unclear.
Objectives:
This study aimed to isolate and investigate the epidemiology of FPV in Yanji between 2021 and 2022.
Methods:
A strain of FPV was isolated from F81 cells. Cats suspected of FPV infection (n = 80) between 2021 and 2022 from Yanji were enrolled in this study. The capsid protein 2 (VP2) of FPV was amplified. It was cloned into the pMD-19T vector and transformed into a competent Escherichia coli strain. The positive colonies were analyzed via VP2 Sanger sequencing. A phylogenetic analysis based on a VP2 coding sequence was performed to identify the genetic relationships between the strains.
Results:
An FPV strain named YBYJ-1 was successfully isolated. The virus diameter was approximately 20–24 nm, 50% tissue culture infectious dose = 1 × 10 −4.94 /mL, which caused cytopathic effect in F81 cells. The epidemiological survey from 2021 to 2022 showed that 27 of the 80 samples were FPV-positive. Additionally, three strains positive for CPV-2c were unexpectedly found. Phylogenetic analysis showed that most of the 27 FPV strains belonged to the same group, and no mutations were found in the critical amino acids.
Conclusions
A local FPV strain named YBYJ-1 was successfully isolated. There was no critical mutation in FPV in Yanji, but some cases with CPV-2c infected cats were identified.
4.Midwives' views and experiences of providing midwifery care in the task shifting context: a meta-ethnography approach
Chunyi GU ; Xiaojiao WANG ; Lingling LI ; Yan DING ; Xu QIAN
Global Health Journal 2020;4(3):96-106
Objective: This study aimed to explore the existing knowledge about midwives' views and experiences of providing care for women in the context of task shifting.Methods: We conducted a qualitative systematic review using meta-ethnography to describe the views and experiences of midwives on providing care in the context of task shifting. Comparative textual analysis of published qualitative studies involved translation of first-order key concepts and meanings from included studies to generate second-and third-order concepts. A grid was made to identify core findings and compare them reciprocally. Results: Thirty-six qualitative studies met the inclusion criteria. The literature comprised of 32 first key concepts. Eight second-order constructs emerged, and three third-order interpretations were generated. The three overarching themes were: (1) midwives perceived themselves as providing culturally competent and high quality women-centered care; (2) they valued their profession but saw it as complex and challenging; (3) as health professionals, they reported a variety of organizational, cultural, and professional barriers to providing women-centered care. Conclusions: While performing a specific task in the task shifting context, midwives perceived their crucial roles and responsibilities, along with achieved value and reward. However, due to a range of existing barriers, the caring task posed great challenges in completely implementing women-centered care. It is essential for systems to identify and eliminate these barriers early, to consider midwives' emotional well-being, and to develop overall strategies to better support the midwifery workforce. Policy makers and administrators should establish a supportive environment to facilitate midwives to perform women-centered caring tasks in more effective and efficient ways.
5.Comprehensive analysis of unplanned abdominal ? pelvic reoperations in Peking University Cancer Hospital and Institute from 2008 to 2018
Dan WANG ; Zhouqiao WU ; Wei WANG ; Xiaoyi WANG ; Jing LIU ; Chunyi HAO ; Ziyu LI ; Dong XUE ; Lin SHEN ; Jiafu JI
Chinese Journal of Gastrointestinal Surgery 2019;22(9):869-875
Objective To summarize the characteristics of abdominal?pelvic unplanned reoperation (URO) in a cancer hospital. Methods Retrospectively descriptive cohort research was adopted. The classification of diseases was based on ICD?10, and surgical classification was based on ICD?9?CM?3. Medical record summary database from 2008 to 2018 in Beijing Cancer Hospital was collected, and all URO information of abdominal?pelvic surgery was retrieve. The time of URO, disease type, surgery type and cause were statistically analyzed. Distribution of main disease incidence and constituent ratio, and the application of major surgery and surgery type composition ratio were analyzed as well. Results From 2008 to 2018, a total of 46854 cases underwent abdominal?pelvic surgery (including gastrointestinal, hepatic?biliary?pancreatic, gynecological, urological, or esophageal cancer surgery) and 713 patients received URO (1.52%), including 486 males and 227 females (2.14: 1.00) with a mean age of (58.1 ± 12.2) years. A total of 246 patients (34.50%) had comorbidity, and with comorbidity: without comorbidity was 1.13: 1.00. The hospital stay was (44.5 ± 43.0) days, and the total cost was (178000 ± 112000) yuan. There were 22 deaths (3.09%). The median interval between URO and the first operation was 8 (0 to 131) days. The highest rate of URO was 2.45% (89/3629) in 2012, while the lowest was 0.95% (53/5596) in 2015. The top 3 major cancer types of URO included colorectal cancer (222 cases, 31.14%), gastric cancer (166 cases, 23.28%) and esophageal cancer (45 cases, 6.31%). The cancer types with the highest URO rate included pancreatic cancer (3.97%, 30/756), gastric cancer (1.81%, 166/9171) and colorectal cancer (1.80%, 222/12333). The top 3 surgical procedures resulting in URO were rectal resection (109 cases, 15.29%), total gastrectomy (79 cases, 11.08%), and total pancreatectomy (64 cases, 8.98%). Focusing on 497 URO cases from 2012 to 2018, 465 cases (93.56%) followed relatively difficult grade III and IV surgery, while only 32 cases (6.44%) followed grade I and II surgery. The top 5 main causes of URO were bleeding (225 cases, 31.56%), anastomotic leak (225 cases, 31.56%), infection (89 cases, 12.48%), intestinal obstruction (53 cases, 7.43%), and wound dehiscence (35 cases, 4.91%), adding up to a total of 87.94% of all URO. Conclusion This study summarizes the epidemiology of abdominal?pelvic URO in our cancer institution, providing the solid baseline for future investigation of URO and the subsequent formulation of corresponding prevention and intervention measures.
6.Comprehensive analysis of unplanned abdominal ? pelvic reoperations in Peking University Cancer Hospital and Institute from 2008 to 2018
Dan WANG ; Zhouqiao WU ; Wei WANG ; Xiaoyi WANG ; Jing LIU ; Chunyi HAO ; Ziyu LI ; Dong XUE ; Lin SHEN ; Jiafu JI
Chinese Journal of Gastrointestinal Surgery 2019;22(9):869-875
Objective To summarize the characteristics of abdominal?pelvic unplanned reoperation (URO) in a cancer hospital. Methods Retrospectively descriptive cohort research was adopted. The classification of diseases was based on ICD?10, and surgical classification was based on ICD?9?CM?3. Medical record summary database from 2008 to 2018 in Beijing Cancer Hospital was collected, and all URO information of abdominal?pelvic surgery was retrieve. The time of URO, disease type, surgery type and cause were statistically analyzed. Distribution of main disease incidence and constituent ratio, and the application of major surgery and surgery type composition ratio were analyzed as well. Results From 2008 to 2018, a total of 46854 cases underwent abdominal?pelvic surgery (including gastrointestinal, hepatic?biliary?pancreatic, gynecological, urological, or esophageal cancer surgery) and 713 patients received URO (1.52%), including 486 males and 227 females (2.14: 1.00) with a mean age of (58.1 ± 12.2) years. A total of 246 patients (34.50%) had comorbidity, and with comorbidity: without comorbidity was 1.13: 1.00. The hospital stay was (44.5 ± 43.0) days, and the total cost was (178000 ± 112000) yuan. There were 22 deaths (3.09%). The median interval between URO and the first operation was 8 (0 to 131) days. The highest rate of URO was 2.45% (89/3629) in 2012, while the lowest was 0.95% (53/5596) in 2015. The top 3 major cancer types of URO included colorectal cancer (222 cases, 31.14%), gastric cancer (166 cases, 23.28%) and esophageal cancer (45 cases, 6.31%). The cancer types with the highest URO rate included pancreatic cancer (3.97%, 30/756), gastric cancer (1.81%, 166/9171) and colorectal cancer (1.80%, 222/12333). The top 3 surgical procedures resulting in URO were rectal resection (109 cases, 15.29%), total gastrectomy (79 cases, 11.08%), and total pancreatectomy (64 cases, 8.98%). Focusing on 497 URO cases from 2012 to 2018, 465 cases (93.56%) followed relatively difficult grade III and IV surgery, while only 32 cases (6.44%) followed grade I and II surgery. The top 5 main causes of URO were bleeding (225 cases, 31.56%), anastomotic leak (225 cases, 31.56%), infection (89 cases, 12.48%), intestinal obstruction (53 cases, 7.43%), and wound dehiscence (35 cases, 4.91%), adding up to a total of 87.94% of all URO. Conclusion This study summarizes the epidemiology of abdominal?pelvic URO in our cancer institution, providing the solid baseline for future investigation of URO and the subsequent formulation of corresponding prevention and intervention measures.
7. Comprehensive analysis of unplanned abdominal - pelvic reoperations in Peking University Cancer Hospital and Institute from 2008 to 2018
Dan WANG ; Zhouqiao WU ; Wei WANG ; Xiaoyi WANG ; Jing LIU ; Chunyi HAO ; Ziyu LI ; Dong XUE ; Lin SHEN ; Jiafu JI
Chinese Journal of Gastrointestinal Surgery 2019;22(9):869-875
Objective:
To summarize the characteristics of abdominal-pelvic unplanned reoperation (URO) in a cancer hospital.
Methods:
Retrospectively descriptive cohort research was adopted. The classification of diseases was based on ICD-10, and surgical classification was based on ICD-9-CM-3. Medical record summary database from 2008 to 2018 in Beijing Cancer Hospital was collected, and all URO information of abdominal-pelvic surgery was retrieve. The time of URO, disease type, surgery type and cause were statistically analyzed. Distribution of main disease incidence and constituent ratio, and the application of major surgery and surgery type composition ratio were analyzed as well.
Results:
From 2008 to 2018, a total of 46854 cases underwent abdominal-pelvic surgery (including gastrointestinal, hepatic-biliary-pancreatic, gynecological, urological, or esophageal cancer surgery) and 713 patients received URO (1.52%), including 486 males and 227 females (2.14:1.00) with a mean age of (58.1±12.2) years. A total of 246 patients (34.50%) had comorbidity, and with comorbidity: without comorbidity was 1.13:1.00. The hospital stay was (44.5±43.0) days, and the total cost was (178000±112000) yuan. There were 22 deaths (3.09%). The median interval between URO and the first operation was 8 (0 to 131) days. The highest rate of URO was 2.45% (89/3629) in 2012, while the lowest was 0.95% (53/5596) in 2015. The top 3 major cancer types of URO included colorectal cancer (222 cases, 31.14%), gastric cancer (166 cases, 23.28%) and esophageal cancer (45 cases, 6.31%). The cancer types with the highest URO rate included pancreatic cancer (3.97%, 30/756), gastric cancer (1.81%, 166/9171) and colorectal cancer (1.80%, 222/12333). The top 3 surgical procedures resulting in URO were rectal resection (109 cases, 15.29%), total gastrectomy (79 cases, 11.08%), and total pancreatectomy (64 cases, 8.98%). Focusing on 497 URO cases from 2012 to 2018, 465 cases (93.56%) followed relatively difficult grade III and IV surgery, while only 32 cases (6.44%) followed grade I and II surgery. The top 5 main causes of URO were bleeding (225 cases, 31.56%), anastomotic leak (225 cases, 31.56%), infection (89 cases, 12.48%), intestinal obstruction (53 cases, 7.43%), and wound dehiscence (35 cases, 4.91%), adding up to a total of 87.94% of all URO.
Conclusion
This study summarizes the epidemiology of abdominal - pelvic URO in our cancer institution, providing the solid baseline for future investigation of URO and the subsequent formulation of corresponding prevention and intervention measures.