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Luo D, Shi CY, Wei NS, Yang BY, Qin K, Liu G, Dong BQ, Qin YX, Qin XL, Chen SY, Guo XJ, Gan L, Xu RL, Li H, Li J. The potential mechanism of the progression from latent to active tuberculosis based on the intestinal microbiota alterations. Tuberculosis (Edinb) 2023; 143:102413. [PMID: 37832478 DOI: 10.1016/j.tube.2023.102413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 09/10/2023] [Accepted: 09/26/2023] [Indexed: 10/15/2023]
Abstract
INTRODUCTION Tuberculosis (TB) poses a serious challenge to global health systems. The altered intestinal microbiota is associated with the pathogenesis of TB, but the exact links remain unclear. METHODS 16 S rDNA sequencing was performed to comprehensively detect the changes in the intestinal microbiota of feces from active TB (ATB), latent TB infection (LTBI) and healthy controls (HC). RESULTS The rarefaction curves demonstrated the sequencing results' validity. The alpha diversity was lowest in ATB, while highest in HC. Boxplot of beta diversity showed significant differences in every two groups. LDA Effect Size (LEfSe) Analysis revealed differences in probiotic bacteria like Romboutsia, Bifidobacterium and Lactobacillus in LTBI, and pro-inflammatory bacteria like R. gnavus, Streptococcus and Erysipelatoclostridium in ATB, corresponding to the cluster analysis. PICRUST2 analysis revealed the pentose phosphate pathway was active in ATB and LTBI (more active in ATB). The differences between the groups are statistically significant at the P<0.05 level. CONCLUSION Our study indicated that from LTBI to ATB, some intestinal microbiota inhibit the synthesis of interferon (INF)-γ and interleukin (IL)-17, promoting the survival and spread of Mycobacterium tuberculosis (M. tb). In addition, the metabolites secreted by intestinal microbiota and dysbiosis in intestine also have an effect on the development of LTBI to ATB.
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Affiliation(s)
- Dan Luo
- Department of Biostatistics, School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning, China; Guangxi Key Laboratory of Translational Medicine for Treating High-Incidence Infectious Diseases with Integrative Medicine, Nanning, China
| | - Chong-Yu Shi
- The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Nian-Sa Wei
- The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Bo-Yi Yang
- The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Kai Qin
- The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Gang Liu
- Department of Biostatistics, School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning, China
| | - Bai-Qing Dong
- Department of Biostatistics, School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning, China
| | - Yi-Xiang Qin
- Department of Biostatistics, School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning, China
| | - Xiao-Ling Qin
- Department of Biostatistics, School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning, China
| | - Shi-Yi Chen
- Department of Biostatistics, School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning, China
| | - Xiao-Jing Guo
- Department of Biostatistics, School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning, China
| | - Li Gan
- Department of Biostatistics, School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning, China
| | - Ruo-Lan Xu
- Department of Biostatistics, School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning, China
| | - Hai Li
- Department of Biostatistics, School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning, China.
| | - Jing Li
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, China.
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Luo D, Yang BY, Qin K, Shi CY, Wei NS, Li H, Qin YX, Liu G, Qin XL, Chen SY, Guo XJ, Gan L, Xu RL, Dong BQ, Li J. Untargeted Metabolomics of Feces Reveals Diagnostic and Prognostic Biomarkers for Active Tuberculosis and Latent Tuberculosis Infection: Potential Application for Precise and Non-Invasive Identification. Infect Drug Resist 2023; 16:6121-6138. [PMID: 37719654 PMCID: PMC10505020 DOI: 10.2147/idr.s422363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 08/31/2023] [Indexed: 09/19/2023] Open
Abstract
Purpose Distinguishing latent tuberculosis infection (LTBI) from active tuberculosis (ATB) is important to control the prevalence of tuberculosis; however, there is currently no effective method. The aim of this study was to discover specific metabolites through fecal untargeted metabolomics to discriminate ATB, individuals with LTBI, and healthy controls (HC) and to probe the metabolic perturbation associated with the progression of tuberculosis. Patients and Methods Liquid chromatography-tandem mass spectrometry (LC-MS/MS) was performed to comprehensively detect compounds in fecal samples from HC, LTBI, and ATB patients. Differential metabolites between the two groups were screened, and their underlying biological functions were explored. Candidate metabolites were selected and enrolled in LASSO regression analysis to construct diagnostic signatures for discriminating between HC, LTBI, and ATB. A receiver operating characteristic (ROC) curve was applied to evaluate diagnostic value. A nomogram was constructed to predict the risk of progression of LTBI. Results A total of 35 metabolites were found to exist differentially in HC, LTBI, and ATB, and eight biomarkers were selected. Three diagnostic signatures based on the eight biomarkers were constructed to distinguish between HC, LTBI, and ATB, demonstrating excellent discrimination performance in ROC analysis. A nomogram was successfully constructed to evaluate the risk of progression of LTBI to ATB. Moreover, 3,4-dimethylbenzoic acid has been shown to distinguish ATB patients with different responses to etiological tests. Conclusion This study constructed diagnostic signatures based on fecal metabolic biomarkers that effectively discriminated HC, LTBI, and ATB, and established a predictive model to evaluate the risk of progression of LTBI to ATB. The results provide scientific evidence for establishing an accurate, sensitive, and noninvasive differential diagnosis scheme for tuberculosis.
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Affiliation(s)
- Dan Luo
- Department of Biostatistics, School of Public Health and Management of Guangxi University of Chinese Medicine, Nanning, Guangxi, People’s Republic of China
- Guangxi Key Laboratory of Translational Medicine for Treating High-Incidence Infectious Diseases with Integrative Medicine, Guangxi University of Chinese Medicine, Nanning, Guangxi, People’s Republic of China
| | - Bo-Yi Yang
- The First Affiliated Hospital, Guangxi Medical University, Nanning, Guangxi, People’s Republic of China
| | - Kai Qin
- The Second Affiliated Hospital, Guangxi Medical University, Nanning, Guangxi, People’s Republic of China
| | - Chong-Yu Shi
- The First Affiliated Hospital, Guangxi Medical University, Nanning, Guangxi, People’s Republic of China
| | - Nian-Sa Wei
- The Second Affiliated Hospital, Guangxi Medical University, Nanning, Guangxi, People’s Republic of China
| | - Hai Li
- Department of Biostatistics, School of Public Health and Management of Guangxi University of Chinese Medicine, Nanning, Guangxi, People’s Republic of China
| | - Yi-Xiang Qin
- Department of Biostatistics, School of Public Health and Management of Guangxi University of Chinese Medicine, Nanning, Guangxi, People’s Republic of China
| | - Gang Liu
- Department of Biostatistics, School of Public Health and Management of Guangxi University of Chinese Medicine, Nanning, Guangxi, People’s Republic of China
| | - Xiao-Ling Qin
- Department of Biostatistics, School of Public Health and Management of Guangxi University of Chinese Medicine, Nanning, Guangxi, People’s Republic of China
| | - Shi-Yi Chen
- Department of Biostatistics, School of Public Health and Management of Guangxi University of Chinese Medicine, Nanning, Guangxi, People’s Republic of China
| | - Xiao-Jing Guo
- Department of Biostatistics, School of Public Health and Management of Guangxi University of Chinese Medicine, Nanning, Guangxi, People’s Republic of China
| | - Li Gan
- Department of Biostatistics, School of Public Health and Management of Guangxi University of Chinese Medicine, Nanning, Guangxi, People’s Republic of China
| | - Ruo-Lan Xu
- Department of Biostatistics, School of Public Health and Management of Guangxi University of Chinese Medicine, Nanning, Guangxi, People’s Republic of China
| | - Bai-Qing Dong
- Department of Biostatistics, School of Public Health and Management of Guangxi University of Chinese Medicine, Nanning, Guangxi, People’s Republic of China
| | - Jing Li
- Deparment of Physiology, School of Basic Medical Sciences of Guangxi Medical University, Nanning, Guangxi, People’s Republic of China
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Tu SJ, Wei YJ, Chen BT, Zhang XF, Luo C, Dong BQ. Effects of a false-positive result in newborn congenital hypothyroidism screening on parents in Guangxi, China. Front Pediatr 2023; 11:1134923. [PMID: 37252042 PMCID: PMC10213940 DOI: 10.3389/fped.2023.1134923] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 04/24/2023] [Indexed: 05/31/2023] Open
Abstract
Background As more than 500,000 neonates participate in newborn congenital hypothyroidism (CH) screening in Guangxi Zhuang Autonomous Region each year, the overall number of false-positive (FP) cases has increased. We aim to assess the parental stress in parents of neonates with FP CH results in Guangxi, find out the influence factors related to demographics, and provide the basis for personalized health education. Methods The parents of neonates with FP CH results were invited to participate in the FP group, and the parents of neonates with all negative results were invited to participate in the control group. The parents completed a questionnaire on demographics, knowledge of CH, and the parental stress index (PSI) in the hospital for the first time. The follow-up visits for PSI were conducted 3, 6, and 12 months afterward through telephone and online. Results A total of 258 and 1,040 parents participated in the FP and control groups, respectively. The parents in the FP group had better knowledge of CH and higher PSI scores than the parents in the control group. The result of logistic regression showed that the major influence factors related to the knowledge of CH were FP experience and source of knowledge. The parents in the FP group who were well-informed during the recall phone call had lower PSI scores than the other parents. The parents in the FP group showed decreasing PSI scores gradually in follow-up visits. Conclusion The results suggested that FP screening results may affect parental stress and parent-child relationship. FP results increased the stress on the parents and increased their knowledge of CH passively.
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Affiliation(s)
- Si-Jing Tu
- School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning, China
- School of Public Health, Hangzhou Normal University, Hangzhou, China
| | - Yu-Jia Wei
- School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning, China
| | - Bu-Tong Chen
- School of Humanities and Social Sciences, Guangxi Medical University, Nanning, China
| | - Xiao-Fei Zhang
- Department of Pediatrics, The Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Chao Luo
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Bai-Qing Dong
- School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning, China
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Li JL, Su YJ, Dong BQ, Wu QJ, Yang QL, Chen QY, Chen SY, Tan C, Ju Y, Li H. [Association of DNA methylation of IFNG gene with no/low response to hepatitis B vaccine in children]. Zhonghua Yu Fang Yi Xue Za Zhi 2022; 56:926-931. [PMID: 35899344 DOI: 10.3760/cma.j.cn112150-20220125-00087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To explore the association of DNA methylation with immune response to hepatitis B (HepB) vaccine in Han nationality children from Guangxi province. Methods: A total of 263 children aged 8-9 months who had completed HepB immunization program were recruited from three hospitals in Guangxi province by using unmatched case-control method. Children with the HepB surface antibody concentration(Anti-HBs)<100 mIU/ml was set as the case group and ≥100 mIU/ml as the control group. Multiplex PCR and heavy sulfite sequencing were used to treat the samples. Illumina platform was used for high-throughput DNA methylation sequencing of IFNG gene target regions and CpG sites. Unconditional logistic regression was used to analyze the association between cytosine-phospho-guanosine DNA methylation at 18 loci of IFNG gene and HepB immune response level. Results: There were 104 children in the case group and 159 in the control group. The median (Q1, Q3) level of anti-HBs in two groups were 62.34 (30.06, 98.88) mIU/ml and 1 089.10 (710.35, 1 233.45) mIU/ml. The methylation levels of IFNG_1 gene 44 and 93 locus in the case group were higher than those in the control group (P<0.05). The unconditional logistic regression model showed that the DNA methylation level of IFNG_1 gene at 44 (OR=1.18, 95%CI: 1.03-1.35) and 93 (OR=1.21, 95%CI: 1.07-1.38) locus was associated with the HepB response level. Conclusion: The changes of DNA methylation at locus 44 and 93 of IFNG_1 gene may be relevant factors affecting the response level of HepB in Han nationality children from Guangxi province.
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Affiliation(s)
- J L Li
- Department of epidemiology, School of Public Health and Management, Guangxi University of Traditional Chinese Medicine, Nanning 530200, China Guangxi Key Laboratory of Translational Medicine for Treating High-incidence Infectious Diseases with Integrative Medicine, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - Y J Su
- Department of epidemiology, School of Public Health and Management, Guangxi University of Traditional Chinese Medicine, Nanning 530200, China Guangxi Key Laboratory of Translational Medicine for Treating High-incidence Infectious Diseases with Integrative Medicine, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - B Q Dong
- Department of epidemiology, School of Public Health and Management, Guangxi University of Traditional Chinese Medicine, Nanning 530200, China
| | - Q J Wu
- Department of epidemiology, School of Public Health and Management, Guangxi University of Traditional Chinese Medicine, Nanning 530200, China
| | - Q L Yang
- Guangxi Key Laboratory of Translational Medicine for Treating High-incidence Infectious Diseases with Integrative Medicine, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - Q Y Chen
- Guangxi Key Laboratory for Control and Prevention of Viral Hepatitis, Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention, Nanning 530028, China
| | - S Y Chen
- Department of epidemiology, School of Public Health and Management, Guangxi University of Traditional Chinese Medicine, Nanning 530200, China
| | - C Tan
- Department of Epidemiology and Health Statistics, School of Public Health, Guilin Medical College, Guilin 541000, China
| | - Y Ju
- Department of Emergent Infectious Disease Control and Prevention, Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention, Nanning 530028, China
| | - H Li
- Department of epidemiology, School of Public Health and Management, Guangxi University of Traditional Chinese Medicine, Nanning 530200, China Guangxi Key Laboratory of Translational Medicine for Treating High-incidence Infectious Diseases with Integrative Medicine, Guangxi University of Chinese Medicine, Nanning 530200, China
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Dong BQ, Chen BY, Liang QY, He S, Lyu W, Liu BT, Zuo YJ, Lin L, Wei H, Wei J, Hang XN, Qiu XX. [Study on the characteristics of major birth defects in 1.69 million cases of fetus in Guangxi Zhuang Autonomous Region]. Zhonghua Liu Xing Bing Xue Za Zhi 2020; 40:1554-1559. [PMID: 32062914 DOI: 10.3760/cma.j.issn.0254-6450.2019.12.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: Tracking the information on 1.69 million fetal cases across Guangxi Zhuang Autonomous Region (Guangxi) so as to study the occurrences of total and major birth defects in order to evaluate the ability on related prevention and control programs in Guangxi. Methods: Using the self-developed "Gui Women's System" to establish a database of 1.69 million fetal cases in Guangxi and to analyze the distribution of time, space and population, as well as the outcomes of pregnancy, using the big data. Results: During the 29 months of observation, the overall live birth rate was 99.25%, with stillbirth rate during pregnancy as 0.44%, stillbirth rate during birth as 0.02%, and the 0-6 days mortality rate as 0.14%. The total detection rate on birth defects was 197.63/10 000; the incidence rate was 103.04/10 000, the birth rate was 102.55/10 000. The overall discovery rate of major birth defects was 48.33/10 000, with the incidence rate as 783 000, the birth rate as 0.58/10 000. The discovery rates of major birth defects in 14 cities were between 35 and 68/10 000, and the birth rate dropped significantly to less than 1.00 in 10 000. Nationalities showed that the number of pregnant women with birth defects more than 50 000 would include Hui (9.68/10 000), Yao (9.57/10 000), and Jing (9.37/10 000). With the increasing age of gestation, number of birth defects, incidence of major birth defects also increased. Ninety-five percent of the major birth defects were found within <28 weeks and with the top 5 kinds of major birth defects as complicated congenital heart disease (9.11/10 000), alpha thalassemia (8.36/10 000), and 21-trisomy syndrome (7.85/10 000), beta thalassemia (5.32/10 000) and fetal edema syndrome (4.92/10 000). The top 5 major birth defects appeared as complicated congenital heart disease (9.11/10 000), alpha thalassemia (8.36/10 000), and 21-trisomy syndrome (7.85/10 000), beta thalassemia (5.32/10 000) and fetal edema syndrome (4.92/10 000). Conclusion: Programs leading to increase the rate on discovery of major birth defects were fundamental in effectively reducing the major birth defects.
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Affiliation(s)
- B Q Dong
- School of Public Health Management, Guangxi University of Traditional Chinese Medicine, Nanning 530200, China
| | - B Y Chen
- Guangxi Zhuang Autonomous Region Women and Children Care Hospital, Nanning 530000, China
| | - Q Y Liang
- Guangxi Zhuang Autonomous Region Health and Family Planning Statistics Information Center, Nanning 530021, China
| | - S He
- Guangxi Zhuang Autonomous Region Women and Children Care Hospital, Nanning 530000, China
| | - W Lyu
- Guangxi Zhuang Autonomous Region Health and Family Planning Statistics Information Center, Nanning 530021, China
| | - B T Liu
- Guangxi Zhuang Autonomous Region Health and Family Planning Statistics Information Center, Nanning 530021, China
| | - Y J Zuo
- Guangxi Zhuang Autonomous Region Women and Children Care Hospital, Nanning 530000, China
| | - L Lin
- Guangxi Zhuang Autonomous Region Women and Children Care Hospital, Nanning 530000, China
| | - H Wei
- Guangxi Zhuang Autonomous Region Women and Children Care Hospital, Nanning 530000, China
| | - J Wei
- Guangxi Zhuang Autonomous Region Women and Children Care Hospital, Nanning 530000, China
| | - X N Hang
- Guangxi Zhuang Autonomous Region Women and Children Care Hospital, Nanning 530000, China
| | - X X Qiu
- Guangxi Zhuang Autonomous Region Women and Children Care Hospital, Nanning 530000, China
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Dong BQ, You JP, Liang QY, Lyu W, Ma JF, Wei HW, Li H. [Study on the distribution and related factors of birth weight of live births in Guangxi Zhuang Autonomous Region of China from 2016 to 2018]. Zhonghua Yu Fang Yi Xue Za Zhi 2019; 53:1259-1264. [PMID: 31795583 DOI: 10.3760/cma.j.issn.0253-9624.2019.12.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the distribution and related factors of birth weight of live births and full-term infants in Guangxi Zhuang Autonomous Region of China. Methods: Based on Guangxi women and children information system from 2016 to 2018, a large real-time database about maternal and live-birth information was established. It covered 1 712 midwifery institutions in Guangxi. A total of 2 394 240 cases of live births were collected and 2 243 129 cases of which were full-term infants. The multivariate logistic regression model was used to analyze the related factors of low birth weight. Results: The birth weight of 2 394 240 live births, (3 123.49±461.08) g, in Guangxi was approximately normal distribution with a peak distribution to the left. The incidence of low birth weight was 8.05%, and the incidence of macrosomia was 2.07%. The incidence of low birth weight was 10.92% for the puerpera with body mass index (BMI, kg/m(2)) <18.5, 16.82% for the puerpera with height <145 cm, 8.92% for the puerpera with age <20 years old, 7.67% for the puerpera with age ≥35 years old, and 54.65% for the puerpera with premature birth. The birth weight of 2 243 129 full-term infants, (3 176.01±400.78) g, was approximately normal distribution with a peak distribution to the right. The incidence of low birth weight was 2.97%, and the incidence of macrosomia was 2.19%. The incidence of low birth weight was 4.73% for puerpera with BMI<18.5, 8.17% for puerpera with height<145 cm, 4.83% for puerpera with age <20 years old, and 3.05% for puerpera with age ≥35 years old. The risks of low birth weight [OR (95%CI) value] of pregnant women aged <20, 25-29 and 30-34 years old were 1.31 (1.28-1.35), 0.88 (0.86-0.90) and 0.89 (0.87-0.91) times of those aged ≥35 years old. The risks of low birth weight [OR (95%CI) value] of pregnancy BMI <18.5 and 18.5-23.9 kg/m(2) group were 1.98 (1.94-2.03) and 1.20 (1.18-1.23) times of those pregnancy BMI ≥24 kg/m(2). The risks of low birth weight [OR (95%CI) value] of pregnant women's height (cm)<145, 145-154, 155-159 and 160-164 cm were 4.67 (4.39-4.97), 2.36 (2.29-2.44), 1.58 (1.53-1.63) and 1.22 (1.18-1.26) times of those heights ≥165 cm group. The risks of low birth weight [OR (95%CI) value] of pregnant women's gestational age <28, 28-31 and 32-36 years old were 136.65 (124.33-150.20), 1 704.37 (1 509.02-1 925.02) and 33.45 (32.98-33.94) times of those gestational age ≥37 years old. Conclusion: The incidence of low birth weight of live births was higher in Guangxi from 2016 to 2018. There is a higher risk of low birth weight for younger, older, low height, low BMI and preterm women in Guangxi from 2016 to 2018.
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Affiliation(s)
- B Q Dong
- School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - J P You
- School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - Q Y Liang
- Departments of Statistics, Guangxi Health and Family Planning Statistical Information Center, Nanning 530021, China
| | - W Lyu
- Departments of Statistics, Guangxi Health and Family Planning Statistical Information Center, Nanning 530021, China
| | - J F Ma
- School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - H W Wei
- Departments of Obstetrics, Guangxi Maternal and Child Health Hospital, Nanning 530000, China
| | - H Li
- School of Public Health and Management, Guangxi University of Chinese Medicine, Nanning 530200, China
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Dong BQ, Zhan TR, Liu XH, Jiang LP, Liu F, Hu XH, Zi J. Optical response of a disordered bicontinuous macroporous structure in the longhorn beetle Sphingnotus mirabilis. Phys Rev E Stat Nonlin Soft Matter Phys 2011; 84:011915. [PMID: 21867221 DOI: 10.1103/physreve.84.011915] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2011] [Indexed: 05/31/2023]
Abstract
We studied the structural and optical properties of scales in the longhorn beetle Sphingnotus mirabilis. Structural characterizations revealed that the scale interior possesses a disordered bicontinuous macroporous structure, resembling a phase-separated structure obtained by spinodal decomposition. Its optical response was investigated both experimentally and theoretically. Our results show that this structure has interesting optical properties due to the existence of only short-range order and the lack of well-defined local structures.
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Affiliation(s)
- B Q Dong
- Department of Physics, Key Laboratory of Micro and Nano Photonic Structures Ministry of Education, Fudan University, Shanghai 200433, People's Republic of China
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Dong BQ, Yang J, Wang XY, Gong J, von Seidlein L, Wang ML, Lin M, Liao HZ, Ochiai RL, Xu ZY, Jodar L, Clemens JD. Trends and disease burden of enteric fever in Guangxi province, China, 1994-2004. Bull World Health Organ 2010; 88:689-96. [PMID: 20865074 PMCID: PMC2930361 DOI: 10.2471/blt.09.069310] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2009] [Revised: 02/13/2010] [Accepted: 02/15/2010] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVE To determine the burden of enteric fever through trends in morbidity and mortality, bacterial species and antimicrobial resistance in Guangxi, a southern, subtropical, coastal province of China with a disproportionally large burden of enteric fever. METHODS Data on morbidity and mortality caused by enteric fever between 1994 and 2004 were extracted from the Guangxi Center for Disease Control and Prevention. Laboratory-based surveillance and outbreak investigations were integrated with reports of notifiable infectious diseases to estimate the bacterial species-specific incidence of enteric fever. To adjust for underreporting, survey data were collected from three prefectures that represent the hyper-, moderate- and low-endemic regions of Guangxi province. FINDINGS In Guangxi province, enteric fever incidence rate varied over the study period, with a peak of 13.5 cases per 100 000 population in 1995 and a low of 6.5 in 2003. The disease occurred most frequently during the summer and autumn months and in the group aged 10-49 years. The incidence of enteric fever varied by region within Guangxi province. During the 11-year period covered by the study, 61 outbreaks of enteric fever were reported, and Salmonella paratyphi A (SPA) became the predominant causative agent in the province. CONCLUSION Prospective studies may provide a better understanding of the reason for the shifting epidemiology of enteric fever in Guangxi province. Given the emergence of resistance to first- and second-line antimicrobials for the treatment of enteric fever, a bivalent vaccine against both SPA and S. typhi would facilitate for disease control.
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Affiliation(s)
- Bai-Qing Dong
- Guangxi Center for Disease Control and Prevention, Nanning, Guangxi, China
| | - Jin Yang
- Guangxi Center for Disease Control and Prevention, Nanning, Guangxi, China
| | - Xuan-Yi Wang
- Institutes of Biomedical Sciences, Fudan University, 138 Yi Xue Yuan Road, Shanghai, 200032, China
| | - Jian Gong
- Guangxi Center for Disease Control and Prevention, Nanning, Guangxi, China
| | | | - Ming-Liu Wang
- Guangxi Center for Disease Control and Prevention, Nanning, Guangxi, China
| | - Mei Lin
- Guangxi Center for Disease Control and Prevention, Nanning, Guangxi, China
| | - He-Zhuang Liao
- Guangxi Center for Disease Control and Prevention, Nanning, Guangxi, China
| | - R Leon Ochiai
- International Vaccine Institute, Seoul, Republic of Korea
| | - Zhi-Yi Xu
- International Vaccine Institute, Seoul, Republic of Korea
| | - Luis Jodar
- International Vaccine Institute, Seoul, Republic of Korea
| | - John D Clemens
- International Vaccine Institute, Seoul, Republic of Korea
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Dong BQ, Liu XH, Zhan TR, Jiang LP, Yin HW, Liu F, Zi J. Structural coloration and photonic pseudogap in natural random close-packing photonic structures. Opt Express 2010; 18:14430-14438. [PMID: 20639928 DOI: 10.1364/oe.18.014430] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Scales on the elytra of longhorn beetle Anoplophora graafi display diverse non-iridescent colors ranging from blue, green, yellow, and red to purple. By structural characterizations, optical measurements, and theoretical calculations, we found that the scale colors stem from an amorphous photonic structure possessing only short-range order: random close-packing of chitin nanoparticles. Our results showed that direction-independent photonic pseudogaps found in the photon density of states of the random close-packing photonic structure are the ultimate physical origin for non-iridescent coloration of scales. The color steering strategy of scales is ingenious, simply by varying the size of chitin nanoparticles. Revealed natural random close-packing photonic structures and the color steering strategy of scales could render valuable inspiration for the artificial fabrication and design of photonic structures and devices as well.
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Affiliation(s)
- B Q Dong
- Department of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China
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Abstract
The elytra of longhorn beetles Tmesisternus isabellae show iridescent golden coloration which stems from long and flat scales imbricated densely on the elytral surface. The scales are able to change coloration from golden in the dry state to red in the wet state with water absorption. Structural characterizations revealed that the iridescent coloration of scales originates from a multilayer in the scale interior. Measurements on both water contact angle and chemical composition indicated that scales are hydrophilic. The change in scale coloration to red in the wet state is due to both the swelling of the multilayer period and water infiltration. The unraveled structural color change and its strategy may not only help us get insight into the biological functionality of structural coloration but also inspire the designs of artificial photonic devices.
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Affiliation(s)
- F Liu
- Department of Physics and Surface Physics Laboratory, Fudan University, Shanghai 200433, P. R. China
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Lin M, Dong BQ, Yang JY. [Epidemiological characteristics of meningococcal meningitis in Guangxi Zhuang Autonomous Region during 1996 and 2007]. Zhongguo Yi Miao He Mian Yi 2009; 15:58-60. [PMID: 20077678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
OBJECTIVE To analyze the epidemiological characteristics of meningococcal meningitis and provide evidences for disease control. METHOD The method of descriptive epidemiology has been used to analyze the data collected. RESULTS A total of 419 cases were reported with meningococcal meningitis between 1996-2007, annual incidence rate was 0.07/100,000. 68 cases were dead and mortatity was 16.23% . Highly sporadic distribution by areas was observed in the cases reported. And the incidence peak was between January and April. The aged was mainly at 0-9 years There was trace that the incidence move to aged at 10 19 years old in recent years. The in-cidence rate was higher in male than that in female. And it was mainly attacked in peasants, students and children left-behined at home. Outbreaks had occasionally occurred in Guangxi. The first outbreak caused by Neisseria meningitidis group C in China was reported. The strains isola-ted mainly were with Neisseria meningitidis group A, which accounting for 61.53% of the strains,followed by group C(15. 38%)and Group B (7.69%). Group A was found to be 100% re-sistant to SMZ-TMP,and both group C and B were 100% resistant to sulfanilamide. 1.28% the prevalence of carrier was confirmed by the throat swabs. The positive rate of titer to group A and C were 29. 95o and 21. 720 respectively, and the mean titers were 4.57 microg/ml and 1.70 microg/ml re-spectively. CONCLUSIONS The characteristics of Meningococcal meningitis are summarized as low incidence,high mortabity,highly sporadic distribution, grouping diversity and increasing incidence in older population. Comprehensive measures with the priority of vaccination is the key measure for meningococcal meningitis control.
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Affiliation(s)
- Mei Lin
- Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Nanning 530028, Guangxi, China
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Fang ZL, Sabin CA, Dong BQ, Wei SC, Chen QY, Fang KX, Yang JY, Huang J, Wang XY, Harrison TJ. Hepatitis B virus pre-S deletion mutations are a risk factor for hepatocellular carcinoma: a matched nested case-control study. J Gen Virol 2009; 89:2882-2890. [PMID: 18931087 PMCID: PMC2886956 DOI: 10.1099/vir.0.2008/002824-0] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
A matched nested case-control study of 33 paired cases and controls was conducted, based on a study cohort in Long An county, Guangxi, China, to determine whether infection with hepatitis B virus (HBV) with pre-S deletions is independently associated with the development of hepatocellular carcinoma (HCC), without the confounding effects of basal core promoter (BCP) double mutations. The prevalence of pre-S deletions was significantly higher in HCC (45.5 %, 15 of 33) than the controls (18.2 %, 6 of 33) (P<0.01), under the control of the influence of BCP double mutations. Most of the pre-S deletions occurred in, or involved, the 5' half of the pre-S2 region and the difference between HCC (93.3 %, 14 of 15) and controls (66.7 %, four of six) was significant for this region (P=0.015). There was no significant difference in pre-S deletions between the BCP mutant group and BCP wild-type group (P>0.05), nor was the prevalence of pre-S deletions significantly different between genotypes B and C (P>0.1). These results suggest that pre-S deletions constitute an independent risk factor for HCC and their emergence and effect are independent of BCP mutations. The 5' terminus of pre-S2 is the favoured site for the deletion mutations, especially in HCC cases. Further prospective studies are required to confirm the role of these mutations in the development of HCC.
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Affiliation(s)
- Zhong-Liao Fang
- Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Jin Zhou Road, Nanning, Guangxi 530028, PR China.,Department of Medicine, UCL Medical School, London W1T 4JF, UK
| | - Caroline A Sabin
- Research Department of Infection and Population Health, Division of Population Health, UCL Medical School, University College London, London NW3 2PF, UK
| | - Bai-Qing Dong
- Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Jin Zhou Road, Nanning, Guangxi 530028, PR China
| | - Shao-Chao Wei
- Sanitary and Antiepidemic Station of Long An, ChengXi Road, Cheng Xiang Town, Long An, Guangxi 532700, PR China
| | - Qin-Yan Chen
- Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Jin Zhou Road, Nanning, Guangxi 530028, PR China
| | - Kong-Xiong Fang
- Sanitary and Antiepidemic Station of Long An, ChengXi Road, Cheng Xiang Town, Long An, Guangxi 532700, PR China
| | - Jin-Ye Yang
- Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Jin Zhou Road, Nanning, Guangxi 530028, PR China
| | - Jian Huang
- Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Jin Zhou Road, Nanning, Guangxi 530028, PR China
| | - Xue-Yan Wang
- Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Jin Zhou Road, Nanning, Guangxi 530028, PR China
| | - Tim J Harrison
- Department of Medicine, UCL Medical School, London W1T 4JF, UK
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Fang ZL, Sabin CA, Dong BQ, Ge LY, Wei SC, Chen QY, Fang KX, Yang JY, Wang XY, Harrison TJ. HBV A1762T, G1764A mutations are a valuable biomarker for identifying a subset of male HBsAg carriers at extremely high risk of hepatocellular carcinoma: a prospective study. Am J Gastroenterol 2008; 103:2254-62. [PMID: 18844615 PMCID: PMC2566798 DOI: 10.1111/j.1572-0241.2008.01974.x] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVES Surveillance of hepatocellular carcinoma (HCC) can detect small tumors for resection but at a huge cost of health resources. The challenge is to reduce the surveillance population. We reported that 96% of HCC patients but only 24% of controls were infected with the hepatitis B virus (HBV) with A(1762)T, G(1764)A mutations in Guangxi, China. It is likely to be extremely beneficial in terms of cost and resources if a significant number of tumors can be detected early by screening this selected population. Our aim is to test this hypothesis. METHODS A cohort of 2,258 hepatitis B surface antigen-positive subjects aged 30-55 yr was recruited in Guangxi. Following evaluation of virological parameters at baseline, HCC is diagnosed by 6-monthly measurements of serum alpha-fetoprotein levels and ultrasonographic examinations. RESULTS Sixty-one cases of HCC were diagnosed after 36 months of follow-up. The HCC rate was higher in the mutant than wild-type group (P < 0.001, rate ratio [RR] 6.23, 95% confidence interval [CI] 2.83-13.68). The HCC rate in the male mutant group was higher than that in the male wild-type group (P < 0.001, RR 11.54, 95% CI 3.58-37.24). Specifically, 93.3% of male cases are infected with the mutant. Multivariate analyses showed that in men, increasing age and A(1762)T, G(1764)A double mutations are independently associated with developing HCC. CONCLUSIONS HBV A(1762)T, G(1764)A mutations constitute a valuable biomarker to identify a subset of male HBsAg carriers aged >30 yr at extremely high risk of HCC in Guangxi, and likely elsewhere.
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Affiliation(s)
- Zhong-Liao Fang
- Department of Medicine, Royal Free and University College Medical School, University College London, UK.,Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Tao Yuan Road, Nanning, Guangxi, P R China
| | - Caroline A Sabin
- Department of Primary Care and Population Sciences, Royal Free and University College Medical School, University College London, UK
| | - Bai-Qing Dong
- Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Tao Yuan Road, Nanning, Guangxi, P R China
| | - Lian-Ying Ge
- Cancer Institute of Guangxi, HeTi Rd, Nanning, Guangxi, P R China
| | - Shao-Chao Wei
- Sanitary and Antiepidemic Station of Long An, ChengXi Rd, Cheng Xiang Town, Long An, Guangxi, P R China
| | - Qin-Yan Chen
- Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Tao Yuan Road, Nanning, Guangxi, P R China
| | - Kong-Xiong Fang
- Sanitary and Antiepidemic Station of Long An, ChengXi Rd, Cheng Xiang Town, Long An, Guangxi, P R China
| | - Jin-Ye Yang
- Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Tao Yuan Road, Nanning, Guangxi, P R China
| | - Xue-Yan Wang
- Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Tao Yuan Road, Nanning, Guangxi, P R China
| | - Tim J Harrison
- Department of Medicine, Royal Free and University College Medical School, University College London, UK
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Gong J, Li CY, Dong BQ, Huang JZ, Quan Y, Lu WZ, Luo CH, Mao WC, Liao HZ, Fang JS, Cui XL, Xie GL, Wu XH, Lan RW. [Effectiveness of an immunization campaign with group A and C meningococcal polysaccharide vaccine in controlling an outbreak of group C meningococcal disease]. Zhonghua Liu Xing Bing Xue Za Zhi 2008; 29:552-555. [PMID: 19040035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
OBJECTIVE To assess the safety, immunogenicity and efficacy of group A and C meningococcal polysaccharide vaccine (A/C MPV) in response to an outbreak of group C meningococcal disease. METHODS A vaccination campaign with A/C MPV was prompted 6 weeks after the use of group A MPV in Laibin city, Guangxi, where an outbreak of group C meningococcal meningitis occurred in 2002. Vaccinees were observed for local and systemic reactions after the vaccination and followed up for the meningococcal disease for 5 years. Blood samples were collected from 71 people in the epidemic and 43 in the non-epidemic areas before and 1 month after the vaccination and examined by ELISA to detect IgG antibodies to group A and C polysaccharides. RESULTS The vaccination coverage was 97%. No significant adverse reactions were observed. The positive rates of group C antibodies after vaccination was between 97.67% and 100% among the populations in the epidemic and non-epidemic areas, as well as among those negative and positive for group C antibodies prior to the vaccination. The geometric mean anti-C concentrations ranged 30.81 microg/ml to 37.44 microg/ml, showing no significant difference between groups. The incidence rate of meningococcal disease in students with timely immunization (218.58/100,000) dropped by 69.02%, when compared to that in those with delayed immunization (705.72/100,000). No clinical cases were identified during the follow-up period of 15,760 person-years. CONCLUSION The vaccination campaign with the Chinese group A/C MPV seemed successful in controlling the group C meningococcal outbreak. The vaccine was shown to be safe even administered after the group A vaccine only 6 weeks apart. It could induce high levels of antibodies in vulnerable population and significantly increase antibody levels in seropositive individuals, thus providing a protection of at least 5 years.
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Affiliation(s)
- Jian Gong
- Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention, Nanning 530028, China
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Dong BQ, Liu W, Fan XH, Vijaykrishna D, Tang XC, Gao F, Li LF, Li GJ, Zhang JX, Yang LQ, Poon LLM, Zhang SY, Peiris JSM, Smith GJD, Chen H, Guan Y. Detection of a novel and highly divergent coronavirus from asian leopard cats and Chinese ferret badgers in Southern China. J Virol 2007; 81:6920-6. [PMID: 17459938 PMCID: PMC1933311 DOI: 10.1128/jvi.00299-07] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Since an outbreak of severe acute respiratory syndrome (SARS) was averted in 2004, many novel coronaviruses have been recognized from different species, including humans. Bats have provided the most diverse assemblages of coronaviruses, suggesting that they may be the natural reservoir. Continued virological surveillance has proven to be the best way to avert this infectious disease at the source. Here we provide the first description of a previously unidentified coronavirus lineage detected from wild Asian leopard cats (Prionailurus bengalensis) and Chinese ferret badgers (Melogale moschata) during virological surveillance in southern China. Partial genome analysis revealed a typical coronavirus genome but with a unique putative accessory gene organization. Phylogenetic analyses revealed that the envelope, membrane, and nucleoprotein structural proteins and the two conserved replicase domains, putative RNA-dependent RNA polymerase and RNA helicase, of these novel coronaviruses were most closely related to those of group 3 coronaviruses identified from birds, while the spike protein gene was most closely related to that of group 1 coronaviruses from mammals. However, these viruses always fell into an outgroup phylogenetic relationship with respect to other coronaviruses and had low amino acid similarity to all known coronavirus groups, indicating that they diverged early in the evolutionary history of coronaviruses. These results suggest that these viruses may represent a previously unrecognized evolutionary pathway, or possibly an unidentified coronavirus group. This study demonstrates the importance of systematic virological surveillance in market animals for understanding the evolution and emergence of viruses with infectious potential.
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Affiliation(s)
- B Q Dong
- State Key Laboratory of Emerging Infectious Diseases, Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 21 Sassoon Road, Pokfulam, Hong Kong SAR, China
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Kennedy WA, Chang SJ, Purdy K, LE T, Kilgore PE, Kim JS, Anh DD, Huong PLT, Dong BQ, Tan DM, Clemens JD, Ward JI. Incidence of bacterial meningitis in Asia using enhanced CSF testing: polymerase chain reaction, latex agglutination and culture. Epidemiol Infect 2007; 135:1217-26. [PMID: 17274856 PMCID: PMC2870670 DOI: 10.1017/s0950268806007734] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
To enhance the detection of bacterial meningitis in an East Asian surveillance study, we employed cerebrospinal fluid (CSF) bacterial culture, latex agglutination (LA) and polymerase chain reaction-enzyme immunoassay (PCR-EIA) testing for Haemophilus influenzae type b (Hib) and Streptococcus pneumoniae (Sp). The sensitivity and specificity of CSF PCR-EIA testing was compared to LA and culture. A meningitis case was defined by one positive result for any of the three tests. The sensitivity of H. influenzae CSF PCR-EIA, LA, and culture was 100%, 40% and 57.5% respectively; and for Sp CSF PCR-EIA, LA and culture, the sensitivity was 100%, 58.3% and 66.7%, respectively. Hib and Sp specificity was 100% by each method. CSF PCR-EIA was more sensitive than culture or LA for the detection of Hib and Sp meningitis cases increasing their incidence by 74% and 50% compared to culture respectively. CSF PCR-EIA should be included for the detection of bacterial meningitis in surveillance studies.
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Affiliation(s)
- W A Kennedy
- Department of Paediatrics, UCLA School of Medicine and the Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, USA.
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Tang XC, Zhang JX, Zhang SY, Wang P, Fan XH, Li LF, Li G, Dong BQ, Liu W, Cheung CL, Xu KM, Song WJ, Vijaykrishna D, Poon LLM, Peiris JSM, Smith GJD, Chen H, Guan Y. Prevalence and genetic diversity of coronaviruses in bats from China. J Virol 2006; 80:7481-90. [PMID: 16840328 PMCID: PMC1563713 DOI: 10.1128/jvi.00697-06] [Citation(s) in RCA: 259] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Coronaviruses can infect a variety of animals including poultry, livestock, and humans and are currently classified into three groups. The interspecies transmissions of coronaviruses between different hosts form a complex ecosystem of which little is known. The outbreak of severe acute respiratory syndrome (SARS) and the recent identification of new coronaviruses have highlighted the necessity for further investigation of coronavirus ecology, in particular the role of bats and other wild animals. In this study, we sampled bat populations in 15 provinces of China and reveal that approximately 6.5% of the bats, from diverse species distributed throughout the region, harbor coronaviruses. Full genomes of four coronavirues from bats were sequenced and analyzed. Phylogenetic analyses of the spike, envelope, membrane, and nucleoprotein structural proteins and the two conserved replicase domains, putative RNA-dependent RNA polymerase and RNA helicase, revealed that bat coronaviruses cluster in three different groups: group 1, another group that includes all SARS and SARS-like coronaviruses (putative group 4), and an independent bat coronavirus group (putative group 5). Further genetic analyses showed that different species of bats maintain coronaviruses from different groups and that a single bat species from different geographic locations supports similar coronaviruses. Thus, the findings of this study suggest that bats may play an integral role in the ecology and evolution of coronaviruses.
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Affiliation(s)
- X C Tang
- State Key Laboratory of Emerging Infectious Diseases, Department of Microbiology, The University of Hong Kong, Faculty of Medicine Building, 21 Sassoon Road, Pokfulam, Hong Kong SAR, China
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Yang WZ, Xing HX, Wang HZ, Lan YJ, Sun Q, Hu SX, Lü W, Yuan ZA, Chen YX, Dong BQ. [A study on early detection for seven infectious diseases]. Zhonghua Liu Xing Bing Xue Za Zhi 2004; 25:1039-41. [PMID: 15769359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
OBJECTIVE To provide methods and alert thresholds which are scientific, sensitive, specific and practical for Early Warning System in Public Health Surveillance. METHODS Alert data was based on historical infectious diseases reports. Control chart was used to detect outbreaks or epidemics. An epidemic was defined by consulting Specialists. After calculating sensitivity, specificity, positive predictive value and describing receiver-operating characteristic curve (ROC), the optimal model and thresholds were chosen. RESULTS At 80 percentile, the sensitivities and the specificities of epidemic haemorragia fever, hepatitis A, dysentery, epidemic cerebrospinal meningitis and malaria were over 90%, and there was a high efficacy of early warning. At 90 percentile, the sensitivities and the specificities of tuberculosis and measles were over 85%, and there was a high efficacy of early warning also. CONCLUSION Control chart based on five years was chose as a essential method in early warning system. The alert threshold for epidemic haemorragia fever, hepatitis A, dysentery, epidemic cerebrospinal meningitis and malaria was 80 percentile. The alert threshold for tuberculosis and measles was 90 percentile.
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Affiliation(s)
- Wei-Zhong Yang
- Chinese Center for Disease Control and Prevention, Beijing 100050, China
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Liu F, Liu Y, Jin B, Dong BQ, Zhu Y. Preparation and characterization of monoclonal antibodies against GAM protein: a novel gp130-associated molecule. Hybridoma (Larchmt) 1999; 18:351-7. [PMID: 10571265 DOI: 10.1089/hyb.1999.18.351] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
gp130-associated-molecule (GAM) is a recently cloned 24-kDa protein, which binds to gp130 at its cytoplasmic membrane-proximal region and has high homology with the N-terminal of Groucho/TLE molecules, a transcription co-repressor family playing an essential role in Notch signaling. Expression of GAM in COS7 cells inhibited the association of JAKs with gp130, and decreased the tyrosine phosphorylation level of these molecules as well. To further investigate the function of GAM, monoclonal antibodies (MAbs) to GAM were prepared. First, GAM-Thioredoxin(Thio) fusion protein was expressed in E. coli and purified with anti-Thio PAb coupled Sepharose-4B. Using purified GAM-Thio as immunogen, three MAbs against GAM with high affinity were raised by conventional B-lymphocyte hybridoma technique. They could recognize different epitopes of nature and denatured GAM-Thio without any cross-reaction with Thio or components of E. coli or with TLE1-GST fusion protein. In Western blotting and flow cytometric assay, these MAbs can detect cellular GAM protein and verify the increase of GAM expressing in GAM cDNA permanently transfected M1 cells. Furthermore, Western blotting with these MAbs indicated that GAM formed 110 kDa polymers in the nucleus. These MAbs represent powerful in investigating the role of GAM in gp130 signaling and Notch signaling.
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Affiliation(s)
- F Liu
- Department of Immunology, The 4th Military Medical University, Xi'an, P.R. China
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