PubMed | Huizhou First Municipal Peoples Hospital, U.S. Center for Disease Control and Prevention, Zhaoqing Peoples Hospital, Guangdong Academy of Medical science and 21 more.
Type: Journal Article | Journal: European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology | Year: 2016
Dengue is a rapidly spreading mosquito-borne disease caused by the dengue virus (DENV) and has emerged as a severe public health problem around the world. Guangdong, one of the southern Chinese provinces, experienced a serious outbreak of dengue in 2014, which was believed to be the worst dengue epidemic in China over the last 20 years. To better understand the epidemic, we collected the epidemiological data of the outbreak and analyzed 14,594 clinically suspected dengue patients from 25 hospitals in Guangdong. Dengue cases were then laboratory-confirmed by the detection of DENV non-structural protein 1 (NS1) antigen and/or DENV RNA. Afterwards, clinical manifestations of dengue patients were analyzed and 93 laboratory-positive serum specimens were chosen for the DENV serotyping and molecular analysis. Our data showed that the 2014 dengue outbreak in Guangdong had spread to 20 cities and more than 45 thousand people suffered from dengue fever. Of 14,594 participants, 11,387 were definitively diagnosed. Most manifested with a typical non-severe clinical course, and 1.96 % developed to severe dengue. The strains isolated successfully from the serum samples were identified as DENV-1. Genetic analyses revealed that the strains were classified into genotypes I and V of DENV-1, and the dengue epidemic of Guangdong in 2014 was caused by indigenous cases and imported cases from the neighboring Southeast Asian countries of Malaysia and Singapore. Overall, our study is informative and significant to the 2014 dengue outbreak in Guangdong and will provide crucial implications for dengue prevention and control in China and elsewhere.
Chen Q.,Chaozhou Central Hospital |
Chen Q.,Jilin University |
Xie L.-X.,Chaozhou Hybribio Ltd Corporation |
Qing Z.-R.,Chaozhou Hybribio Ltd Corporation |
And 17 more authors.
PLoS ONE | Year: 2012
Background: Human papilloma virus (HPV) infection was the main cause of cervical cancer. There were only a few reports and detailed data about epidemiological research of HPV infection in rural population of China. Materials and Methods: The cervical cells of rural Chaozhou women were collected, and multiplex real time PCR was firstly performed to detect high-risk HPV (HR-HPV) infection, which could detect 13 types of HR-HPV (types 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, and 68). Then, HPV-positive samples were typed by HPV GenoArray test. Results: HR-HPV DNA was detected by multiplex real time-PCR in 3830 of 48559 cases (7.89%). There was a peak incidence in age of 55-60 years group, and a lower incidence in who lived in plain group compared with suburban, mountain and seashore group. 3380 cases of HPV positive sample were genotyped, 11.01% (372/3380) cases could not be classified, among the typed 3008 cases, 101 cases were identified without HR-HPV type infection, 2907 cases were infected with one HR-HPV type at least, the 6 most common HR-HPV types in descending order of infection, were type 52 (33.4%, 16 (20.95%), 58 (15.93%), 33 (9.94%), 68 (9.22%) and 18 (8.36%). The combined prevalence of HPV types 16 and 18 accounted for 28.52% of total infection. However, type 52 plus 58 presented 48.23% of total infection. 2209/2907 cases were infected with a single HPV type and 698/2907 cases were infected with multiple types, and multiple infection constituent ratio increased with age, with a peak incidence in age 55-60 years group. Conclusions: Our findings showed low prevalence of HPV vaccine types (16 and 18) and relatively high prevalence of HPV-52 and -58, support the hypothesis that the second-generation HPV vaccines including HPV-52 and -58 may offer higher protection for women in rural Guangdong Province. © 2012 Yang et al.
Chen Q.,Jilin University |
Chen Q.,Laboratory Medical Center |
Luo Z.-Y.,Laboratory Medical Center |
Lin L.,Laboratory Medical Center |
And 8 more authors.
Asian Pacific Journal of Cancer Prevention | Year: 2012
Background: Human papillomavirus (HPV) infection is the main cause of cervical cancer. Limited epidemiologic data of HPV prevalence are available for women attending hospitals in southern China. This study aimed to evaluate the profiles of HPV infection and cytology status in gynecological outpatients in Chaozhou City. Methods: A total of 2833 eligible women were enrolled. The HPV GenoArray test was used for HPV detection and genotyping. Nearly one half of the HPV positive women received liquid-based cytology test. Logistic regression analysis was performed to assess the predictable effects of age and genotype for categories of abnormal cytology. Results: The prevalence of overall, high-risk, and low-risk HPV infection were 24.5%, 19.5% and 8.4%, respectively. A U-shaped age-specific prevalence curve was observed in overall HPV and high-risk HPV, but not in low-risk HPV, which declined with age increasing. The 6 most common high-risk HPV type in descending order, were types 52, 16, 58, 18, 68, and 33. Age and HPV genotype were both important determinants of abnormal cytology incidence, the older women (>45 years) and those infected with HPV type 16 and/or 18 having the highest risk for abnormal cytology. Conclusion: Our findings support the hypothesis that second-generation HPV prophylactic vaccines including HPV-52 and -58 may offer higher protection for women residing in Chaozhou and neighboring cities in Guangdong.
Jiang X.-B.,Sun Yat Sen University |
Yuan W.-S.,Chaozhou Central Hospital |
Wang J.-S.,Sun Yat Sen University |
Liu Z.,Sun Yat Sen University |
And 2 more authors.
Journal of NeuroInterventional Surgery | Year: 2014
Background: A swine model of carotid atherosclerosis may greatly facilitate the identification of imaging characteristics of vulnerable plaques and the preclinical evaluation of endovascular intervention. In this study we assess the association of matrix metalloproteinase (MMP)-9 expression and neovascularity in carotid atherosclerotic plaques with MRI patterns in a swine model. Methods: Carotid atherosclerosis models were created in miniswine using a combination of partial ligation and a high cholesterol diet. The animals were imaged in a 1.5 T MR scanner at 3 months and carotid arteries were obtained for histopathological and immunohistochemical examination. Contrast-enhanced T1-weighted imaging (T1WI) was used to match the histology findings. The contrast-to-noise ratio (CNR) of the plaques on T1WI and contrast-enhanced T1WI were measured and the association of MMP-9 expression and neovascularity in the carotid plaque with CNR on MRI was analyzed. Result: Forty carotid artery segments were matched between MRI and histology. All segments were advanced carotid atherosclerotic plaques. The matched contrast-enhanced T1WI and histology slices showed good correlation for ratio of plaque size to lumen diameter (r=0.94, p<0.001). Plaque CNR on contrast-enhanced T1WI was higher in plaques with strong MMP-9 expression than in those with weak MMP-9 expression (p=0.05). Plaque CNR on contrast-enhanced T1WI was also higher in plaques with marked neovascularization than in those without (p=0.02). Conclusions: Increased plaque CNR on contrast-enhanced T1WI is associated with MMP-9 expression and neovascularization in carotid atherosclerotic plaques and may be used to identify vulnerable plaques.
Lin M.,Southern Medical University |
Wang Q.,Southern Medical University |
Zheng L.,Southern Medical University |
Huang Y.,Southern Medical University |
And 4 more authors.
Clinical Genetics | Year: 2012
Prevalence and molecular characterization of abnormal hemoglobin in eastern Guangdong of southern China. Abnormal hemoglobins (Hbs) are the most commonly inherited disorders in humans. Their frequency and types change considerably with geographic location and ethnic group. To investigate the molecular epidemiological characterization of abnormal Hbs in eastern Guangdong of southern China, a total of 11,450 'healthy' subjects were subjected to hemoglobin electrophoresis screening. Samples of EDTA-K2 blood with abnormal Hbs were analyzed by CELL-DYN1700 blood analyzer; thalassemia genotypes and Hb E variant were identified by gap-PCR and/or reverse dot blot (RDB). The genotypes of Hb variants were detected by PCR and sequencing. The incidence of abnormal Hbs was 0.358%(41/11,450) in Chaozhou, including 12.2% (5/41) Hb J, 4.9% (2/41) Hb K, 9.7% (4/41) Hb Q, 31.7% (13/41) Hb G/D and 41.5% (17/41) Hb E. Eight types of Hb variants were found, including 3 cases of Hb J-Bangkok, 2 cases of Hb J-Wenchang-Wuming, 2 cases of Hb New York, 4 cases of Hb Q-Thailand, 5 cases of Hb G-Waimanalo, 4 cases of Hb Ottawa, 4 cases of Hb G-Chinese and 17 cases of Hb E. In comparison with other areas of Guangdong, Chaozhou had a different pattern of abnormal Hbs with a high prevalence of Hb G/D. This study describes the prevalence and molecular characterization of abnormal Hbs in eastern Guangdong. © 2011 John Wiley & Sons A/S.
Wang P.-P.,Chaozhou Central Hospital |
Lin M.,Chaozhou Central Hospital |
Wu J.-R.,Chaozhou Central Hospital |
Wang X.-Y.,Shantou Central Hospital |
Yang L.-Y.,Chaozhou Central Hospital
Molecular Medicine Reports | Year: 2010
Hemoglobin (Hb) G-Chinese [α30 (B11) Glu→Gln], also known as Hb G-Honolulu, Hb G-Hongkong or Hb G-Singapore, was first identified in a Chinese woman in Singapore, and was subsequently observed in several Chinese families. This Hb variant results from a GAG→CAG mutation at codon 30 of the α-globin gene. The aim of the present study was to identify the Hb G-Chinese mutation in three Cantonese individuals. The presence of the Hb variant was confirmed by cellulose acetate electrophoresis. DNA analysis based on the polymerase chain reaction (PCR) and sequencing were conducted to confirm the presence of the mutation in the α-globin gene. A G→C substitution at codon 30 of the α2-globin gene was observed. According to a previous study, the G→C substitution in Hb G-Chinese creates a PstI restriction site; we amplified the α2-globin gene, then digested the PCR products with PstI. The results indicated that only the PCR product of Hb G-Chinese α2-globin was cut by PstI. The digestive products were 120 and 730 bp, respectively. Therefore, we determined that the three cases were of the heterozygous Hb G-Chinese variant.
Huang Y.,Chaozhou Central Hospital |
Lin M.,Chaozhou Central Hospital |
Luo Z.-Y.,Chaozhou Central Hospital |
Li W.-Y.,Chaozhou Central Hospital |
And 2 more authors.
Asian Pacific Journal of Cancer Prevention | Year: 2013
Objective: To investigate the prevalence of genital high-risk human papillomavirus (HR-HPV) in male sexual partners of HR-HPV infected women and the concordance of viral types in couples in China, and comprehend the role of men play in HPV transmission to women. Methods/Materials: 94 asymptomatic women and their husbands from rural Chaozhou participated in epidemiologic screening for HPV infection. Cervical cells from females were collected for high risk HPV screening by real time-PCR, and they were positive for at least 1 of 13 HR-HPV subtypes, then these samples were genotyped. Approximately one mouth later, penile epithelial cells from 94 asymptomatic husbands were collected for HPV genotyping. At the same time, a cross-sectional study was conducted in 366 male patients from sexually transmitted disease (STD) outpatient clinic in China for the prevalence of genital HR-HPV infection in men having frequent sex behavior. Penial epithelial cells were collected for HPV 6/11 and HPV 16/18 detection by fluorescent real-time quantified PCR. Results: Among 94 couples, the prevalence of genital HR-HPV infection in men whose wife was positive for cervical HR-HPV was 5.32% (5/94). Only 2.63% (2/76) had the same high risk viral type presented by their wife. HPV 16 proved to be the most prevalent viral type in men and in couples. Of 366 male patients from STD outpatient clinic, the prevalence of HPV 16/18 infection in men with or without HPV 6/11 was 6.85% and 8.16%, respectively. The incidence of HPV 16/18 was higher in men aged more than 35 years than the young men (18-35 years). Conclusion: The prevalence of genital HR-HPV infection in male sexual partners of HPV-positive women in China was lower than that expected, and the concordance of high risk viral type between couples was extremely low. These data suggested that infected men consitute an important viral reservoir, contributing to transmission of HR-HPV to women and maintenance of infection, but HR-HPV infection may be less likely to persist in men than in women.