China ; epidemiology ; Humans ; Neoplasms ; epidemiology ; Registries

Objective To develop the method of 16S rRNA gene clone library for tick bacterial flora analysis, and to analyze the detection effective of pathogens in tick and capacity of bacterial flora diversity. Methods Primers were designed according to the specific gene of Borrelia burgdorferi, Bartonella henselae, Anaplasma phagocytophilum, Ehrlichia chaffeensis and templates were choosen by positive PCR result to amplify the DNA extracted from the ticks. One set of primers targeting 16S rRNA gene conserved region were chosen to amplify certain fragments, DNA extraction, PCR reaction, cloning and sequencing. Nucleotide sequences were compared with GenBank database. Calculated Coverage values of clone library and Shannon-Wiener diversity index. Results Sixteen defined genus-or species-bacteria were detected in 103 valid sequences. Eight species were edge type (Clone No. > 5). Three kinds of pathogens were identified (Borrelia burgdorferi, Bartonella henselae and Rickettsia sp). Three kinds of pathogens were not edge type(Clone No. < 5). Coverage value was 96.11%, and Shannon-Wiener index was 2.40. Analysis results of cloning sequence showed that tick-parasitic bacteria mainly were α and γ deformation mycetes which accounted for 56.25% (9/16). Conclusions The 16S rRNA gene sequences technology could make relative quantitative of bacterial flora, and detect many kinds of pathogens in tick. It's a good method for detection of pathogens and bacterial flora analysis.

OBJECTIVETo evaluate the effect of desensitizer on shear bond strength of adhesive system.

METHODSTwenty specimens were made and divided randomly into an experiment group and a control group. In the experiment group, the dentin bonding surface was applied with Green Or and in the control, the dentin bonding surface was untreated. The IPS-Empress specimens were bonded to the dentin bonding specimens using Variolink II adhesive system. The shear bond strength of all testing samples was determined with Instron testing machine. The surfaces of the drawing sections were observed using the scanning electron microscope (SEM).

RESULTSThe shear bond strength of the experimental group and the control group was (5.53 +/- 0.96) MPa and (7.32 +/- 1.34) MPa respectively and there was statistically significant difference between two groups (P = 0.003). In the experimental group, adhesive failure was the most prevalent type of failure, while in the control group, cohesive failure was the most prevalent type.

CONCLUSIONSThe application of Green Or on the dentin bonding surface decreased the shear bond strength between dentin and IPS-Empress specimens when using Variolink II adhesive system.

Dental Bonding ; Dental Stress Analysis ; Dentin-Bonding Agents ; chemistry ; Materials Testing ; Resin Cements ; chemistry ; Surface Properties

OBJECTIVETo introduce the clinical experience in transplantation of the anterolateral femoral skin flap.

METHODSA total of 625 anterolateral femoral skin flaps in 600 patients were transplanted from 1988 to 2003. The retrospective analysis was carried out in all the cases as to the flap pedicle, the vascular variations, the surgical procedures and modifications, and the adaptation for a cutaneous-branch-absent flap.

RESULTSThe 625 flaps were transferred except 7 cancelled in the operation. Postoperatively, 17 cases encountered vascular complications, 10 of which survived completely with successful vessel exploration, 3 cases had partial necrosis, and 4 cases had complete necrosis. The survival rate was 97.8%. 545 flaps were pedicled with the descending branch or lateral branches; 45 flaps with the transverse branch or the high-site anterolateral cutaneous artery, 10 cases with the descending-transverse branch, 18 cases with other vessels. 7 cases were found cutaneous-branch-absent. The vessel variation rate of the flap was 4.06%.

CONCLUSIONSThe anterolateral femoral skin flap has less variation of its pedicle and high success rate of operation. It is an ideal choice for repair of soft tissue defects in the extremities.

Adolescent ; Adult ; Child ; Female ; Femur ; Humans ; Male ; Microsurgery ; Middle Aged ; Retrospective Studies ; Skin Transplantation ; Surgical Flaps ; Young Adult

Aged ; Biopsy, Needle ; methods ; Coal Mining ; Humans ; Lung ; pathology ; Lung Neoplasms ; complications ; diagnosis ; Middle Aged ; Pneumoconiosis ; complications

Liver cancer is a common cancer and a leading cause of cancer deaths in China. To aid the government in establishing a control plan for this disease, we provided real-time surveillance information by analyzing liver cancer incidence and mortality in China in 2009 reported by the National Central Cancer Registry. Liver cancer incidence and cases of death were retrieved from the national database using the ICD-10 topography code "C22". Crude incidence and mortality were calculated and stratified by sex, age, and location (urban/rural). China's population in 1982 and Segi (world) population structures were used for age-standardized rates. In cancer registration areas in 2009, the crude incidence of liver cancer was 28.71/100,000, making it the fourth most common cancer in China, third most common in males, and fifth most common in females. The crude mortality of liver cancer was 26.04/100,000, making it the second leading cause of cancer death in China and urban areas and the third leading cause in rural areas. Incidence and mortality were higher in males than in females and were higher in rural areas than in urban areas. The age-specific incidence and mortality were relatively low among age groups under 30 years but dramatically increased and peaked in the 80-84 years old group. These findings confirm that liver cancer is a common and fatal cancer in China. Primary and secondary prevention such as health education, hepatitis B virus vaccination, and early detection should be carried out both in males and females, in urban and rural areas.
Adolescent ; Adult ; Age Factors ; Aged ; Aged, 80 and over ; Child ; Child, Preschool ; China ; epidemiology ; Female ; Humans ; Incidence ; Infant ; Liver Neoplasms ; epidemiology ; mortality ; Male ; Middle Aged ; Registries ; Rural Population ; Sex Factors ; Urban Population ; Young Adult

OBJECTIVECancer is one of the leading causes of death in China. The study aimed to examine the temporal trend of cancer mortality rate during 1989-2008 in urban and rural areas of China.

METHODSThe mortality data of all cancers from 1989 to 2008 from National Cancer Registry database were sorted and checked. Age standardized mortality rates were calculated by the direct methods using the China population of 1982 and World Segi's population. Joinpoint regression was performed to obtain the annual percentage changes (APC) in mortality rates. The top ten cancer sites were calculated and analyzed. The mortality rates were compared with statistics of the United States.

RESULTSFrom 1989 to 2008, the trend of crude cancer mortality increased with an annual percentage change (APC) of 1.0%. After age standardization, the mortality rate was significantly decreased, with an APC of -1.2%. In urban areas, lung cancer was the most common cancer of death, whereas in rural areas, stomach cancer and esophageal cancer remained top cancers of death. Especially, in both urban and rural areas, the mortality of lung cancer was on increase. The mortality rates of stomach and esophageal cancers showed a decrease in urban areas. Compared with the cancer mortality rates of the United States, the Chinese cancer mortality rate in males remained highest. The decreasing trend of cancer mortality in females of China was less obvious than that of the United States.

CONCLUSIONSThe crude mortality rates of cancer in China show an increase whereas the age standardized mortality raters has declined between 1989 and 2008. Cancer is still a major public health issue threatening people's life in China. Effective intervention for cancer control and prevention is needed in the future.

China ; epidemiology ; Esophageal Neoplasms ; mortality ; Female ; Humans ; Lung Neoplasms ; mortality ; Male ; Mortality ; trends ; Neoplasms ; mortality ; Registries ; Rural Population ; Sex Factors ; Stomach Neoplasms ; mortality ; United States ; epidemiology ; Urban Population

OBJECTIVENationwide cancer incidence data were used to analyze the trends of cancer incidence in China in order to provide basic information for making cancer control strategy.

METHODSWe retrieved and re-sorted valid cancer incidence data from the National Central Cancer Registry Database over the 20 year-period 1989-2008. Crude incidence rate and age-standardized incidence rate were calculated for analysis. Annual percent changes in incidence for all cancers combined were estimated using Joinpoint software.

RESULTSThe cancer incidence rate in cancer registration areas was increased from 184.81/10(5) in 1989 to 286.69/10(5) in 2008 (from 209.33/10(5) to 307.04/10(5) in urban and from 176.10/10(5) to 269.57/10(5) in rural areas). Uptrends of crude cancer incidence were shown in both male and female in urban and rural areas over the 20 year-period. After standardized by age, overall incidence rate kept stable with 0.5% annual increase in urban and no change in rural areas. Since 2000, the cancer incidences in both sexes and areas were significantly increased. The incidence increased for most major cancers, especially lung cancer, colorectal cancer, female breast cancer and cervical cancer.

CONCLUSIONSOver the 20 year-period 1989-2008, cancer incidence of most cancers has been increasing by time. The incidences of gastric cancer, liver cancer and esophageal cancer still keep gradually increasing. The incidences of lung cancer, female breast cancer, colorectal cancer and cervical cancer are markedly going up, so that cancer prevention and control should be enhanced. Cancer registration will play an important role on cancer control in China along with the number of registries increasing and data quality improving.

Breast Neoplasms ; epidemiology ; China ; epidemiology ; Colorectal Neoplasms ; epidemiology ; Esophageal Neoplasms ; epidemiology ; Female ; Humans ; Incidence ; Liver Neoplasms ; epidemiology ; Lung Neoplasms ; epidemiology ; Male ; Neoplasms ; epidemiology ; Registries ; Rural Population ; Stomach Neoplasms ; epidemiology ; Urban Population ; Uterine Cervical Neoplasms ; epidemiology

Objective To describe and analyze the characteristics and trend of liver cancer,through data gathered from the Cancer Registry System,in China.Methods Annual registration data on cancer incidents and deaths of 2003-2007,from 32 cancer registries were employed.Crude rates of incidence and mortality,and age-standardized rates by the China population (ASRc) and the world population (ASRw) were calculated.Incidence and mortality rates by age,gender,and by area (urban or rural) were analyzed,and comparison was made internationally,based upon data from the GLOBOCAN 2008.Results The total person-years of 2003-2007 observed from the 32 cancer registries were 255 430 909,in which 197 651 428 from the urban areas,and 57 779 481 from the rural areas.A total of 68 146 incident cases with liver cancer were reported,which accounted for 10.03％(ranked second) of all the registered cases with cancers,with the average annual incidence as 26.68per 100 000 (39.42 in males,13.63 in females).ASRc and ASRw were 13.29 per 100 000 and 17.45per 100 000,respectively.Sex ratios for incidence and mortality were 2.89:1 and 2.72:1,respectively.Incidence rates were 23.91 per 100 000 in urban areas,and 36.15 per 100 000 in rural areas.For mortality rates,they were 22.39 per 100 000 m urban areas and 34.05 per 100 000 in rural areas,respectively.Relative greater differences could be seen amongst these registries.The incidence rates were 10.15-33.85 per 100 000 in the urban areas,and 11.83-78.59 per 100 000 in the rural areas.For mortality rates,they were 13.99-28.45 per 100 000 in urban areas,and 11.02-71.99 per 100 000 in rural areas.According to data from the 184 cancer registries through GLOBOCAN 2008,liver cancer incidence in China was ranked the 5th in males,and 6th in females while mortality was ranked 2nd in males,and 5th in females.Conclusion Liver cancer had been the second most leading malignancy,following lung cancer,with annual incidents and death cases around 360 000 and 350 000,respectively and the figures seemed to be increasing.Nationwide monitoring and research programs on liver cancer should be emphasized.

Objective To analyze the trend of incidence and mortality on thyroid cancer in China.Methods Data from 32 cancer registry sites in China was collected and Jionpoint model was used to obtain the crude,age-specified incidence and mortality,both Chinese national and world age-standardized rates of incidence and mortality and their trends.Results The crude incidence of thyroid cancer was 4.44/105,and the Chinese national and world age-standardized rates were 2.89/105 and 3.31/105 respectively.The crude mortality of thyroid cancer was 0.44/105,with the Chinese national and world age-standardized rates as 0.21/105 and 0.29/105 during 2003-2007 in the country.Thyroid cancer accounted for 1.67％ and 0.26％ of the Chinese national and world age-standardized proportions,for total cancers.Both incidence and mortality of thyroid cancer were higher in females than in males,3.38 and 1.75 times higher in urban areas than those in rural areas.The incidence of thyroid cancer showed annually increase of 14.51％ while the mortality had an increase of 1.42％.Conclusion The incidence and mortality of thyroid cancer increased rapidly in China,calling for more control efforts on this disease.