Objective To evaluate the method of detecting antibodies to Bacillus anthracis by enzymelinked immunosorbent assay(ELISA)using crude antigen.Methods The anti-Bacillus anthracis antibody levels in sera of 42 healthy people and 42 patients were detected by indirect ELISA.Standard curve was plotted using the data from positive controls,based on which the relative content of each serum was calculated and compared with the result of rLF.Results The median of antibody's relative content in patient group and healthy people group are 1.19 and 0.24,the differences being statistically significant(uc=7.643,P＜0.05).The result of crude antigen is in concordance with rLF(but not parallel absolutely).Conclusions Crude antigen can distinguish most of patients with healthy population effectively.The results suggested that crude antigen is applicable in anti-Bacillus anthracis antibody surveillance.

Objective To investigate the prevalence of children dental fluorosis in drinking-water-borne endemic fluorosis areas in Liaoning province and to evaluate the disease prevention effects of water improvement measures.Methods Haicheng city,Linghai city,Faku county,Fumeng county,Liaoyang county and Jianping county six endemic fluorosis diseased counties (cities) of Liaoning province were included in the study in September 2011.In each county,3 water improvement villages were selected as survey points.In each surveyed village,children aged 8-12 were generally surveyed the prevalence of dental fluorosis.One tap water sample was collected in each surveyed village for determination of water fluorine.level.Results A total of 786 children aged 8-12 were examined; 110 of them were found with dental fluorosis; detection rate of dental fluorosis was 14.0％ ; no defect case of dental fluorosis was found,and dental fluorosis index was 0.27.Among the cases,very mild were 76 cases,and the detection rate was 9.7％; mild 33 cases,the detection rate was 4.2％; moderate 1 case,the detection rate was 0.1％; and no severe case.Four cases were in the eight-year-old group,accounting for 3.6％ of the total number of cases; 20 in the 9-year-old group,accounting for 18.2％ ; 26 in the 10-year-old group,accounting for 23.6％; 32 in the 11-year-old group,accounting for 29.1％; and 28 in the 12-year-old group,accounting for 25.5％.The differences of detection rates of dental fluorosis of children in each age groups were statistically significant (x2 =13.57,P ＜ 0.05).Water fluoride of the 18 water samples ranged from 0.34 to 2.03 mg/L; 77.8％ (14/18) of the water improvement areas reached the control standard for endemic fluorosis areas.Conclusion The prevalence of dental fluorosis in the areas with high fluoride in drinking water remains high,the measures of water improvement should be strengthened.

BACKGROUND:Anti-infective ability determine the success or failure of skin grafting. It is one of the commonly used methods to enhance the anti-infective ability of implants by compounding antibacterial materials with scaffolds. OBJECTIVE:To investigate the effect of porous collagen/silk fibroin scaffolds carrying zinc oxide nanoparticles against infection and inflammation, and to evaluate its effect on wound healing. METHODS:Thirty-two Sprague-Dawley rats with a full-thickness wound on the back skin were randomly divided into two groups. In experimental groiup, porous collagen/silk fibroin scaffolds containing zinc oxide nanoparticles were implanted, while only collagen/silk fibroin scaffolds were implanted in control group. Wound healing was compared between the two groups by measuring residual wound area at 1, 2, 4, 8 weeks post implantation. Hematoxylin-eosin and interleukin 6 immumohistochemical staining were performed at 1, 2, 4 weeks post implantation to observe wound morphology and inflammatory reactions. Meanwhile, expression of interleukin 6 and interleukin 1β was detected by real-time PCR. RESULTS AND CONCLUSION:(1) At 2, 4, 8 weeks post implantation, significantly increased healing rate was observed in the experiment group compared with the control group (P<0.05). (2) Findings from the hematoxylin-eosin staining showed that obvious inflammatory cell infiltration was observed in the control group, but less inflammation with vigorous growth of granulation tissues on the wound surface occurred in the experimental group at 1 week after implantation. Then, the wound repair was basically completed in the experimental group presenting with complete and compact epidermal tissue structure, while scar formation with no skin cover was found in the control group at 4 weeks after implantation. (3) Findings from the interleukin 6 immumohistochemical staining showed that there was interleukin 6 positive expression in both two groups to different extents; at 4 weeks after implantation, the expression of interleukin 6 was remarkably reduced in the control group, but it was still a strong positive expression, while week positive expression of interleukin 6 was observed in the experimental group. (4) Compared with the control group, the mRNA expression of interleukin 6 and interleukin 1β was both lower in the experimental group at 1, 2, 4 weeks after implantation, but there was a significant difference between the two groups at 1 and 2 weeks after implantation (P<0.05). Overall, the porous collagen/silk fibroin scaffold carrying zinc oxide nanoparticles can effectively reduce inflammations following skin injury, and accelerate skin wound healing.

OBJECTIVESTo establish the testicular fibrosis model in rats.

METHODSWistar rats were divided into control group(n = 12) and model group(n = 40) randomly. Testicular fibrosis model was built with the classical method of establishing experimental autoimmune orchitis (EAO) combined with injecting Bacille Calmette-Guerin (BCG) into left testis.

RESULTSThe incidence rate of EAO and the rate of testicular fibrosis were 100%, 11.1% and 100%, 81.5% at 80, 140 days after the first infection, respectively.

CONCLUSIONSThe model of rat testicular fibrosis was established successfully.

Animals ; Autoimmune Diseases ; pathology ; Disease Models, Animal ; Fibrosis ; Male ; Mycobacterium bovis ; Orchitis ; pathology ; Rats ; Rats, Wistar ; Testis ; pathology

The ICR(Institute of Cancer Research)mouse infection model was constructed to study the pathogenicity of Sal-monella Telelkebir serotype,and the pathogenic identification of mouse isolates was carried out.Observe the bacterial excretion cycle,evaluate the pathogenicity of Salmonella serotype to mice,and calculate the LD50 by the changes in clinical characteris-tics,histopathology and tissue bacterial load of infected mice;by flight mass spectrometry,biochemical identification,serotype identification,molecular typing and other experiments,compared with human isolates;virulence gene analysis was carried out by PCR experiment and whole genome sequencing.The LD50 of Salmonella Telelkebir is 2.67 × 108 CFU/mL;curling and fluffing may occur 0.5 h after infection;autopsy of dead mice showed that the small intestine was severely congested,with more bubbles and fluid accumulation,cecal necrosis,liver apical degeneration and necrosis,necrotic foci on the surface of the kidney and spleen atrophy;the bacterial load of spleen,kidney,lung,liver and jejunum in mice reached its peak at 3 days after infection,while that of heart at 6 days;the bacterial excretion time of the high-dose group exceeded 100 days;The level of CD3 in tissues increased with increasing dose,with inflammatory cell infiltration,myocardial capillary dilation and hyperemia,large area of vacuoles,degeneration and necrosis of hepatocytes,obvious enlargement of splenic sinus,blurred zoning,thickening of glomerular basement membrane,partial exfoliation of ciliated epithelium,atrophy and exfoliation of jejunal villi;PCR and whole genome sequencing revealed Salmonella-related virulence genes such as cdtB,plt A and pltB.This study was the first to successfully establish the ICR mouse model of Salmonella Telelkebir,demonstrating that this serotype of Salmonella has some pathogenicity.

Objective To establish information management systems of drinking water defluoridation project in water-related endemic fluorosis areas and investigate the status of drinking water defluoridation project in Liaoning, provide the basis for the development of control measures. Methods Global positioning systems (GPS)and geographic information systems(GIS) were used in the study in August 2006 - July 2008. Water defluoridation projects of 1234 in 48 counties(cities, districts) in drinking water type of fluorosis areas were positioned. Latitude and longitude, water samples, water fluoride content were collected or tested. GIS was used to establish information management system of water defluoridation projects. Results We have established information management system for the facilities of decreasing water fluorine in drinking water type of endemic fluorosis regions in Liaoning. One thousand two hundred and thirty four defluoridation facilities distributed in east longitude between 39.39° - 43.37°,north latitude between 119.25° - 125.50°, and altitude between - 6.60 and 801.14 meter in 48 endemic fluorosis counties in 13 cities. Nine hundred and twenty seven facilities for decreasing fluorine were able to supply water regularly, accounting for 75.1% of investigated projects;29 facilities was .not yet completely rebuilt, accounting for 2.4%;278 facilities(supply water for 344 villages) were out of order or discarded for 22.5% of investigated projects.Water fluorine contents of 63 facilities were greater than 1.2 mg/L, accounting for 6.8% of investigation project.Facilities working regularly and water fluorine was in accord with hygienic standard for drinking water facilities were 70.0%. Conclusions The establishment of Liaoning province defluoridation project information management system in the whole province of drinking water type of fluorosis areas provides scientific basis for accurate decision-making on prevention and control of the disease.

Most patients with differentiated thyroid cancer have a good prognosis after radioiodine-131 therapy,but a small number of patients are insensitive to radioiodine-131 therapy and even continue to develop disease.At present,some targeted drugs can improve progression-free survival in patients with radioactive iodine-refractory differentiated thyroid cancer(RAIR-DTC),such as sorafenib and levatinib,have been approved for the treatment of RAIR-DTC.However,due to the presence of primary and acquired drug resistance,drug efficacy in these patients is unsatisfactory.This review introduces the acquired drug resistance mechanism of sorafenib in the regulation of mitogen-activated protein kinase(MAPK)and phosphatidylinositol-3-kinase(PI3K)pathways and proposes related treatment strategies,in order to provide a reference for similar drug resistance mechanism of sorafenib and effective treatment of RAIR-DTC.

OBJECTIVETo study how to perform the hearing screening on the infants in the rural area.

METHODSThree thousand nine hundreds and twenty-two infants, about 84% of them from rural, were born in the People Hospital of LaiZhou City from January to December in 2004. The infants were performed fast hearing screening by transient evoked otoacoustic emission (TEOAE) after the birth in 2-7 days. The fail cases were checked again after 4-6 weeks, and then were diagnosed if they still failed after following-up.

RESULTSThe infants (3612/3922, 92.1%) have been checked by TEOAE, and the examination was free in the poverty cases. The rate passed on the first check was 69.96% (2527/3922), but 1085 infants failed (30.4%), while 310 infants have not been checked (7.9%). In the 1085 cases that should be rechecked, there was only 633 cases (58.34%) accepted the check on time, while 452 cases (41.66%) missed. In the 163 cases with high-risk infants in 2004, 114 infants (69.96%) were checked, but 49 infants (29.04%) were not checked. Fourteen cases failed in the recheck, and 11 of them were checked by ABR. Two cases were found to be moderate and severe hearing loss in binaural respectively and 4 cases with mild hearing loss in monaural while 3 cases were normal.

CONCLUSIONSIt is necessary and viable for the infants on hearing screening in the rural area It should be set up and perfected the model for infants on hearing screening in rural area as soon as possible; it should be free for the poor infants to make sure everyone enjoy the health care.

China ; Hearing Tests ; Humans ; Infant, Newborn ; Neonatal Screening ; methods ; Otoacoustic Emissions, Spontaneous ; Rural Population

OBJECTIVESevere acute respiratory syndrome (SARS) is an emerging infectious disease that first manifested in humans in November 2002. The SARS-associated coronavirus (SARS-CoV) has been identified as the causal agent, but the pathology and pathogenesis are still not quite clear.

METHODSPost-mortem lung samples from six patients who died from SARS from April to July 2003 were studied by light and electron microscopy, Masson trichromal staining and immunohistochemistry. Evidence of infection with the SARS-CoV was determined by reverse-transcription PCR (RT-PCR) , serological examination and electron microscopy.

RESULTSFour of six patients had serological and RT-PCR evidence of recent infection of SARS-CoV. Morphologic changes are summarized as follows: (1) Diffuse and bilateral lung consolidation was seen in all patients (6/6) with increasing lung weight. (2) Diffuse alveolar damage was universal (6/6) with hyaline membrane formation (6/6), intra-alveolar edema/hemorrhage (6/6), fibrin deposition (6/6), pneumocyte desquamation (6/6). A marked disruption in the integrity of the alveolar epithelium was confirmed by immunostaining for the epithelial marker AE1/AE3 (6/6). (3) Type II pneumocytes, with mild hyperplasia, atypia, cytomegaly with granular amphophilic cytoplasm and intracytoplasmic lipid accumulation (5/6). (4) Giant cells in the alveoli were seen in five of 6 patients (5/6) , most of which were positive for the epithelial marker AE1/AE3 (5/6), but some cells were positive for the macrophage marker CD68(2/6). (5) A pronounced increase of macrophages were seen in the alveoli and the interstitium of the lung (6/6), which was confirmed by histological study and immunohistochemistry. (6) Haemophagocytosis was present in five of the 6 patients(5/6). (7) Lung fibrosis was seen in five patients(5/6), with alveolar septa and interstitium thickening(5/6), intraalveolar organizing exudates (6/6) and pleura thickening (4/6). Proliferation of collagen was confirmed by Masson trichromal staining, most of which was type III collagen by immunostaining. The formation of distinctive fibroblast/myofibroblast foci was seen in five patients (5/6) by light microscopy and immunochemistry. (8) Squamous metaplasia of bronchial mucosa was seen in five patients(5/6). (9) Thrombi was seen in all patients(6/6). (10) Accompanying infection was present in two patients, one was bacteria, the other was fungus. In addition, electron microscopy revealed viral particles in the cytoplasm of alveolar epithelial cells and endothelial cells corresponding to coronavirus.

CONCLUSIONDirect injury of SARS-CoV on alveolar epithelium, prominent macrophage infiltration and distinctive fibroblast/myofibroblast proliferation may play major roles in the pathogenesis of SARS.

Adult ; Antibodies, Monoclonal ; metabolism ; Antigens, CD ; metabolism ; Antigens, Differentiation, Myelomonocytic ; metabolism ; Epithelium ; pathology ; Female ; Humans ; Keratins ; immunology ; Lung ; pathology ; ultrastructure ; virology ; Male ; Middle Aged ; Pulmonary Alveoli ; pathology ; Pulmonary Fibrosis ; etiology ; pathology ; SARS Virus ; isolation & purification ; Severe Acute Respiratory Syndrome ; complications ; metabolism ; pathology ; virology

OBJECTIVETo analysis the outcome of modified closure bone setting manipulation for the treatment of femoral neck fracture.

METHODSFrom January 2012 to December 2012, 47 cases of femoral neck fracture were treated and included 25 males and 22 females with an average age of (44.58±10.32) years old ranging from 23 to 61 years old. All patients had a history of trauma, hip pain and movement limited, limb shortening extorsion deformity, X-ray showed fracture between femoral head and femoral neck basic. Among them, 32 cases were Garden type III and 15 cases were type IV. Patients were performed surgical treatment at 2 to 5 days after admission with 45 degrees abduction and extension position, internal rotation reduction, and 3 guide pins were inverted in a equilateral triangular structure of upside down arrangement. The postoperative recovery quality, fracture healing, femoral head necrosis and hip function were observed.

RESULTSOperation time was 40 to 70 min, intraoperative bleeding was 20 to 50 ml. All patients received good reposition, and the intraoperative perspective was 12 to 25 times. Forty-five patients were followed up for 24 to 36 months, and 2 cases were lost. Fracture of 45 cases were got bony healing, 3 cases with partial necrosis of femoral head, both in the ARCO stage II. Twenty-four months after operation, Harris hip function score was 43.24±2.74 in pain, 42.82±1.95 in function, 3.72±0.45 in deformity, 2.77±0.52 in activity, 92.56±4.42 in total;the outcome was excellent in 39 cases, good in 4 cases, fair in 2 cases, without unbroken nails, infection, deep venous thrombosis, fracture and other complications.

CONCLUSIONSTreatment of femoral neck fracture with the modified bone setting manipulation has an advantages of good effect, postoperative hip function recovery, curative effect.