One-day-old unvaccinated chicks were inoculated with serotype I virulent strain GA and vaccine strain CVI988, serotype III vaccine strain HVT o f Marek's disease viruses(MDV). By using an indirect immunofluorescence assay of suspensions of peripheral blood mononuclear cells(PBMC) with monoclonal antibo dies(MAb) BA4 and BD8 specific to glycoprotein B of MDV, The dynamic course s of vir emia levels for each of 3 strains from 4 days to 45 days postinfection (PI) were determind. Viremia for virulent strain GA-infected chickens were detected from 4 days PI until days before death of infected chickens, it got its peak at abou t 14 days PI. Viremia in serotype 1 vaccine CVI988-inoculated chickens were mea sured between 4 to 22 days PI, it could be detected from 4 days PI and ended at 18 days PI, it got its peak at 8 days PI. For serotype 3 vaccine HVT-inoculated chickens, viremia could be detected beween 4 to 14 days PI, its peak happened a t about 6 days PI. Such IFA with MAbs BA4 and BD8 could be used to evaluate qu al ity of vaccination process in chicken flocks. The differential dynamic courses o f viremia for different strains may be used to diagnose virulent MDV infection i n vaccinated flocks. The viremia levels measured by IFA with the MAbs and co-cu ltivation assay for plague forming unit(PFU) were compared. The results indicate d that IFA assay of PBMC suspension was more sensitive and specific than co-cu ltivation assay, i.e. viremia levels measured by IFA were 30 to 100-fold higher than that by plague-forming assay in CEF for the same sample.

Chitin is one of the most important component in fungal cell wall.Biosynthesis of chitin is a complex processes and needs several chitin synthase isoenzymes.The knowledge of structure,function and regulation of chitin synthases is mainly derived from the study of Saccharomyces cerevisiae.In contrast with the 3 chitin synthases in S.cerevisiae,7 were found in most filamentous fungi.In this review the classification and function of chitin synthases are summerized,and progress in the studies on chitin synthases of filamentous fungi which are of theoretical or medical or agricultural importance,including Aspergillus nidulans,Aspergillus fumigatus and Ustilago maydis are emphasized.Recent ad-vance of research on chitin synthase as antifungal target is also discussed.

Objective:To explore the value of the elasticity contrast index (ECI) in differential diagnosis of thyroid nodules, and contrast the effect of 4 different methods on measuring ECI.Methods:A total of 122 patients with 131 thyroid nodules in Binzhou Medical University Hospital from May 2018 to May 2019 were enrolled, and elastography was performed in 4 different ways such as in axial plane for internal (AI), axial plane for periintranodular (AP), longitudinal plane for internal (LI) and longitudinal plane for periintranodular (LP). The cut-off values for predicting malignant nodules in 4 different ways were determined separately using receiver operating characteristic (ROC) curve analysis.Results:There were 54 benign and 77 malignant ones in 131 nodules. The ECI in AI, AP, LI and LP in benign thyroid nodules was significantly lower than that in malignant ones: 2.10 (1.48, 2.34) vs. 3.07 (2.73, 3.87), 1.91 (1.64, 2.18) vs. 2.62 (2.24, 3.07), 2.19 (1.59, 2.39) vs. 3.00 (2.72, 3.63) and 1.89 (1.71, 2.16) vs. 2.66 (2.21, 3.10), and there was statistical difference ( P<0.05). Among the 4 different ways, the largest area under curve was achieved in AI with 0.925, and the corresponding optimal diagnostic threshold was 2.43 (with 90.9% sensitivity, 87.0% specificity, 88.5% accuracy, 89.7% positive predictive value and 86.8% negative predictive value). Conclusions:ECI is helpful for conventional ultrasound to diagnose thyroid nodules as malignant or benign. The best value is obtained in AI.

Child ; Gene Rearrangement, T-Lymphocyte ; Humans ; Neoplasm, Residual ; diagnosis ; Polymerase Chain Reaction ; methods ; Precursor Cell Lymphoblastic Leukemia-Lymphoma ; diagnosis ; Receptors, Antigen, T-Cell ; genetics

Objective To study the method for determination of micro and trace chloroform and carbon tetrachloride in wa-ter by headspace chromatography.Methods Based on the mild solubility of chloroform and carbon tetrachloride in water,trace chloroform and carbon tetrachloride in water were analysed by static headspace gas chromatography using an OV-101chromato-graphic column.Results The better linear ranges for chloroform and carbon tetrachloride were0.00-20.0?g /L(r=0.9998)and0.00-1.00?g /L(r=0.996)respectively.The detection limits of chloroform and carbon tetrachloride were0.19?g /L and0.01?g /L respectively.The recovery rate of the method was95%-110%.Conclusion The method could be satisfactorily used for determination of chloroform and carbon tetrachloride in mineral water,well water,pure water and source-water with the advantage of less interfering factors and no secondary pollution.

Purpose:To study the relationship between expression of TGF-?_(1) and invasion and metastasis of bladder cancer.Methods:ELISA was used to examine TGF-?_(1) in serum of patients with bladder cancer.Results:Compared to the control group,TGF-?_(1) level in patients serum was higher(P

To investigate the relationship between the level of plasma atrial natriuretic peptides(ANP) and doppler echocardiography parameters in patients with left ventricular diastolic dysfunction, the patients were divided into four groups according to echocardiography parameters and their plasma levels of ANP, which were determined simultaneously.The results showed that along with left ventricular diastolic function was impaired, the level of ANP increased.There were significant relationships between the level of ANP and LAD, E/A, LVDd, LVDs, EDV, ESV, IVRT, DT, S/D, LVEF, LVFS, except for Pva and Pva dur. The results of this study suggest that the level of plasma ANP is a reliable marker of left ventricular diastolic dysfunction.

Cysts ; complications ; Exophthalmos ; complications ; Frontal Sinus ; pathology ; Humans ; Male ; Middle Aged ; Paranasal Sinus Diseases ; complications

Adult ; Bone Marrow ; pathology ; Female ; Humans ; Leg ; Neoplasm Invasiveness ; Rhabdomyosarcoma, Embryonal ; pathology ; therapy