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Objective:To analyze the clinical characteristics in patients with persistent positive pharyngeal swab of 2019 novel coronavirus Omicron variant and results of nucleic acid testing of anal swabs to provide basis for prevention and control measures.Methods:This study included 93 patients whose pharyngeal swab nucleic acid test were persistent positive and admitted to the ward of Daping Hospital in the National Exhibition and Convention Center (Shanghai) Makeshift Hospital from May 1 to May 24, 2022. The gender, age, underlying diseases, vaccination status, clinical symptoms, interval between infection onset and anal sampling, length of hospital stay, the nucleic acid test result of pharyngeal swabs and anal swabs and the time turning negative were collected and analyzed.Results:The age of 93 patients ranged from 8 to 72 years old with a median of (46.0±16.0) years old. Among them, 30 cases (32.3%) were male and 63 cases (67.7%) were female. Sixty-five patients (69.9%) received 2-3 shots of vaccine, 2 patients (2.1%) received 1 shot, and 26 patients (28.0%) did not receive any vaccination. Twenty patients (21.5%) had underlying diseases, of which hypertension (13 cases, 14.0%) and type 2 diabetes mellitus (6 cases, 6.5%) were the most common. Twenty-four patients (25.8%) had asymptomatic infection and the rest (69 cases, 74.2%) had mild symptoms. Cough (50 cases, 53.8%) and sore throat (28 cases, 30.1%) were the most common clinical manifestations of the upper respiratory tract in these patients. Only 6 patients (6.5%) had gastrointestinal symptoms (including diarrhea in 5 patients and diarrhea with vomiting in 1 patient). Pharyngeal and anal swabs were collected simultaneously from all 93 patients at 8-16th days [(11.55±2.27) days] after 2019 novel coronavirus Omicron variant infection. The pharyngeal swabs were positive in 79 patients (85.0%) and the anal swabs were positive in 5 patients (5.4%). The time of pharyngeal swabs turning negative was (14.7±2.9) days, and that of anal swab turning positive was (14.2±1.9) days. The median length of hospital stay was (16.7±2.9) days.Conclusions:In patients with persistent positive nucleic acid of the 2019 novel coronavirus Omicron variant, there were more mild infection than asymptomatic. The upper respiratory tract symptoms such as cough and sore throat were the most. The likelihood of transmission of 2019 novel coronavirus Omicron variant through the digestive tract may be low. The correlation between gastrointestinal symptoms and 2019 novel coronavirus Omicron variant RNA in the digestive tract is uncertain.
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To evaluate the absorptive characteristics of furfural onto biomass charcoals derived from rice husk pyrolysis, we studied the information of the structure and surface chemistry properties of the rice husk charcoals modified by thermal treatment under nitrogen and carbon dioxide flow and adsorption mechanism of furfural. The modified samples are labeled as RH-N2 and RH-CO2. Fresh rice husk charcoal sample (RH-450) and modified samples were characterized by elemental analysis, nitrogen adsorption-desorption isotherms, Fourier-transform infrared spectroscopy and Boehm titration. The results show that fresh rice husk charcoal obtained at 450 degrees C had a large number of organic groups on its surface and poor pore structure. After the modification under nitrogen and carbon dioxide flow, oxygenic organics in rice husk charcoals decompose further, leading to the reduction of acidic functional groups on charcoals surface, and the increase of the pyrone structures of the basic groups. Meanwhile, pore structure was improved significantly and the surface area was increased, especially for the micropores. This resulted in the increase of π-π dispersion between the surfaces of rice husk charcoals and furfural molecular. With making comprehensive consideration of π-π dispersion and pore structure, the best removal efficiency of furfural was obtained by rice husk charcoal modified under carbon dioxide flow.
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Adsorption , Biomass , Carbon Dioxide , Charcoal , Furaldehyde , Chemistry , Nitrogen , Oryza , Spectroscopy, Fourier Transform Infrared , Surface PropertiesABSTRACT
Objective To analyze the application of non-protective midwifery in China so as to provide a theoretic basis for the develop-ment of this technique. Methods The full-text literatures of non-protective midwifery published in China during January 2004 and January 2014 were searched and obtained in China National Knowledge Infrastructure ( CNKI) ,Wanfang Database and VIP Database via computer. All searched literatures were analyzed with the literature study method. Results Totally 21 literatures were obtained by search. They were centrally from the coastal areas and mainly the controlled studies,and focused on the comparison of non-protective midwifery vs. protective midwifery in perineal laceration,second birth course and intrapartum bleeding volume. Conclusion The literatures show that non-protective midwifery is significantly beneficial for patients,though it develops later and concentrates at partial areas. Such midwifery technique shall be popularized all around the country.
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OBJECTIVE:To analyze the effect of precision filtration infusion apparatus and other methods on reduction of ADR induced by Acanthopanax injection. METHODS:532 patients receiving intravenous infusion of Acanthopanax injection were randomly divided into observation group and control group;observation group used disposable precision filtration infusion appara-tus,while control group used disposable ordinary infusion apparatus. The occurrence of ADR were compared between 2 groups. RE-SULTS:The incidence of ADR in observation group(2.68%)was significantly lower than in control group(7.75%),with statisti-cal significance(P<0.05). CONCLUSIONS:Intravenous infusion of Acanthopanax injection with disposable precision filtration in-fusion apparatus can effectively reduce the occurrence of ADR.
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<p><b>OBJECTIVE</b>To investigate the differential gene expression profile of the lung tissues in experimental silicosis rats and to screen for and identify the key signal transduction pathways in pulmonary silicotic fibrosis.</p><p><b>METHODS</b>A total of 80 rats were randomly divided into control group (n = 40) and silica-instilled group (n = 40). Each group was equally divided into five subgroups, and each subgroup was treated at 1, 7, 14, 21, or 28 d. Intratracheal instillation was used to give 1 ml of silica suspension (50 mg/ml) in the silica-instilled group and normal saline in the control group. Silicotic nodules and type I and III collagen were observed through hematoxylin and eosin staining and Sirius red staining, respectively. Differentially expressed genes in pulmonary silicotic fibrosis were selected by the rat whole-genome gene expression RatRef-12 BeadChip (Illumina, USA), and a fold change cutoff was applied. Quantitative real-time polymerase chain reaction (qRT-PCR) was also used to verify differentially expressed genes. Through bioinformatics databases such as Visualization and Integrated Discovery (DAVID) and Kyoto Encyclopedia of Genes and Genomes (KEGG), preliminary research was performed on the biological pathways of differential genes, key biological signal transduction pathways were identified, and key differentially expressed genes in each pathway at different time points were searched for.</p><p><b>RESULTS</b>A total of 2694 genes were differentially expressed and changed dynamically. The KEGG pathway analysis showed that 141 signal transduction pathways were involved in the development and progression of pulmonary silicotic fibrosis, among which 48 pathways were more significant than others (P < 0.01), with the mitogen-activated protein kinase (MAPK) pathway exceptionally significant. The differentially expressed genes interleukin-1 receptor (IL-1R), tumor necrosis factor receptor (TNFR), and transforming growth factor beta (TGF-β) in the MAPK pathway were up-regulated at different time points after silica instillation. The results of real-time PCR showed that granulocyte-macrophage colony-stimulating factor (GM-CSF) was over-expressed at 4 time points and under-expressed at 1 time point compared with the control group.</p><p><b>CONCLUSION</b>The MAPK signal transduction pathway plays a very important role in the development of pulmonary silicotic fibrosis. Both IL-1R and TNFR may play major roles during inflammation phase through the P38/Jun N-terminal kinase (JNK) pathway, and TGF-β may have important function through the extracellular-signal-regulated kinase (ERK) pathway in the formation of fibrosis.</p>
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Animals , Male , Rats , Gene Expression , Lung , Metabolism , Pathology , Pulmonary Fibrosis , Genetics , Metabolism , Pathology , Rats, Wistar , Signal Transduction , Silicosis , Genetics , Metabolism , PathologyABSTRACT
Objective To discuss the features,such as clinical symptoms,pathologic morphologies,immunohistochemical staining of minimal deviation adenocarcinoma and microglandular hyperplasia of the uterine cervix in order to improve the accuracy of pathological diagnosis.Methods s:Histopathologic characteristics of total hysterectomies in 2 cases of minimal deviation adenocarcinoma and 1 case of cervical microglandular hyperplasia based on the formalin-fixed,paralfin-embedded and hematoxylin-eosin stained tissue were analyzed retrospectively.Immunohistochemical staining was used to detect the expression of CEA,p53,PCNA,and Ki-67 in all 3 cases.Results The main clinical symptoms of minimal deviation adenocarcinoma were watery leucorrhea and enlargement of the cervix.The pathological findings of MDA included hyperplasia of the glands with cytological minimal atypia,invasion effects into the stroma could be observed in some glands and abortive glands with desmoplastic changes,or edema and inflammatory infiltration around the glands were also observed.The invasion presented in the deep part of the cervix as well.The patiant of MGH had a history of oval contraceptive use.Histological features of MGH included tightly packed glands in different sizes and shapes,presentation of inflammatory cells in stroma and glandular lumens,and focal epithelial cell pleomorphism and hyperchromatism but without mitosis.CEA was positive in all two MDA cases,but the tissue of MGH was negative for CEA.The expressions of the other four markers had no difference between MDA and MGH.Conclusions For patients with watery discharge and/or hypertrophy of cervix,the deep ( ＞ 5 mm ) biopsies should be performed.The immunohistochemical staining for CEA,p53,CA125 and ER has adjuvant diagnostic values.It is extremely important to recognize that MGH is an entirely benign lesion.
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This study sought to elucidate the effect of mechanical strain on the differentiation of mesenchymal stem cells into osteoblasts. Under the conditons of inducing osteoblasts, Immunohistochemical methods and RT-PCR technology were applied in osteogenic supplements medium to detect: (1) the expression of Alkaline phosphatase (ALP), Type I collagen (COL I ), Osterx (Osx) and Osteocalcin (OCN) mRNA, with cyclic strain (3%, 0.5 Hz) applied for 15 min, 30 min, 1 h, 2 h, 4 h, 3 d, 7 d, 14 d; (2) the expression of Osx mRNA and OCN mRNA with 3% strain for 1 h. The results showed: (1) ALP mRNA expression was higher at 7 days; COL I mRNA expression was greater obviously at 7 days and 14 days than that at 3 days and that of the unstrained cells; (2) the expression of Osx mRNA was up-regulated after 15min by strain stimulation,which was significantly increased at 30 min and 1 h in the unstrained cells. The expression of OCN mRNA was not affected in the unstrained cells at 15 min, whereas strain could promote the expression of OCN mRNA at this period. The expression of OCN mRNA was more obviously upregulated in the strained cells at 30 min and 1 h when compared with that in the unstrained cells; (3) the strain (1% and 3%) significantly promoted the expression of Osx mRNA; 10% strain had a little effect on Osx mRNA expression. The expression of OCN mRNA was up-regulated by 3% strain, whereas it had little effect at 1% and 10% strain. In summary, mechanical strain can promote the differentiation of mesenchymal stem cells into osteoblasts.
Subject(s)
Animals , Mice , Bone Marrow Cells , Cell Biology , Cell Differentiation , Cells, Cultured , Mechanoreceptors , Physiology , Mechanotransduction, Cellular , Physiology , Mesenchymal Stem Cells , Cell Biology , Osteoblasts , Cell Biology , Osteocalcin , Genetics , Metabolism , RNA, Messenger , Genetics , Metabolism , Sp7 Transcription Factor , Stress, Mechanical , Transcription Factors , Genetics , MetabolismABSTRACT
Objective To evaluate the diagnostic value of H-FABP for early detection of acute myocardial infarction(AMI). Methods Serum H-FABP of 126 healthy individuals and 53 AMI patients were measured by self developed ELISA. MYO, cTnI and CK-MB, traditional biochemistry diagnostic markers were estimated at the same time. The dynamic movement of these myocardial indicators for AMI patients, and their diagnostic sensitivity and specificity in the earlier period of AMI onset was analyzed. Results The plasma concentration of H-FABP began to increase at (1.84?0.64) h after AMI onset, earlier than CK-MB and cTnI. The time-concentration dynamic curves of H-FABP was similar to that of MYO and moved to left in comparison with both CK-MB and cTnI. The sensitivity and specificity of H-FABP at 2 h after AMI were 76.47% and 80.41%, and 89.16% and 91.26% at 4 h, respectively;. Conclusions H-FABP is more sensitive and specific in the early diagnosis of AMI within 2 hours and at 4 hours after symptom onset. It is hoped that H-FABP become an important myocardial marker for both early diagnosis and elimination diagnosis of AMI.