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Objective:To investigate the value of qualitative characteristics of contrast-enhanced ultrasound (CEUS) and VueBox quantitative parameters in the evaluation of pathological molecular typing of breast cancer.Methods:A retrospective analysis was performed on 133 patients with pathologically confirmed breast cancer who underwent CEUS examination in the People′s Hospital of Guangxi Zhuang Autonomous Region from January 2020 to July 2022. The patients were divided into Luminal A type, Luminal B type, human epidermal growth factor receptor-2(HER-2) type and triple negative type according to the results of immunohistochemistry. The differences of qualitative characteristics and quantitative parameters of CEUS in different molecular subtypes of breast cancer were analyzed. The ROC curve was used to evaluate the diagnostic efficacy of CEUS in the differentiation of molecular subtypes of breast cancer.Results:There were significant differences in enhancement intensity, post-enhancement boundary, filling defect and peripheral radial convergence among different molecular subtypes of breast cancer(all P<0.05), while there was no significant difference in enhancement uniformity ( P>0.05). Peak enhancement (PE), wash-in and wash-out areas under the curve (WiWoAUC), and wash-in ratio (WiR) of HER-2 type and triple-negative type breast cancer were higher than Luminal A type and Luminal B type (all P<0.05). ROC curve analysis showed that PE and radial convergence had reasonable diagnostic efficiency in Luminal A type, and the areas under the curve were 0.849 and 0.780, sensitivity was 0.711 and 0.889, specificity was 0.909 and 0.671, accuracy was 0.842 and 0.744, respectively. The areas under the curve of PE in diagnosing Luminal B type was 0.852, the sensitivity, specificity, and accuracy were 0.825, 0.763 and 0.782, respectively. The area under the curve of WiWoAUC and filling defect in diagnosing HER-2 type were 0.912 and 0.898, the sensitivity was 0.903 and 0.903, the specificity was 0.853 and 0.892, and the accuracy was 0.865 and 0.895, respectively. The area under the curve of clear boundary after enhancement in diagnosing triple negative type was 0.919, and the sensitivity, specificity and accuracy were 0.941, 0.897 and 0.902, respectively. Conclusions:There are differences in the qualitative characteristics and quantitative parameters of contrast-enhanced ultrasound in different molecular types of breast cancer. CEUS is suggested as a noninvasive modality for preoperative prediction of molecular subtypes of breast cancer.
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Objective:To learn about the genotyping of human Brucella isolated from Sichuan Province. Methods:BCSP31-PCR and AMOS-PCR were used to identify the genus and biotype of the 66 strains isolated from confirmed human brucellosis cases in Sichuan Province from 2014 to 2020, respectively. The isolated strains were genotyped by multi-locus sequence typing (MLST)-9. The sequence type (ST) was compared trough the online MLST database. A minimum spanning tree (MST) was constructed to cluster the newly discovered and known ST using the BioNumerics software version 7.6.Results:The 66 strains isolated from human cases of brucellosis in Sichuan Province from 2014 to 2020 were Brucella, and 65 of them were Brucella melitensis while one strain was Brucella abortus. The MLST method identified three known STs (ST-8, ST-39 and ST-2) and one newly type (ST-101). Among them, ST-8 was the main ST in Sichuan Province (90.91%, 60/66), another 4 strains of Brucella melitensis were ST-39, and 1 strain of Brucella abortus was ST-2. The newly type ST-101 was isolated from Leshan City in 2019, belonging to the Brucella melitensis and closely related to the evolution of ST-8. Conclusion:Brucella melitensis is the main epidemic Brucella strain in Sichuan Province, ST-8 is predominant genotype, with a small amount of ST-39, ST-101 and ST-2.
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Peripheral T-cell lymphoma (PTCL) is a group of heterogeneous malignant tumors with poor prognosis, with a lack of standard treatment regimen and poor efficacy of traditional chemotherapy. Therefore, finding new and more effective therapeutic targets to improve the efficacy of PTCL is an urgent clinical problem. In recent years, as the exploration of PTCL at the genetic and molecular levels has intensified, novel therapeutic targets based on gene alterations and molecular typing have been identified. This article summarizes the research progress of main gene alterations and molecular typing of PTCL in recent years.
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ObjectiveIn this paper， the cause of an outbreak of foodborne disease in Huzhou City was analyzed， which may help avoid the recurrence of such incidents. MethodsThrough the field epidemiological investigation， the case definition was formulated and the questionnaire survey was carried out in the case group and the control group. In addition， the chi-square test and logistic regression method were used to identify the factors affecting the outbreak. The patient stool samples， food samples， environmental samples and water samples were collected and used for the laboratory test. The PFGE molecular typing was conducted on the isolated positive strains. ResultsThe number of people exposed during the same period was 410， and the number of possible cases was 18， with an incidence of 4.39%. Generally， the main symptoms were abdominal pain and diarrhea， accompanied by nausea， fatigue， fever and others. For case-control analysis， 17 of the 18 patients were included in the case group， and 19 non-patients were into control group. The results suggested that the risk factors were blanched deep-water shrimp（OR=19.42， 95%CI=1.06‒357.02， P=0.046）and steamed Ao Long （Australian lobster） with garlic and vermicelli （OR=22.01， 95%CI=1.24‒390.70， P=0.035）. According to the laboratory test results Vibrio parahaemolyticus （VP） was positive in 5 cases， and the serum type was is O10∶K4. In the reserved food， VP was positive in the samples of steamed Australian lobster with garlic vermicelli and lamb chops. The serum type was O5∶Kut. ConclusionThis incident was an outbreak of foodborne disease caused by the consumption of wedding food contaminated by VP. The dinner was served by Hotel B on September 17. Moreover， the suspicious foods include the blanched deep-water shrimp and steamed lobster with garlic vermicelli.
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ObjectiveTo understand the presence of virulence genes， molecular typing characteristics， and antibiotic sensitivity of enteroaggregative Escherichia coli （EAEC） in children with diarrhea in Shanghai， so as to provide a scientific basis for EAEC monitoring and standardized treatment of EAEC infection. MethodsEAEC strains isolated from children （≤5 years old） with diarrhea in six districts of Shanghai were collected as the study subjects. EAEC virulence genes were detected by real-time fluorescence quantitative PCR， molecular typing was performed by pulsed-field gel electrophoresis （PFGE）， and drug susceptibility tests were conducted using the microbroth dilution method. χ2 test and two independent samples t-test were used to compare the differences in virulence genes and antibiotic resistance between suburban and urban EAEC strains. ResultsFrom 2019 to 2021， the overall detection rates of gene aggR， pic and astA of 59 EAEC were 30.5%， 50.8%， and 57.6%， respectively. There was no significant difference in the detection rates of virulence genes between suburban and urban EAEC strains （P>0.05）. PFGE analysis revealed that only two EAEC strains belonged to the same PFGE pattern and were collected from the same hospital， and the overall PFGE patterns were polymorphic. EAEC showed susceptibility to imipenem and colistin E， and the resistance rates to sulfamethoxazole （SXT）， ampicillin （AMP）， nalidixic acid （NAL）， and tetracycline （93.1%， 79.3%， 63.8%， and 58.6%， respectively） were higher than 50.0%. The antibiotic resistance rates of cefazolin （CFZ）， cefotaxime （CTX）， and ciprofloxacin （CIP） were significantly different between EAEC strains from suburban and urban areas （P<0.05）. A total of 47 strains exhibited multi-drug resistance， with the most common resistance spectrum being AMP-SXT-NAL. There was no statistically significant difference in the number of multidrug-resistant EAEC strains between suburban and urban areas （P>0.05）. ConclusionThe EAEC virulence gene assemblages in children with diarrhea in the six districts of Shanghai are diverse， and the molecular typing patterns are relatively scattered， indicating possible cross-infection of homologous strains. Multi-drug resistance in EAEC strains is relatively common， and there is a statistically significant difference in the resistance rates of CFZ， CTX and CIP between urban and suburban EAEC strains. Attention should be given to standardizing the use of clinical antibiotics to effectively control the dissemination of multidrug-resistant EAEC strains.
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MicroRNA (miRNA) plays an important role in the development of diffuse large B-cell lymphoma (DLBCL) by binding to the 3′ non-coding region of the target gene mRNA to regulate gene expression after transcription. The expression level of miRNA is closely related to the clinical staging, typing, prognosis assessment, and therapeutic effect of DLBCL. miRNA has a great potential as that of DLBCL-related biomarkers, and because of the close link between the two, miRNA-based therapies are expected to lead to new treatment options for DLBCL patients.
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Objective:To investigate the molecular epidemiological characteristics and antibiotic resistance of Clostridioides difficile ( Cd) in hospitalized diarrhea patients in a tertiary hospital in Shaanxi Province. Methods:This study collected 425 stool samples of hospitalized diarrhea patients from October 2018 to December 2021 for isolation and identification of Cd. Toxin genes carried by the isolates were detected. Multilocus sequence typing (MLST) was performed to analyze the phylogenetic profile. Antibiotic susceptibility was analyzed by E-test. Results:Forty-nine strains of Cd were isolated from the 425 samples, including 37 strains of toxigenic Cd (75.5%, 37/49). The detection rate of Cd was 14.0% (25/179) in diarrhea patients aged ≥65 years old and 36.4% (4/11) in Nephrology Department. In the 37 toxigenic Cd strains, A -B + CDT -Cd, A + B + CDT -Cd and A + B + CDT +Cd accounted for 18.9% (7/37), 78.4% (29/37) and 2.7% (1/37), respectively. There were 24 ST types, among which ST2, ST3 and ST54 were the predominant types, each accounting for 12.2% (6/49). All strains were sensitive to metronidazole and vancomycin, with a high resistance rate of 93.9% (46/49) to ciprofloxacin and a low resistance rate of 12.2% (6/49) and 10.2% (5/49) to rifampicin and meropenem, respectively. Conclusions:The main type of toxigenic strains was A + B + CDT -. ST2, ST3 and ST54 were the predominant types and the distribution of ST types was scattered. All isolates were sensitive to metronidazole and vancomycin and most of them were resistant to ciprofloxacin.
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Objective:To determine the molecular characteristics of Streptococcus suis type 2 (SS2) in Zhejiang Province. Methods:Twenty-nine SS2 sporadic human isolates in Zhejiang Province from Januery 2005 to July 2021 were genotyped by pulsed-field gel electrophoresis (PFGE), multilocus sequence typing (MLST), and minimum core genome (MCG) sequence typing.Results:Among 29 strains, 10 PFGE patterns and three main clusters were obtained by PFGE. Twenty-one (72.41%) of the strains were divided into two main branch groups and the remaining eight (27.59%) showed genetic diversity with the similarity ranging from 49.7% to 94.7%. Three sequence types were obtained from 29 strains by MLST, including ST7 (86.21%(25/29)), ST1 (10.34%(3/29)) and ST25 (3.45%(1/29)). In addition, three genotypes were obtained from 29 strains by MCG, including genotype E (41.38%(12/29)), genotype group 1 (55.17%(16/29)) and genotype group 4 (3.45%(1/29)).Conclusions:Two large clonal groups of highly pathogenic strains of SS2 have been prevalent in Zhejiang Province. A few strains display genetic diversity, indicating genetic variation may exist during transmission.
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Objective To analyze the expression of KCNJ11 mRNA in gliomas and its prognostic value. Methods The clinical, histopathological and molecular pathological features of 273 patients with gliomas were collected from CGGA. We analyzed the differences of KCNJ11 mRNA expression in different types of gliomas and the survival time of patients with high and low expression of KCNJ11 mRNA in different subtypes of gliomas. Results The expression levels of KCNJ11 mRNA in young glioma and primary glioma patients were higher than those in old glioma and recurrent glioma patients, respectively (P=0.008, 0.001). The expression of KCNJ11 mRNA in oligodendroglioma was the highest, astrocytoma was the second, and glioblastoma was the lowest (P=0.000). The expression of KCNJ11 mRNA in WHOⅡ grade glioma was the highest, WHOⅢ was the second, and WHOⅣ was the lowest (P=0.000). The expression levels of KCNJ11 mRNA in IDH-mutant type glioma patients were higher than those in IDH-wild type glioma patients (P=0.000). The expression of KCNJ11 mRNA in deletion of 1p/19q glioma patients was higher than that in non-deletion of 1p/19q ones (P=0.000). The expression of KCNJ11 mRNA in MGMT methylated glioma patients was higher than that in non-methylated ones (P=0.036). The survival time of patients with high expression of KCNJ11 mRNA (≥2.77) was longer than that with low expression (P=0.000). Multivariate Cox analysis showed that the high expression of KCNJ11 mRNA was an independent factor affecting the good prognosis of patients with glioma. Conclusion The expression of KCNJ11 mRNA is negatively related to the malignant degree of the tumor. The high expression of KCNJ11 mRNA is an independent factor affecting the good prognosis of patients with glioma.
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Abstract Listeria monocytogenes is responsible for causing listeriosis, a type of food poisoning with high mortality. This bacterium is mainly transmitted to humans through the consumption of contaminated foods. Detection of L. monocytogenes through molecular methods is crucial for food safety and clinical diagnosis. Present techniques are characterized by low discrimination power and high cost, as well as being time-consuming and taking several days to give the final result. In our study, MLVA-HRM (Multiple-Locus Variable-number tandem repeats Analysis ‒ High-Resolution Melting) was investigated as an alternative method for a fast and precise method for the genotyping of L. monocytogenes isolates. Forty-eight isolates of L. monocytogenes obtained from the microbial bank of Department of Microbiology, Iran University of Medical Sciences, were typed by MLVA-HRM analysis using five Variable Numbers of Tandem Repeat (VNTR) loci. A total of 43 different types were obtained. This research demonstrated the usefulness of the MLVA-HRMA method and its ability to discriminate L. monocytogenes isolates. Since this method is easier and more efficient than existing methods, it can be widely used in food processing plants and diagnostic laboratories as a fast and accurate method.
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Endometrial cancer has been identified by The Cancer Genome Atlas program with four molecular subtypes by genome sequence analysis. Clinical trials to select suitable immunotherapeutic agents based on the different immune characteristics of each subtype have been conducted in several countries and have made important progress. The main clinical applications of immune checkpoint inhibitors include anti-programmed cell death protein-1/programmed death-ligand 1 antibodies and poly ADP-ribose polymerase inhibitors. Optimizing drug selection and drug combination based on the target characteristics of different immune checkpoint inhibitors may provide new opportunities for immunotherapy of endometrial cancer and bring new light to improve survival rates.
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Molecular typing of leukemia is the basis of risk assessment and treatment options. NUTM1 gene (15q14) rearrangement is a novel molecular type of acute B lymphoblastic leukemia (B-ALL), which is mainly found in children (≥1 year old) and infants (< 1 year old). The number of patients is slightly more in children than infants. However, in infantile ALL, NUTM1 rearrangement is the second most common molecular abnormality. These children respond well to conventional chemotherapy regimens and with a good prognosis. The number of leukemia patients with NUTM1 gene rearrangement is still small, and there is no relevant study or case report in China. NUT protein encoded by NUTM1 gene is a chromatin regulator, which is related to histone acetylation regulation and chromatin remodeling. This article aims to introduce the clinicopathological features, detection methods, possible tumorigenic mechanisms and therapeutic prospects of leukemia with NUTM1 gene rearrangement, to increase the understanding of this type of leukemia and provide reference for the precise molecular subtyping and treatment.
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Objective:Analysis of the antibiotic resistance profiles and molecular typing of Salmonella typhimurium ( S. typhimurium) isolated in Wuxi city from 2011 to 2018. Methods:A total of 109 S. typhimurium isolates were detected from different types monitoring samples in Wuxi city from 2011 to 2018. Microbroth dilution method was used to test antimicrobial susceptibility of S. typhimurium for 17 antimicrobial agents. Pulsed field gel electrophoresis (PFGE) was used to conduct molecular typing. Statistical analysis was carried out using Chi-square test. Results:Tetracycline-resistance and ampicillin-resistance were most frequency in 109 S. typhimurium isolates, 69.72% (76/109) and 68.81% (75/109), respectively. For compound sulfamethoxazole, chloramphenicol, ciprofloxacin, ampicillin/sulbactam, azithromycin, nitrofurantoin, cefotaxime and aztreonam, the resistance rates were 23.85%(26/109), 22.02%(24/109), 11.93%(13/109), 4.59%(5/109), 3.67%(4/109), 3.67%(4/109), 0.92%(1/109), 0.92%(1/109), respectively. All isolates were susceptible to amikacin, ertapenem, imipenem, meropenem, ceftazidime and ceftazidime-avibactam. Azithromycin-resistance isolates were decreasing year by year gradually. The aztreonam and cefotaxime-resistant isolates were found since 2018, while chloramphenicol and compound sulfa-resistant isolates showed upward trend simultaneously. Conclusions:S. typhimurium in Wuxi city exhibited highly resistant to tetracycline and ampicillin. The significant variability existed between genotype and phenotype of S. typhimurium.
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ObjectiveTo determine the pathogenic cause in a foodborne diseases outbreak of Salmonella enteritidis in a company in Suzhou City， and provide evidence for epidemiological investigation and guidance for clinical treatment. MethodsRelevant specimens were examined for Salmonella， Shigella， Staphylococcus aureus and Vibrio parahaemolyticus. Furthermore， for the isolated Salmonella enteritidis， a micro broth dilution method was used for antimicrobial susceptibility testing， and pulsed field gel electrophoresis （PFGE） was used for molecular typing. ResultsA total of 44 strains of Salmonella enteritidis were detected from 43 anal swabs of the patients in the outbreak， 7 anal swabs of canteen employees， 31 retained food specimens and 6 environmental specimens. A total of 15 antimicrobial susceptibility testings showed that the 44 strains had the same antimicrobial resistance spectrum， which was 100% resistant to cefazolin， ampicillin， ampicillin/sulbactam， polymyxin E and nalidixic acid， suggesting a multi-drug resistance to more than three antibiotics. PFGE cluster analysis showed that the 44 strains had a 100% of genetic similarity. ConclusionThe outbreak is caused by the consumption of food contaminated with Salmonella enteritidis. The isolated strains have multi-drug resistance， which could guide appropriate antimicrobial treatment based on the antimicrobial susceptibility testing.
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Resumen Introducción: La resistencia a carbapenémicos mediada por carbapenemasas en Pseudomonas aeruginosa es un mecanismo importante; sin embargo, la pérdida de la porina OprD continúa siendo el mecanismo más frecuente. Objetivo: Determinar la proporción de aislados de P. aeruginosa, resistentes a imipenem y/o meropenem, productores de carbapenemasas, el tipo de enzima producida y la relación genética entre los aislados. Material y Métodos: Se incluyó 113 aislados resistentes al menos a un carbapenémico, provenientes de 12 hospitales de 9 ciudades de Chile. Adicionalmente se determinó la susceptibilidad a ceftazidima, amikacina, gentamicina, piperacilina/tazobactam, ciprofloxacina y colistina. Se realizó Carba NP y en los aislados positivos (n: 61) se detectó genes de carbapenemasas por RPC. Los aislados fueron tipificados por restricción con SpeI y PFGE. Resultados: No todos los aislados presentan carbapenemasas, y sólo en 61/113 de ellos (54%) se amplificó blaKPC (32) o blaVIM (29). En ninguno de los aislados se encontró co-portación de ambos genes. Los pulsotipos indican que no hay diseminación clonal de los aislados, evidenciando una importante diversidad genética. Conclusiones: Los aislados de P. aeruginosa productores de carbapenemasas, obtenidos en hospitales de Chile, portan genes blaKPC y blaVIM y, en su mayoría, son policlonales. Estos resultados ponen énfasis en la importancia de realizar estudios epidemiológicos con mayor número de aislados que permitan conocer mejor la epidemiología de P. aeruginosa productoras de carbapenemasas en Chile.
Abstract Background: Carbapenem resistance mediated by carbapenemases in Pseudomonas aeruginosa is an important mechanism; however, loss of porin OprD remains as the most frequent. Aim: To determine the proportion of P. aeruginosa isolates, resistant to imipenem and/or meropenem, producing carbapenemases, the type of enzyme produced and the genetic relationship between the isolates. Methods: One hundred and thirteen resistant to at least one carbapenem isolates, obtained in 12 hospitals and 9 cities in Chile were studied. Additionally, susceptibility to ceftazidime, amikacin, gentamicin, piperacillin/tazobactam, ciprofloxacin and colistin was determined. Carba NP was performed and in the positive isolates carbapenemase genes were detected by PCR. The isolates were typified by restriction with SpeI and PFGE. Results: Not all isolates produce carbapenemases, and only in 61/113 of them (54%) the blaKPC (32) or blaVIM (29) was amplified. In none of the isolates was found the coharboring of both genes. The pulsotypes indicated no clonal dissemination of the isolates, evidencing an important genetic diversity. Conclusions: P. aeruginosa isolates producing carbapenemases, obtained in Chilean hospitals carry blaKPC and blaVIM genes and, mostly, are polyclonal. These results emphasize the importance of carrying out epidemiological studies with a greater number of isolates to allow a better understanding of the epidemiology of carbapenemase-producing P. aeruginosa in Chile.
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Humans , Pseudomonas aeruginosa , Pseudomonas Infections , Pseudomonas aeruginosa/genetics , Bacterial Proteins/genetics , beta-Lactamases/genetics , Microbial Sensitivity Tests , Carbapenems/pharmacology , Chile , Hospitals , Anti-Bacterial Agents/pharmacologyABSTRACT
Objective:To explore the association of molecular subtypes with local recurrence, distant metastasis and prognosis in breast cancer patients undergoing adjuvant therapy after modified radical mastectomy as well as its significance.Methods:The clinical data of 108 patients with breast cancer undergoing adjuvant therapy after modified radical operation in the First Affiliated Hospital of Xi'an Jiaotong University from March 2002 to March 2012 were retrospectively analyzed. According to the expressions of estrogen receptor (ER), progesterone receptor (PR) and human epidermal growth factor receptor-2 (HER2), patients with breast cancer were divided into 4 molecular subtypes, including Luminal A, Luminal B, HER2-positive and triple-negative. The relationship between clinicopathological factors and molecular subtypes was analyzed, and the local recurrence rate and distant metastasis rate of breast cancer patients with various molecular subtypes were compared. Kaplan-Meier method and log-rank test were used to make single factor analysis of survival. Cox proportional hazard model was used to make multi-factor survival analysis.Results:Among 108 patients, 41 cases were Luminal A, 40 cases were Luminal B, 17 cases were HER2-positive and 10 cases were triple-negative. The differences in compositions of patients with age, tumor size, pathological type, lymph node metastasis, American Joint Committee on Cancer (AJCC) staging, vascular tumor thrombus, resection margin, and chemotherapy cycle number among groups with 4 molecular subtypes were not statistically significant (all P > 0.05), while the difference in compositions of patients receiving endocrine therapy was statistically significant ( P < 0.01). The local recurrence rate of patients with Luminal A, Luminal B, HER2 positive and triple-negative was 14.6% (6/41),15.0% (6/40), 11.8% (2/17), 10.0% (1/10), respectively, and the difference was not statistically significant ( P > 0.05). The distant metastasis rate of patients with HER2-positive and triple-negative was 35.3% (6/17) and 40% (4/10), respectively, which was higher than that of patients with Luminal A [24.4% (10/41)] and Luminal B [22.5% (9/40)], but there was no statistically significant difference among the four types ( P > 0.05). Kaplan-Meier analysis showed there was no statistical difference in progression-free survival of patients with Luminal A, Luminal B, HER2-positive and triple-negative ( P > 0.05), while there was a statistical difference in the overall survival (OS) ( P = 0.047), and the OS of triple-negative patients was the worst, meanwhile AJCC staging, lymph node metastasis and endocrine therapy were associated with the OS (all P < 0.05). Multi-factor Cox proportional hazard model analysis showed that lymph node metastasis ( OR = 4.481, 95% CI 1.377-14.580, P = 0.013) and endocrine therapy ( OR = 0.165, 95% CI 0.034-0.800, P = 0.025) were independent prognostic factors affecting OS. Conclusions:There is no statistically significant difference in local recurrence rate for breast cancer patients with different molecular types undergoing adjuvant therapy after modified radical mastectomy. Breast cancer patients with Luminal have better OS, while those with triple-negative have the worst OS. Molecular subtypes may have an important significance for the treatment choice and prognosis judgement of breast cancer.
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Objective:To analyze the serology and molecular typing of Listeriamonocytogenes isolated from patients in Henan, and to explore the epidemic situation of listeriosis, construct the molecular traceability database of patient isolates, so as to provide laboratory basis for listeriosis traceability. Methods:From January 2015 to July 2020, 71 positive Listeriamonocytogenes cases were monitored in 16 sentinel hospitals in Henan. Eighty samples of positive cases were collected for detection, and 71 positive strains were obtained for molecular typing. According to the Entry-exit Inspection and Quarantine Industry Standard of China (SN/T 2521-2010) and the instructions for the use of diagnostic serum of Listeriamonocytogenes, 80 strains of Listeriamonocytogenes were serotyped, and PFGE cluster analysis was performed according to the User Manual of National Foodborne Disease Molecular Traceability Network. Results:A total of 71 positive listeriosis cases were detected, of which 38 cases were perinatal cases and 33 cases were non-perinatal cases. Among the 80 positive cases of listeriosis, 58.75% (47/80) were from perinatal cases, 20.00% (16/80) were from non-perinatal cases with underlying diseases, the proportion of>1 month-≤5 years old,>5-≤60 years old and >60 years old was 7.50% (6/80), 12.50% (10/80) and 1.25% (1/80), respectively, in non-perinatal age group. There were 5 types of specimens, 73.75% (59/80) were blood, 15.00% (12/80) were cerebrospinal fluid, and 3.75% (3/80) were stool, intrauterine swab and sputum. 80 strains of Listeriamonocytogenes were classified into three serotypes, Type 1/2b, Type 1/2a and Type 4b accounted for 61.25% (49/80), 35.00% (28/80) and 3.75% (3/80) respectively. The 71 strains of Listeriamonocytogenes were digested by AscⅠ, and 58 bands were obtained. Each band type included 1-4 strains, and the similarity was 60.8%-100%. GX6A16HA0005, GX6A16HA0011, GX6A16HA0030, GX6A16HA0023, GX6A16HA0029 and GX6A16HA0054 were dominant bands, including 4, 4, 4, 3, 2 and 2 strains respectively. Four strains of GX6A16HA0005 from 2016, 2018 and 2020 were isolated. One strain from 2016 and one strain from 2018 were from Puyang City. Four strains of GX6A16HA0011 were isolated from samples of 2016, 2018 and 2020, including two strains of 2020 from Luoyang City. Four strains of GX6A16HA0030 were isolated from 2018 samples from Luoyang City, Shangqiu City and Zhengzhou City, respectively. Three strains of GX6A16HA0023 were isolated from 2017 and 2018 samples, of which one strain from 2017 and one strain from 2018 were from Luoyang City. Two strains of GX6A16HA0029 were isolated from 2018 samples, from Kaifeng City and Puyang City respectively. Two strains of GX6A16HA0054 were isolated from 2020 from Pingdingshan City and Anyang City, respectively. The PFGE patterns of 4 strains with different serotypes were the same. Conclusion:Listeriosis cases in Henan are mainly found in patients during the perinatal period, and in elderly, new-born, and low immunity population. The infection type is mainly invasive infection; the serotypes of epidemic strains are 1/2a, 1/2b and 4b, and the results of PFGE typing of strains are diverse. There is a consistent phenomenon of cross-year or different regions in the same year, different time zones in the same year and the same region; phenotyping and genotyping or different genotyping techniques should be combined in the traceability analysis.
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Diffuse large B-cell lymphoma (DLBCL) is the most common non-Hodgkin lymphoma, with high clinical and biological heterogeneity. Only 60% of patients can benefit from standard immunochemotherapy. Looking for new clinical parameters and biomarkers to better classify and stratify the prognosis of DLBCL patients has been the focused area in recent years. This article reviews the classifications and their prognostic significances of DLBCL by analyzing the related studies of genome and transcriptome.
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Intrahepatic cholangiocarcinoma (ICC) has a high degree malignancy, and its incidence has gradually increased in recent years. Surgery is still the only curative treatment for ICC to achieve long-term survival, but its onset is hidden, and most patients have lost the opportunity of operation when they are diagnosed. ICC shows significant heterogeneity. With the development of the second generation sequencing technology, the tumor patterns of ICC, such as DNA, RNA, epigenetic, protein, microenvironment and so on, have been gradually discovered. The purpose of this article is to review the research progress of molecular typing and clinical application of ICC in recent years.
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Objective:To determine the distribution and epidemic characteristics of Vibrio parahaemolyticus in Jinshan District of Shanghai from 2016 through 2018. Methods:Serotype analysis，examination of virulence genes， including thermolabilehemolysin（TLH），thermostable direct hemolysin（TDH），and TDH related hemolysin（TRH），and antimicrobial susceptibility test and pulsed field gel electrophoresis （PFGE） molecular typing were performed on 218 Vibrio parahaemolyticus isolated from diarrhea patients. Results:A total of 218 strains were divided into 8 groups and 21 serotypes. Of them， 147 strains were serotyped，with O3：K6 as the most common serotype （57.3%）. All tested strains were divided into 25 clusters based on the similarity of 85% and above，in which the dominant cluster was JSVP02，and the total similarity was 56.3%-100.0%. Two hundred and one strains （92.2%） carried tdh gene，13 strains （6.0%） carried trh gene，and 7 strains were negative for both tdh and trh. A total of 35 strains were completely sensitive to 17 kinds of antibiotics，while the remaining 183 strains showed different drug resistance. Conclusion:Vibrio parahaemolyticus isolated from diarrhea patients in Jinshan District from 2016 through 2018 is diverse. Majority of the strains have TDH gene and are resistant to the first generation cephalosporins such as cefazolin and penicillin ampicillin. Construction of regional PFGE molecular typing database will facilitate screening，identification and early warning of high-risk strains.