OBJECTIVE To determine the association between phenotype and genotype of biofilm in Staphylococcus.METHODS All 156 clinical isolates of coagulase negative Staphylococcus(CNS) and 90 S.aureus(SAU) strains isolating from clinical specimens from Mar 2005 to Jul 2008,as well as 12 CNS strains from nasal swabs of healthy carriers from hospital staff,were collected.Congo red technique was performed to examine slime production.The presence of the intercellular adhesion genes(icaA and icaD) was determined by the polymerase chain reaction method.The phenotype and genotype of biofilm were analyzed.RESULTS Thirty-two out of 168 CNS isolates were biofilm producers(19.0%) while 32 out of 90 SAU isolates were producers(35.6%).All strains positive for icaA positive were also positive for icaD.The 16 strains(10 CNS isolates and 6 SAU isolates) were icaA and icaD positive but do not produced slime.CONCLUSIONS For SAU,the percentage of slime-production strains(35.6%) is higher than that found in CNS(19.0%).The characteristic of biofilm-negative variants having the ica loci might contribute to the dissemination.For clinical isolates of S.epidermidis,ica locus may not be a significant marker discriminating between invasive and contaminating isolates.

ObjectiveTo evaluate combined pneumatic lithotripsy and vacuum suction during ureterorenoscopy.MethodsCombined pneumatic lithotripsy and vacuum suction during ureterorenoscopy was conducted for 52 cases of urolithiasis with the average age of the patients 36 years old.There were 3 cases of renal stone,9 upper ureteral stone,12 middle ureteral and 28 lower ureteral stone.The average surface area of the stones was 79 mm2.ResultsThe average operation time was 31 min and the fragmentation in situ 100.0%.The stone upward displacement rate was 1.7%.Fragmentation of the stone has been incomplete in 2 cases and ESWL was instituted.49 patients have been followed up for 1～3 months and the stone clearance rate was 96.0%.ConclusionsThe procedure would reduce the high instillation pressure which might cause upward displacement of the stone and liquid reflux to the renal parenchyma.The vacuum pressure set to -0.2～-0.4 bar is the most ideal.

OBJECTIVE To investigate the changing pattern of clinical pathogens and the antibiotic resistance.METHODS The statistics of MRSA and MSSA isolated clinically in Hubei Province during from 2002 to 2005 was collected and analyzed.RESULTS The resistance rate of MRSA to various antibiotics was higher than that of MSSA.The resistance rate of MRSA to tetracyclines decreased yearly.CONCLUSIONS Multidrug resistance of MRSA to the most antibiotics is not improving.Vancomycin possesses the strongest activity for MRSA.However,the resistance of MSSA to the most antibiotics is improving.

Objective To investigate the effect of Budesonide combined with Salbutamol in treatment of chil-dren with bronchial asthma.Methods 100 cases of children with asthma were randomly divided into conventional therapy group(Group A)50 cases and combined treatment group(Group B)50 cases;Conventional therapy was given to group B and Group A Was givend the conventional therapy puls Budesonide combined with salbutamol treatment,2 times a day.The course of treatment was 10d;The effect of clinical symptom score、clinical recovery and adverse reac-tions in two groups were observed.Results The total efficiency of 47 cases(94.O%) in group A were significantly higher than the B group 36 cases(72.0%)(P<0.05);The index of breathing diffculties、coushing、wheezing、wheezing sustain and sleep satisfaction after treatment were significantly decreased compared with before treatment in two groups(all P<0.01);The time of recovery of breath shortness、cough、asthma、wheezing and therapy hys in group A were less than group B(all P<0.05).Condusion Atomizing inhalation treatment of Bedesonide combined with Sallbutamol was effective to treat children with bronchial asthma.

OBJECTIVE To investigate the infection status and drug resistance of Mycoplasma strains isolated from genitourinary tract. METHODS The IST kit produced by Bio-Merieux was used to culture the Mycoplasma strains and to do drug susceptibility test. RESULTS The Mycoplasma infection ratio was 41.0%,with Ureaplasma urealyticum(Uu) 71.9%,Mycoplasma hominis(Mh) 2.3%,and mixed infection 25.8%,respectively.The drug susceptibility test showed that drug resistance ratios were as follows: to erythromycin 58.7%,ciprofloxacin 50.0%,ofloxacin 41.3%,pristinamycin 3.3%,josamycin 5.4% and doxycycline 7.6%. CONCLUSIONS Mycoplasma infection in genitourinary tract is mainly due to Uu infection.We should rationally choose and use antibiotics according to the drug susceptibility,and josamycin is very effective.

Objective To investigate the parameters of liver tissue in SD rats and beagle dogs and to supply evidence for toxicologic pathological evaluation.Methods Forty SD rats and twenty beagle dogs,male in half,were used for the observation.SD rats were sacrificed at the age of 12 weeks and the beagles at the age of 12 months.After complete necropsy examination,all livers were fixed in 10 % neutral buffered formalin solution,embedded in paraffin,sliced at a thickness of 5 ? m and stained with hematoxylin and eosin(HE).The distance of central vein and portal area,and that of central veins in the neighbored lobules were measured by means of an image analyzer Spot Advanced.The difference of the above distance between beagles and rats,and that between male and female were compared.Results The distance of central veins in the neighbored lobules was about 883 ? m in the beagles and about 496 ? m in SD rats,and the distance between lobule center and portal area was about 511 ? m in beagle dogs and about 410 ? m in SD rats.There was no difference between the male and the female.Conclusion The distance of central veins in the neighbored lobules in beagle dogs is longer than that in SD rats,so does the distance between lobule center and portal area.The sex of the animal has no influnce on the size of the lobules.

To establish kinetic assay method for the analysis of hemolysis and to investigate dynamic hemolytic process of polysorbate 80. The UV-VIS spectrum of heme changes when hemoglobin is released continuously during the hemolytic process. Therefore, dynamic hemolytic curve was determined as a new way to characterize the kinetic process of interaction between polysorbate 80 and red blood cells. The effect of polysorbate 80 on blood cells could be perfectly investigated by the hemolytic dynamics. Dynamic hemolytic parameters of polysorbate 80 were calculated according to the hemolytic curves. The constants of hemolytic rate and maximum hemolytic rate of polysorbate 80 had fine linear relationships at the range of 1-20 mg x mL(-1) and 5-20 mg x mL(-1), respectively. In comparison with the present official method such as macroscopic observation and static spectrophotometric methods, kinetic spectrophotometry has the advantages of real time, on-line determination, sensitive, objective, good reproducibility and 2-dimensional information acquired. Therefore, as a biological technique, kinetic spectrophotometry could be applied to evaluate the quality of polysorbate 80 and to screen other solubilizing excipients.

Objective To compare the safety and efficacy of direct and remedial rotational atherectomy in the treatment of heavily calcified coronary artery lesions.Methods We retrospectively reviewed 58 patients admitted in the Shanghai Chest Hospital and Liaocheng People Hospital from May 2012 to July 2015 who had received stent implantation and rotational atherectomy.The 58 patients were divided into two groups which were the direct atherectomy group (n =27) and the remedial atherectomy group (n =31).General clinical date,lesion and procedural characteristics,intraoperative complications,in-hospital and follow-up MACCE were compared between the two groups.Results There were no differences between the two groups in general clinical date intraoperative complications,amount of contrast agent used,proceduraltime,rates of in-hospital and follow-up MACCE.Nevertheless,compared with the direct artherectomy group,the remedial group had more number of balloon dilations during procedure [3 (1,5) vs.2 (1,2),P ＜ 0.001] and higher peak cardiac troponin levels [1.1 (0.3,3.0) μg/L vs.0.5 (0.1,2.3) μg/L,P =0.032].Conclusions Remedial rotational atherectomy with drug-eluting stent had the same safety and efficacy as direct atheretomy with drug-eluting stent in treating patients with heavily calcified coronary lesions.It is reasonable and safe to transform routine PCI to remedial rotational atherectomy when the 2.0 mm semi compliant balloon or/and 2.5 mm non-compliant balloon cannot pass through or dilate the lesions.

Purpose To explore the value of deep learning ultrasound radiomics nomogram in assessing the biological characteristics of invasive metastases in invasive breast cancer.Materials and Methods A retrospective collection of ultrasound imaging data from 180 pathologically confirmed invasive breast cancer between January 2021 to December 2022 in Maoming People's Hospital was conducted,with pathological reports indicating the status of lymph node metastasis(LNM),lymphovascular space invasion(LVSI)or perineural invasion(PNI),according to the LNM/LVSI/PNI status,the three indexes were divided into the training cohort and the verification cohort by 8∶2.Based on Pyradiomics and ResNet50 deep learning extractor,1 316 radiomic features and 2 048 deep learning features were extracted,respectively.The random forest machine learning algorithm was employed to develop evaluation models,and the model scores were calculated.The deep learning radiomics nomograms were developed based on the radiomic and deep learning model scores.The receiver operating characteristic curve was used to assess the performance of the models.The Delong test was applied to analyze the performance differences between different models.Results In the evaluation of LNM,LVSI and PNI status,the area under the curve of all the nomogram in the cohorts demonstrated moderate or above assessment performance(≥0.73),with accuracies all greater than 0.70.Specifically,in the LNM evaluation,the area under the curve of the training cohort was 0.97,the accuracy was 0.93,the sensitivity was 0.88 and the specificity was 0.96.Through the Delong test,the assessment performance of the nomograms was superior to the radiomics models(LNM,Z=2.04,P=0.04;LVSI,Z=2.80,P=0.01;PNI,Z=3.52,P<0.01),and was superior to or similar to the deep learning models(LNM,Z=4.52,P<0.01;LVSI,Z=1.86,P=0.06;PNI,Z=0.31,P=0.76)in the training cohort.Conclusion The deep learning radiomics nomogram can effectively evaluate the biological characteristics of invasion and metastasis in invasive breast cancer.The nomogram improves the assessment performance by integrating the radiomic and deep learning feature information.

Objective:To investigate the role of DNA damage and repair inhibition in the effect of ginkgo biloba on liver injury in patients with coal-burning-borne arsenism.Methods:In March 2017, the investigation was conducted in Jiaole village arsenic poisoning area in Yuzhang Town, Xingren County, Guizhou Province. According to the "Diagnosis of Endemic Arsenicosis" (WS/T 211-2015) and the "Diagnostic Criteria of Occupational Toxic Hepatopathy" (GBZ 59-2010), 52 patients with arsenism were selected as the ginkgo biloba intervention group, and 49 cases of arsenism patients as intervention control group. Ginkgo biloba tablets were given orally for 3 months (1 tablet/time, 3 times/d) according to the commonly used clinical methods, and no other drugs were given to all subjects during the intervention period. The intervention control group was given placebo in the same way as that of ginkgo biloba intervention group. A total of 41 residents who did not burn high arsenic coal 12 km away with no abnormal liver function were selected as normal control group. Physical examinations were performed before the intervention and at the end of the intervention at 3 months. After receiving signed informed consent, morning urine and peripheral venous blood samples were collected to detect urinary arsenic content by inductively coupled plasma mass spectrometry (ICP-MS); liver function biochemical indexes [albumin (ALB), albumin/globulin (A/G), cholinesterase (CHE), total bile acid (TBA)] were determined by automatic biochemical analyzer, DNA damage by single-cell gel electrophoresis assay, and the expression of miR-145 (repair inhibition index) by qRT-PCR.Results:There were 116 subjects, 41 in normal control group, 39 in ginkgo biloba intervention group and 36 in intervention control group. In ginkgo biloba and intervention and intervention control groups, there was no significant difference in age, gender, smoking habits and drinking compared with normal control group ( P > 0.05). Urinary arsenic content, TBA level, DNA damage degree [comet tail DNA percentage (TailDNA%) and olive tail moment (OTM)] and plasma miR-145 expression level [(38.75 ± 19.09) μg/g Cr, (11.13 ± 1.55) μmol/L, 8.50 ± 0.88, 7.43 ± 0.68, 5.78 ± 0.75, respectively] in ginkgo biloba intervention group patients before intervention were higher than those in normal control group [(11.62 ± 5.33) μg/g Cr, (5.36 ± 0.87) μmol/L, 5.24 ± 0.33, 4.71 ± 0.29, 2.05 ± 0.27, respectively], the differences were statistically significant ( P < 0.05); the levels of ALB, A/G and CHE were significantly lower than those in normal control group ( P < 0.05). After the intervention of ginkgo biloba, urinary arsenic content, TBA level, DNA damage degree (TailDNA% and OTM) and plasma miR-145 expression level in patients were significantly lower than those before the intervention ( P < 0.05); the levels of ALB, A/G and CHE were significantly higher than those before the intervention ( P < 0.05). There was no significant difference in the above indexes before and after intervention in the intervention control group ( P > 0.05). The results of correlation analysis between DNA damage degree, miR-145 and liver function indexes after the intervention of ginkgo biloba showed that, DNA damage degree (TailDNA% and OTM) was negatively correlated with the levels of ALB, A/G and CHE ( r = - 0.34, - 0.33, - 0.48, - 0.31, - 0.31, - 0.42, P < 0.05), and positively correlated with the level of TBA ( r = 0.49, 0.48, P < 0.05); miR-145 was negatively correlated with the levels of ALB, A/G and CHE ( r = - 0.26, - 0.23, - 0.38, P < 0.05), which was positively correlated with the level of TBA ( r = 0.32, P < 0.05); and DNA damage degree was positively correlated with the expression of miR-145 ( r = 0.65, 0.52, P < 0.05). Conclusion:Ginkgo biloba tablets can alleviate the liver damage caused by arsenic through coal burning, and the mechanism of this process is related to its inhibition of miR-145 expression and reduction of DNA damage.