Sepsis in premature is a major cause of morbidity and mortality.The definition of neonatal sepsis is complicated by the frequent presence of noninfectious conditions that resemble those of sepsis,especially in very low-birth-weight preterm infants.Although growth of an organism from a sterile site is the gold standard for definitive diagnosis,the positive rate is low.Therefore,assessment of history,risk factors,sepsis screening scores in combination with diagnostic tests are used to identify neonates who are more likely to be infected.Methods studied to prevent infection include improved hand hygiene,early feedings,immune globulin administration,prophylactic antimicrobial administration.It improves prognosis for early diagnosis and antibiotic administration.

Phylogenetic markers are the gene fragments that demonstrate the gene tic relationships between organisms To differentiate close taxa, many new phyl oge n etic markers were used, with which the polyphasic taxonomy was enriched This a r ticle chiefly described the characters of several phylogenetic markers and their applications in the studies of the phylogenetics of bacteria

It is well known that pulmonary hypertension(PH) is one severe complication of bron-chopulmonary dysplasia( BPD) that is associated with high mortality. Aberrant pulmonary vascular growth, abnormal vasoreactivity and pulmonary vascular remodeling may ultimately lead to PH. Symptoms of PH of-ten overlap those of BPD itself. Furthermore,the emergence of symptoms may indicate that the disease has already progressed to a late, less reversible phase, thereby supporting arguments for screening all infants at risk. Echocardiography is non-invasive and widely available,and is currently the most commonly used screen-ing modality for PH in infants with BPD. Because the incidence of associated cardiovascular anomalies is high,cardiac catheterization and CT scanning of the chest should be considered in all infants who have signifi-cant PH despite optimal management of their lung disease. Early diagnosis and aggressive specific drug thera-py can improve the outcome for these patients.

Objective To discuss the application of breast surgery with radical surgery in the therapeutic effect and complications in patients with early breast cancer.Methods 110 early breast cancer patients with surgical treatment were randomly divided into two groups,each group in 55 cases,the control group was given radical surgical treatment,the observation group was given breast conserving operation,surgery were recorded in patients of the two groups.Results The results of the observation group showed operative incision length (4.02 ±1.15)cm,operation time (58.93 ±13.25)min,intraoperative blood loss (10.11 ±2.87)mLand length of hospital stay (10.74 ±2.17)d. The datas of control group showed surgical incision length (11.87 ±2.44)cm,operation time (95.72 ±26.78)min, intraoperative blood loss (85.27 ±14.28)mL and length of hospital stay (15.86 ±4.43)d,the differences were statistically significant (t =21.582,9.131,5.714,7.697,all P <0.05).Observation group occurred postoperative hand infection in 1 case,upper extremity edema in 2 cases,and no subcutaneous hemorrhage occurs.Control group had 6 cases of postoperative hand infection,10 cases of upper limb edema,and subcutaneous hemorrhage in 5 cases,the differences were statistically significant (χ2 =4.852,5.986,5.238,all P <0.05).3 months after operation,datas of observation group showed physiological state (54.18 ±6.28)points,psychological state (59.27 ±5.82)points,environmental conditions (68.45 ±7.68)points and social function (57.46 ±5.97)points.Physiological state of the control group after 3 month was (65.69 ±9.11)points,while psychological state was (68.31 ±7.33)points,environmental conditions was (78.17 ±10.54)points,social function was (68.77 ±7.15)points,the differences were statistically significant (t =7.714,7.163,5.527,9.004,all P <0.05).Conclusion Breast surgery application in patients with early breast cancer can shorten the operation time,reduce intraoperative bleeding and flow rate,shorten the length of hospital stay, reduce complications and improve postoperative quality of life,it is worth popularizing in clinical application.

Objective To explore the influence on college students' contrast sensitivity how dual N-back working memory training task based on Gabor,and to provide new training method for improving the contrast sensitivity.Methods 42 college students were randomly divided into three groups:a control group (17 students) ; a working memory training group (13 students) ; and a Gabor orientation training group (12 students).The control group received no training,while the working memory training group and the Gabor orientation training group received N-back working memory training and Gabor training,respectively,over three weeks (5 days a week,approx.half an hour per day).The above-mentioned two training methods performed with the same visual stimulus,i.e.,the Gabor patch with a fixed spatial frequency and contrast.The contrast sensitivity of the 42 students was measured and recorded using OPTEC6500 before and after training.Results In the working memory training group,a salient gain in contrast sensitivity was observed after the training (before:(1.48 ± 0.26) log,after:(1.87 ± 0.13)log),with a statistically significant difference (t =-6.20,P ＜ 0.05),while both the Gabor orientation training group (before:(1.75 ± 0.19) log,after:(1.68 ± 0.30) log) and the control group (before:(1.67 ±0.25) log,after:(1.61 ± 0.26) log)) showed no statistically significant difference (P ＞ 0.05) in terms of contrast sensitivity.Conclusion N-back working memory training shows a positive effect on improving contrast sensitivity in Gabor identification training,and can be used as a means to improve contrast sensitivity.

Raf kinase inhibitor protein (RKIP)is a member of the phosphatidylethanolamine-binding protein family, which can inhibit the metastasis of tumor cells and is closely associated with the occurrence and development of tumor. Matrix metalloproteinase-9 (MMP-9)is a endopeptidase that can degrade extracellular matrix and plays an important role in invasion and metastasis of tumor.This article reviewed the advances in studies on RKIP and MMP-9 in colorectal cancer.

Up to date, there are two types of drugs approved to treat hepatitis B: interferons and nucleos (t) ide analogues. However, the therapies are limited in the clinical context because of the negative side effects of interferon-α and the development of substantial viral resistance to nucleos (t) idic inhibitors. Therefore, new drugs with novel structures and mechanisms are needed. In this article, the drugs approved by FDA or the European Commission for treating chronic hepatitis B virus infection, as well as those under clinical trials, and several compounds in preclinical studies are reviewed. Additionally, some potential targets and strategies to combat chronic hepatitis B virus infection are discussed.

Objective To analyze the pressure source and effect of comprehensive intervention in type 2 diabetes mellitus patients. Methods 200 diabetes patients were randomized into the observation group and the control group with 100 cases in each group. Comprehensive intervention was introduced into the observation group and the control group underwent routine treatment. The pressure source was investigated after intervention by questionnaires and the results were compared. Results Fearing of serious complications bocame the most common cause of pressure. The scores of Self-rating Depression Scale(SDS)and Self-rating Anxiety Scale(SAS)were lower and the biochemical index was also better in the observation group than those in the control group as well as those before intervention in the observation group(P＜0.05).Conclusion The depression, anxiety status and biochemical index in patients with type 2 diabetes mellitus were effectively controled by corresponding and comprehensive intervention measures according to the sequence order of pressure source.

Objective To compare the effects of oral Sildenafil(SIL)and intravenous prostaglandin E_1(Alprostadil,PGE_1)in treatment of postoperative pulmonary hypertension(PH)associated with congenital heart defects(CHD).Methods Data were collected from 24 children with postoperative mPAP≥35 mmHg in our hospital between August 2004 and March 2005.These children were randomly divided into three groups:8 children(group A)initially received SIL(0.35 mg/kg,orally by nasal gastric tube),followed by the addition of intravenous PGE_1(20 ng/kg per min)at 40 min.The second group of 8 children(group C)initially received intravenous PGE_1 followed by the addition of SIL at 20 min(dose as above).And remains(group B)were placebo-controlled.The changes of hemodynamic variables,arterial blood gas,lung static compliance(C)and work of breathing(W)were measured after drugs were given.Results Compared with group B,the mPAP and mPAP/mSAP was significantly reduced(P

Objective To investigate the role of microsatellite instability(MSI) in the carcinogenesis and development of gastric cancer (GC). Methods MSI was examined in 36 gastric cancer specimens obtained endoscopically and during surgery and in 30 intestinal metaplasia specimens using PCR SSCP methods. Results MSI was detected in 15 of 36 GC and 9 of 30 intestinal metaplasia specimens at one or more loci. MSI was positive in all three cases of early GC. The incidence of MSI in well differenciated GC was significantly higher than that in poorly differentiated GC (66.7% vs 26.3%, P