This article reviewed the researches proceeding on the contamination and detection of the foodborne pathogen noroviruses (NoVs) in fresh produce, which involved the NoVs contaminations in fresh produce, the special attachment of NoVs in fresh produce, the NoVs outbreaks associated with fresh produce and the NoVs detection in fresh produce. There had been an increase in reported infectious disease risks associated with the consumptions of fresh produce for recent 30 years. Because the NoVs, as a primary cause of viral gastroenteritis thoughout the world, were highly contagious, had a low infectious dose, and were persistent in the environment. And also the methods for NoVs detection in food had significantly developed over the last 15 years. Currently NoVs were the most common pathogen accounting for 40% of outbreaks associated with fresh produce (i. e., fruits and vegetables). Data from outbreaks investigations verified fresh produce as the high risk food products for NoVs. The fresh produce were typically eaten raw with no thermal processing, can be contaminated at any step during production and processing from faecally polluted water and fertilizers, the poor hygiene practices by food handlers and the cross-contamination. The attachment of NoVs to the fresh produce was due to the physio-chemical factors of virus protein coat, the special attachment to different fresh produce, and the possibility for internalization of NoVs. It might provide answers to why those high risk foods were more frequently implicated (i. e., lettuce and raspberries). According to the data of foodborne NoVs outbreaks which were associated with fresh produce from EU countries and the USA, the outbreaks in EU countries were mainly associated with NoVs contaminated raspberries and lettuce, while in USA which were associated with NoVs contaminated lettuce. Unfortunately, there were no NoVs detection methods for fresh produce or the data of foodborne NoVs outbreaks which were associated with fresh produce in China. That made it difficult to analyze the NoVs contamination situation in China. The heterogeneous distributions of presumably low levels of virus, which presented in contaminated fresh produce, also made it difficult to detect NoVs. To solve this problem, different sampling methods, viral elution methods and RT-qPCR methods were chosen. For example, according to the isoelectric point of NoVs particles, high pH and high ionic strength solution could be used as means for releasing NoVs. For the elution from acidic fruit, the buffer capacity and the virus recovery could be increased by the addition of tris-HCl. When analyzing pectin containing raspberries or strawberries, the viral elution usually incubated with pectinase at neutral pH to avoid from foaming jelly. In this paper, the latest ISO standard for NoV detection in food and the new approaches for NoV detection were also reviewed to provide references for domestic researches. It was necessary to establish and develop domestic methods for NoV detection in fresh produce, especially the different NoV conventional molecular detection methods with corresponding NoV extraction methods, which targeted to the different adsorption characteristics of different fruits and vegetables, in order to strengthen the national food safety monitoring.
Food Analysis ; methods ; Food Contamination ; analysis ; Foodborne Diseases ; virology ; Fruit ; virology ; Gastroenteritis ; virology ; Humans ; Norovirus ; classification ; genetics ; isolation & purification ; physiology ; Vegetables ; virology

BACKGROUND: Fiber post is widely used in front teeth aesthetic repair, but some defect teeth cannot form ferrule or thick root canal, which resulted in fiber post prosthetic replacement defluxion and a failure of repair. Presently, new-style resin cement had self sticking component, showing good effects in sticking of fiber post. Whether combination of new-style resin cement can repair affected teeth using fiber post deserves further investigation.OBJECTIVE: Through fatigue test, residual flexural strength and scanning electron microscope (SEM) observation to compare the strength of severely weakened roots restored with three resin cements. METHODS: Eighteen intact maxillary central incisors were collected and formed to severely weakened canals at the same size. Three kinds of resin cements were used to restore. Rely X Unicem, Panavia F and Super-Bond C&B resin cement and identical glass fiber post were used. All the specimens were restored using Ni-Cr ceramic crown, and placed on TCML chewing machine that loaded 1 200 000 cycle forces, and the cycle times when failure occurred were recorded. The samples were intact following loading received residual flexural strength testl SEM was employed to observe breakage surface of the samples. RESULTS AND CONCLUSION: Mean cyclic loading was significantly greater in the Super-Bond C&B Group (1 200 000 times) than in the Relyx Unicem Group (640 000 times) and Panavia F Group (550 000 times) (P< 0.05). No significant difference was detected between the Rely X Unicem and Panavia F Groups. Residual flexural strength was 747.99 N in the Super-Bond C&B Group. SEM demonstrated that Super-Bond C&B formed longer resin processes, which were more than other two groups. Results confirmed that Super-Bond C&B demonstrated better results when restoring flared roots with prefabricated glass fiber posts.

Objective To investigate the relationship of body mass index (BMI), blood glucose, and blood calcium with se-verity of acute pancreatitis .Methods A total of 127 cases of patients with acute pancreatitis was divided into 10 cases of severe acute pancreatitis group (SAP group), and 52 cases of mild acute pancreatitis group (MAP group), according to the severity.BMI, levels of blood sugar and blood calcium of two groups were compared , respectively .Correlation analysis was carried out among those parame-ters.Results The differences in BMI, blood sugar, and blood calcium between SAP and MAP groups were statistically significant , respectively ( P <0.05).The differences in BMI, blood sugar, and blood calcium between patients [Ranson score≥3, Balthazar computed tomography(CT) grade D or E, and computed tomography severity index (CTSI)≥3)] and patients [Ranson score<3, Balthazar CT grade A , B, or C, and CTSI<3 ( P <0.05 ) ] were statistically significant ( P <0.05 ) , respectively .Pearson correla-tion coefficient analysis showed significantly positive correlations among BMI , blood glucose , blood calcium , Ranson score , Balthazar CT grade, and CTSI ( P <0.05).Conclusions Severity of acute pancreatitis patients was related to BMI , blood sugar, and blood calcium.All of them can be used as evaluation index of disease progression and prognosis in patients .

Objective To study the gene expression on the inhibitory effect of endostatin on choroidal neovascularization in C57BL/6J mice and the mechanisms.Methods Photocoagulation using 532 nm diode laser was performed to establish a CNV model in mice’s eye.The mice were randomly divided into three groups:blank group (model group);endostatin group (experimental group),in which endostatin of 0.01 mg/2μL was given intravitreally;and saline group (control group),which received intravitreal injection of 2μL of 0.9 g/L saline.Four samples selected respectively from experimental group and control group were used to complete the gene expression profiling analysis.By comparing the differences of gene expression between the two groups,we selected the genes with expression difference ≥ 1.5 times and P ≤ 0.05. Results CD105 marking showed that choroidal neovascularization was significantly lower in endostatin group than in control group.The gene expression analysis showed that 1 1 6 genes were up-regulated and 1 0 6 genes were down-regulated in endostatin group compared with control group.GO analysis indicated that endostatin could inhibit cell activity and growth,but did not initiate the activity of the immune system,and even suppress it.Conclusion Endostatin can inhibit the activity and locomotion of endothelial cells and synergically inhibits the immune system,thus suppressing choroidal neovascular-ization.

Objective To investigate the clinical efficacy of acupuncture and massotherapy for cerebral palsy-salivation. Method Forty-eight patients with infantile cerebral palsy were randomly allocated to two groups. The control group of 24 patients received acupoint application of Chinese herbal medicine and did the tongue exercises. The observation group of 24 patients received acupuncture and massotherapy in addition. Result Of the control group, five patients were assessed as grade Ⅰ, four patients as grade Ⅱ, 10 patients as grade Ⅲ, two patients as grade Ⅳ and three patients as grade Ⅴ in the TDS grading after treatment. Of the observation group, 10 patients were assessed as grade Ⅰ, seven patients as grade Ⅱ, four patients as grade Ⅲ, two patients as gradeⅣ and one patients as grade Ⅴ in the TDS grading after treatment. The TDS grading assessment was better in the observation group of patients than in the control group. After treatment, middle cerebral artery blood flow velocity and vessel pulsation index were (135.64±13.72)cm/s and (1.05±0.17), respectively, in the control group and (144.78±16.45)cm/s and (0.90±0.18), respectively, in the observation group. There was no statistically significant difference in speech training between the two groups (P>0.05). The number of independent eating patients was significantly larger in the observation group than in the control group; there was a statistically significant difference (P<0.05). Fine action, adaptive behavior and personal social behavior development levels were significantly higher in the observation group than in the control group; there was a statistically significant difference (P<0.05). Both groups of patients could tolerate the therapeutic dosage and course and had no severe adverse reactions. There was no statistically significant difference in safety grade between the two groups (P>0.05). Conclusion Acupuncture and massotherapy is safe and of a fair effect in treating cerebral palsy-salivation. It can increase cerebral blood flow, promote the contraction of local muscles, control salivation and improve the quality of life in cerebral palsy patients.

Once umbilical cord ligation,neonatal kidney will be responsible for maintaining the whole-body homeostasis and the excretory requirements of the newborn. Meanwhile,there is a significant physiologic changes that occurs during the transition from intrauterine to extrauterine life. Neonatal renal reserve is less than adults,for the structure and function of the kidney still undergo a maturation process. Under the normal condi-tion,the adaptive changes of the renal function,with neonatal growth and development,can keep a delicate bal-ance of the internal environment. If they are exposed to a variety of external stressors,their immature kidney is especially vulnerable,which will not only cause fluid,electrolyte and acid-base imbalances and the adverse prog-nosis,but effect kidney structure and function further mature and increase the long-term risk of chronic kidney disease as well.

BACKGROUND:Cartilage is an avascular tissue and has a limited capacity for self-repair after injury. There are various methods for the treatment of articular cartilage injury ranging from conservation therapy to invasive surgery. With the development of tissue engineering technology, it provides a new way for treating articular cartilage injury. OBJECTIVE:To review the new development of tissue engineering technology for repairing articular cartilage injury. METHODS:The PubMed database and CNKI database were retrieved for articles from 2000 to 2013 by the first author with computer in May 2013. The key words were“cartilage tissue engineering, cartilage defect, stem cell, scaffold, growth factor”in English and Chinese. A total of 64 articles were included which related to cartilage regeneration and cartilage tissue engineering. For the articles in the same field, those published recently or in authorized journals were selected. RESULTS AND CONCLUSION:The three elements of cartilage tissue engineering, seed cells, scaffolds and cytokines, must be coordinated and mutual y beneficial development. At present, the research of tissue engineering for repairing articular cartilage injury has made a great progress. But the application in clinic has not enforced yet which is limited in experimental exploration stage. With the continuous development of new materials, the new tissue engineering cartilage repair materials should meet the requirement of material science and biological science, thus making the materials closely meet the biological characteristics of the self tissues. The animal studies wil turn to clinical experiments with the support of new technique, which make a breakthrough in the treatment of articular cartilage injury.

Objective:To observe the clinical efficacy of electroacupuncture and rehabilitation exercises in the treatment of cerebral infarction.Methods:Seventy-four patients with cerebral infarction were randomized into treatment group and control group in visit sequence.Thirty-seven cases in treatment group were treated with electroacupuncture and rehabilitation exercises,and other 37 cases in control group were treated with electroacupuncture alone.The treatment was given once a day and there was a 2-day interval after any consecutive 5 treatments.After total 30 treatments,Fugl-Meyer scale was used to evaluate motor function and Barthel Index to evaluate the activities of daily living.Results:After treatments,the motor function of paralyzed limb and activities of daily living were obviously improved in both groups,with more significant improvement in treatment group than in control group (P＜0.05).Conclusion:Combination of electroacupuncture and rehabilitation exercises has better effects than simple electroacupuncture in the treatment of cerebral infarction.

Purpose　To judge the value of CT in the diagnosis of acute pancreatitis. Methods　74 cases of acute pancreatitis confirmed by operation were reviewed. All patients underwent CT plain and contrast -enhanced scanning. Oral contrast agents were used. Results　According to clinical diagnosis, they were devided into edematous type(n=53),and necrotic type(n=21). 7 cases were complicated with abscesses, and 5 cases died. According to CT finding, Grade A,n=10; Grade B,n=16; Grade C,n=19; Grade D,n=16; Grade E, n=13. Conclusion　 CT is valuable in the diagnosis of acute pancreatitis, and CT grade is referable.

The ultraviolet spectrophotometric method for determination of vitamin A in breast milk was simplified. The milk sample was extracted directly with ammonia water, ethyl alcohol and ether, the saponification procedure be- ing omitted. The optimal height of the aluminum oxide adsorption column and the optimal rate of flow for elution were developed. The observation was made whether the elution for vitamen A was complete by identifying the fluorescence of vitamin A directly under ultraviolet light in the eluat-es collected instead of SbCl3-Vitamin A blue color reaction. The simultaneous estimation of Vitamin A in breast milk and in the standard solution of Vitamin A with this method showed E300nm/E325nm less than 73%, agreeable with the British Pharmacopoeia. The recovery was 100.8%. This procedure has advantages of high sensitivity, simplicity, time saving and economy.