非可培养状态霍乱弧菌的间接免疫荧光检测

目的建立检测水中活的非可培养状态霍乱弧菌(O1群、O139群)的间接免疫荧光法。方法用本实验室人工转化的非可培养状态霍乱弧菌的菌液制成抗原片,用混合诊断血清(抗O1群、O139群)作为一抗,异硫氰酸荧光素(FITC)标记猪抗兔IgG作为二抗,进行间接免疫荧光检测。结果该方法可以成功检测出水中非可培养状态霍乱弧菌,其检测下限约为104cells/400 ml。结论该方法具有较好的特异性和灵敏度,可作为自然水体中非可培养状态霍乱弧菌的检测方法,用于霍乱弧菌的生态研究。     

Non-01 Vibrio cholerae septicemia and meningitis in a neonate

Non-01 Vibrio cholerae is known to cause diarrhoea as well as extra-intestinal infections in adults and children. However meningitis in children is a rare occurrence. We report a neonate who developed septicemia and meningitis due toNon-01 Vibrio cholerae.     

治疗前后酒精灌胃大鼠创伤弧菌脓毒症肝组织Toll样受体等的变化

目的 探讨抗生素对酒精灌胃大鼠创伤弧菌(vibrio vulnificus,VV)脓毒症肝组织Toll样受体(Toll like receptor,TLR)等的影响.方法 大鼠设正常对照组(N组,6只)、酒精灌胃大鼠对照组(A组,6只)、酒精灌胃大鼠抗生素对照组(AA组,6只)、酒精灌胃大鼠VV脓毒症组(AV组,24只;分别于染菌后2、6、12、24 h处死,每时相点动物数均为6只)和酒精灌胃大鼠VV脓毒症抗生素治疗组(AVA组,30只;分别于染菌后6、12、24、36 h和1周时活杀,各时相点动物数均为6只).采用逆转录聚合酶链技术检测各组大鼠不同时点肝组织TLR等的变化.结果 AV-6 h组TLR4 mRNA表达量为0.775±0.101,AVA-6 h组TLR4 mRNA表达量为0.600±0.064;AV-12 h组TLR4 mRNA表达量为0.918±0.133,AVA-12 h组TLR4 mRNA表达量为0.583±0.112;AV-24 h组TLR4 mRNA表达量为0.732±0.110,AVA-24 h组TLR4 mRNA表达量为0.512±0.118.AVA组大鼠染菌后6、12、24h TLR4 mRNA,与同时点AV组相比,TLR4 mRNA表达量明显降低,差异有统计学意义(AVA-6 h组与AV-6 h组比较,t=-3.573,P＜0.01;AVA-12 h组与AV-12 h组比较,t=-4.722,P＜0.01;AVA-24 h组与AV-24 h组比较,t=-3.340,P＜0.01).结论 及早联用抗生素可减低酒精灌胃大鼠VV脓毒症肝组织TLR等的表达,有利于机体促、抗炎平衡恢复,对酒精灌胃大鼠VV脓毒症有明显的治疗作用.     

Vibrio vulnificus endophthalmitis occurring after ingestion of raw seafood

Ocular Vibrio vulnificus infections are quite rare, and all previously reported cases have been associated with exposure to seafood and seawater. Here, we report a case of endogenous endophthalmitis caused by V. vulnificus, occurring after the ingestion of raw seafood. This case was not associated with any cutaneous or other severe systemic manifestations.     

Biological effects of imidazolium ionic liquids with varying chain lengths in acute Vibrio fischeri and WST-1 cell viability assays

Detailed biological studies of methyl- and some ethylimidazolium ionic liquids in luminescent bacteria as well as in the IPC-81 (leukemia cells) and C6 (glioma cells) rat cell lines are presented. Effective concentrations in these test systems are generally some orders of magnitude lower than effective concentrations [corrected] of the conventional solvents acetone, acetonitrile, methanol, and methyl t-butyl ether. No general influence of the anionic compound in the ionic liquids on toxicity could be found, although they seem to modulate toxicity in some cases. The clear influence of the alkyl chain length on toxicity was quantified by linear regression analysis. Alkyl chain length of the longer alkyl chain was varied from 3 to 10 carbon atoms. Consequences for a design of sustainable alternative solvents are briefly sketched.     

Translocation of protein kinase-C with IP3-induced calcium mobilization by heat-stable enterotoxin of Vibrio cholerae non-O1 in isolated rat enterocytes

The activity of the calcium- and phospholipid-dependent enzyme protein kinase C (PKC) in response to heat-stable enterotoxin (NAG-ST) of Vibrio cholerae non-O1 was examined in isolated rat enterocytes. Optimal stimulation of the membrane-bound PKC activity (about 4.3-fold) was observed after 1 min of incubation of cells with 10 ng/ml toxin; and the effects were dose dependent. Following NAG-ST treatment an increase in PKC activity in the membrane fraction was found with a concomitant decrease in the cytosolic fraction suggesting the redistribution of the enzyme. The pronounced enzyme activity in presence of a classical pseudosubstrate and its complete inhibition by G? 6976 suggested the involvement of a calcium-dependent isoform of PKC (PKC-alpha). A time course study employing an immunoblot assay provided evidence that NAG-ST led to almost complete translocation of PKC-alpha to the membrane. A 65% inhibition of enzyme activity in the membrane fraction and inhibition of its translocation to some extent by dantrolene treatment further suggested that the enzyme was translocated with the rise of intracellular calcium ([Ca2+]i). The phosphorylation of three membrane proteins by toxin-induced PKC in vitro and abolition of this phosphorylation by G? 6976 demonstrated that phosphorylation of these membrane proteins was PKC-alpha mediated and might be involved in the alteration of membrane functions.     

The presence and antimicrobial susceptibilities of human-pathogen Vibrio spp. isolated from blue crab (Callinectes sapidus) in Belek tourism coast,Turkey

Monitoring of Vibrio species by blue crabs (Callinectes sapidus) was carried out during the winter period in a selected area of the Belek, Antalya Gulf. Eighty-three blue crabs were examined for Vibrio species. V. alginolyticus (30.1%), V. fluvialis (10.8%), V. damsela (9.6%), V. harveyi (3.6%), V. metschnikovii (3.6%) and V. vulnificus (2.4%) were isolated. V. vulnificus was the highest concentration (5 x 10(8) Vibrio ml(-1)) although it was only 2.4% isolated from blue crabs. The strains of different vibrio species were highly susceptible to doxycycline, tetracycline and ciprofloxacin.     

杭州市不同样品中副溶血性弧菌污染状况检测

目的了解杭州市食品和菜肴加工环节副溶血性弧菌污染状况及冷菜间厨师粪便带菌情况,为防制副溶血性弧菌食物中毒提供科学依据。方法依据国家标准GB/T4789.7-2003进行检验。结果431份海产品检出副溶血性弧菌49份,检出率为11.37%;77份冷菜检出2份,检出率为2.60%;403份加工环节采样样品检出24份,检出率为5.96%;300份冷菜间厨师粪便检出1份,检出率为0.33%。结论杭州市海产品、冷菜和菜肴加工环节均存在不同程度的副溶血性弧菌污染;冷菜间厨师粪便带菌率较低。     

检测水产品食物中副溶血弧菌基因分型方法的建立

目的建立副溶血弧菌的基因分型技术,应用于广州市水产品食物中毒居前列的致病菌——副溶血弧菌的检测,寻找一种简便快速准确的检验方法。方法分析副溶血性弧菌分离株的16S-23S rDNA IGS的相关信息(电泳图谱、序列分析等),找出合适的16S-23S rDNA IGS作为基因分型依据,建立副溶血性弧菌的基因分型技术。结果通过克隆和测序,分析了副溶血性弧菌的16S-23S rDNA IGS片段,初步确定了以16S-23S rDNA IGS为分子标记的副溶血性弧菌基因分型技术。结论本检测方法不但快速、灵敏,还对深入了解副溶血性弧菌的发病机制,研究其分子流行病学特征具有重要的意义。