Diarrhea is the leading cause of infant mortality worldwide, especially in the developing world. Among various etiologic agents within the Escherichia genus, Escherichia albertii is becoming recognized as a significant human enteropathogen. There has been little knowledge about the colonization and infection of E. albertii in comparison to its close relatives, E. coli.

Foot rot of tomato is an important disease which causes severe loss in tomato production. The present study was carried out to evaluate five bioagents and six fungicides against Sclerotium rolfsii. Among the five antagonists tested the maximum inhibition was observed in Trichoderma virens (67%) and contrarily, no inhibition was observed in Bacillus subtilis. Six fungicides viz., carbendazim, captan, tebuconozole, copper oxychloride, hexaconozole and Tebuconazole +Trifloxytrobin at different concentrations (50, 100, 150, 200, 250 and 500 ppm), were tested. Among the tested fungicides, systemic fungicides like hexaconazole, tebuconozole and combi product, Nativo (tebuconazole 50% + trifloxystrobin 25%) showed complete inhibition of S. rolfsii at all the concentration tested.

The chemical structure of lipid A from the lipopolysaccha-ride of the mushroom-associated bacterium Pseudomonas reactans,a pathogen of cultivated mushroom, was elucida-ted by compositional analysis and spectroscopic methods (MALDI-TOF and two-dimensional NMR). The sugar backbone was composed of theb-(1¢fi6)-linkedD-gluco-samine disaccharide 1-phosphate.

The gene encompassing ORF Rv1885c with weak sequence similarity to AroQ chorismate mutases (CMs) was cloned from the genome ofMycobac-terium tuberculosis and expressed in Escherichia coli. The gene product (*MtCM) complements a CM-deficient E. colistrain, but only if produced without the predicted N-terminal signal sequence typical ofM. tuberculosis. The mature *MtCM, which was purified by exploiting its resistance to irre-versible thermal denaturation, possesses high CM activity in vitro. The enzyme follows simple Michaelis–Menten kinetics, having a kcat of 50 s )1 and aKmof 180lm(at 30
C and pH 7.5)....

Lipopolysaccharide (LPS) andb-glucan from Francisella victoria, a fish pathogen and close relative of highly virulent mammal pathogenFrancisella tularensis, have been analyzed using chemical and spectroscopy methods. The polysaccharide part of the LPS was found to contain a nonrepetitive sequence of 20 monosaccharides as well as alanine, 3-aminobutyric acid, and a novel branched amino acid, thus confirmingF. victoriaas a unique species.

The aim of this study was the development of a sensitive and specific substrate for protease A (PrtA), a serralysin-like metzincin from the entomo-pathogenic microorganism,Photorhabdus. First, cleavage of three biological peptides, the A and B chains of insulin andb-lipotropin, and of 15 synthetic peptides, was investigated.

Over the years, several studies have been performed to analyse plant–patho-gen interactions. Recently, functional genomic strategies, including proteo-mics and transcriptomics, have contributed to the effort of defining gene and protein function and expression profiles. Using these ‘omic’ approaches, pathogenicity- and defence-related genes and proteins expressed during phytopathogen infections have been identified and enor-mous datasets have been accumulated.

Over-annotation of hypothetical ORFs is a common phenomenon in bacte-rial genomes, which necessitates confirming the coding reliability of hypo-thetical ORFs and then predicting their functions. The important plant pathogenErwinia carotovorasubsp. atrosepticaSCRI1043 (Eca1043) is a typical case because more than a quarter of its annotated ORFs are hypo-thetical.

Dispersin B (DspB), a family 20b-hexosaminidase from the oral pathogen Aggregatibacter actinomycetemcomitans, cleaves b(1,6)-linked N-acetylglu-cosamine polymer. In order to understand the substrate specificity of DspB, we have undertaken to characterize several conserved and noncon-served residues in the vicinity of the active site.

Oxylipins constitute a large family of bioregulators, biosynthesized via unsaturated fatty acid oxidation. This study reports the detection of an unprecedented family of complex oxylipins from flax leaves. Two major members of this family, compounds1and2, were isolated and purified. Their structures were evaluated using NMR and MS analyses.

A procedure has been developed for the isolation of cell walls from the hyphae of the causal agent for barley leaf scald,Rhynchosporium secalis (Oudem) J.J. Davis. Based primarily on monosaccharide linkage analysis, but also on the limited use of linkage-specific glucan hydrolases and solvent fractionation, the walls consist predominantly of (1,3⁄1,6)-b-d-glucans

Mitogen-activated protein kinase (MAPK) cascades play important roles in mediating pathogen responses and reactive oxygen species signaling. In plants, MAPKs are classified into four major groups (A–D). Previous stud-ies have mainly focused on groups A and B, but little is known about group C.

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học đề tài : Human herpesvirus 8 – A novel human pathogen

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Human herpesvirus 8 – A novel human pathogen

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Evaluation of reference genes for real-time RT-PCR expression studies in the plant pathogen Pectobacterium atrosepticum

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: A novel virus that infecting hypovirulent strain XG36-1 of plant fungal pathogen Sclerotinia sclerotiorum

A novel virus that infecting hypovirulent strain XG36-1 of plant fungal pathogen Sclerotinia sclerotiorum

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Gene expression profiling in susceptible interaction of grapevine with its fungal pathogen Eutypa lata: Extending MapMan ontology for grapevine

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: A plant natriuretic peptide-like molecule of the pathogen Xanthomonas axonopodis pv. citri causes rapid changes in the proteome of its citrus host

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Remarkable sequence similarity between the dinoflagellate-infecting marine girus and the terrestrial pathogen African swine fever virus Hiroyuki Ogata1, Kensuke Toyoda2, Yu