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https://www.readbyqxmd.com/read/28332937/yersinia-spp-in-wild-rodents-and-shrews-in-finland
#1
Suvi Joutsen, Riikka Laukkanen-Ninios, Heikki Henttonen, Jukka Niemimaa, Liina Voutilainen, Eva R Kallio, Heikki Helle, Hannu Korkeala, Maria Fredriksson-Ahomaa
Yersinia enterocolitica and Yersinia pseudotuberculosis are important zoonotic bacteria causing human enteric yersiniosis commonly reported in Europe. All Y. pseudotuberculosis strains are considered pathogenic, while Y. enterocolitica include both pathogenic and nonpathogenic strains which can be divided into six biotypes (1A, 1B, and 2-5) and about 30 serotypes. The most common types causing yersiniosis in Europe are Y. enterocolitica bioserotypes 4/O:3 and 2/O:9. Strains belonging to biotype 1A are considered as nonpathogenic because they are missing important virulence genes like the attachment-invasion-locus (ail) gene in the chromosome and the virulence plasmid...
March 23, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28330807/dietary-myrtle-myrtus-communis-l-improved-non-specific-immune-parameters-and-bactericidal-activity-of-skin-mucus-in-rainbow-trout-oncorhynchus-mykiss-fingerlings
#2
Hadis Mansouri Taei, Abdolmajid Hajimoradloo, Seyed Hossein Hoseinifar, Hassan Ahmadvand
The present study examined the effects of dietary Myrtle (Myrtus communis L.) on non-specific immune parameters and bactericidal activity of skin mucus in rainbow trout (Oncorhynchus mykiss) fingerlings. Three hundred and sixty fingerlings (6.50 ± 0.55 g (were distributed in twelve cages (65 × 65 × 65 cm) with a metal framework. The study included four treatments repeated in triplicates. The treatments were feeding trouts with experimental diets containing different levels (0, 0.5, 1 and 1.5%) of Myrtle powder...
March 18, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28329174/ccr7-deficiency-modulates-t-cell-response-and-increases-susceptibility-to-yersinia-pseudotuberculosis-infection
#3
Joern Pezoldt, Fabio Pisano, Wiebke Heine, Maria Pasztoi, Maik Rosenheinrich, Aaron M Nuss, Marina C Pils, Immo Prinz, Reinhold Förster, Jochen Huehn, Petra Dersch
Background: To successfully limit pathogen dissemination an immunological link between the entry tissue of the pathogen and the underlying secondary lymphoid organs (SLO) needs to be established to prime adaptive immune responses. Here, the prerequisite of CCR7 to mount host immune responses within SLOs during gastrointestinal Yersinia pseudotuberculosis infection to limit pathogen spread was investigated. Methods: Survival, bacterial dissemination, intestinal and systemic pathology of wild type (WT) and CCR7-/- mice were assessed and correlated to the presence of immune cell subsets and cytokine responses throughout the course of infection...
January 27, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28327520/cytotoxicity-bactericidal-and-antioxidant-activity-of-sodium-alginate-hydrosols-treated-with-direct-electric-current
#4
Żaneta Król, Krzysztof Marycz, Dominika Kulig, Monika Marędziak, Andrzej Jarmoluk
The aim of the study was to investigate the effect of using direct electric current (DC) of 0, 200, and 400 mA for five minutes on the physiochemical properties, cytotoxicity, antibacterial, and antioxidant activity of sodium alginate hydrosols with different sodium chloride concentrations. The pH, oxidation-reduction potential (ORP), electrical conductivity (EC), and available chlorine concentration (ACC) were measured. The effect of sodium alginate hydrosols treated with DC on Staphylococcus aureus, Listeria monocytogenes, Bacillus cereus, Micrococcus luteus, Escherichia coli, Salmonella enteritidis, Yersinia enterocolitica, Pseudomonas fluorescence, and RAW 264...
March 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28321389/host-fih-mediated-asparaginyl-hydroxylation-of-translocated-legionella-pneumophila-effectors
#5
Christopher Price, Michael Merchant, Snake Jones, Ashley Best, Juanita Von Dwingelo, Matthew B Lawrenz, Nawsad Alam, Ora Schueler-Furman, Yousef A Kwaik
FIH-mediated post-translational modification through asparaginyl hydroxylation of eukaryotic proteins impacts regulation of protein-protein interaction. We have identified the FIH recognition motif in 11 Legionella pneumophila translocated effectors, YopM of Yersinia, IpaH4.5 of Shigella and an ankyrin protein of Rickettsia. Mass spectrometry analyses of the AnkB and AnkH effectors of L. pneumophila confirm their asparaginyl hydroxylation. Consistent with localization of the AnkB effector to the Legionella-containing vacuole (LCV) membrane and its modification by FIH, our data show that FIH and its two interacting proteins, Mint3 and MT1-MMP are acquired by the LCV in a Dot/Icm type IV secretion-dependent manner...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28320976/a-study-on-the-efficacy-of-the-recombinant-yersinia-adhesin-a-vaccine-against-yersiniosis-in-the-early-phase
#6
Kosuke Tsugo, Shin/Ichi Nakamura, Hiroko Yamanaka, Yumi Une
Yersinia pseudotuberculosis (Y. ptb) is a zoonotic pathogenic bacterial species of the family Enterobacteriaceae and causes yersiniosis, an acute intestinal infection in humans and animals. Y. ptb is often implicated in lethal epidemics in zoo animals and reductions in the breeding population, but a valid prevention method has not been established. Therefore, this study aimed to develop a vaccine for yersiniosis control. The immunogenicity of one of the adhesion factors involved in pathogenic mechanisms of Y...
March 20, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28317294/comparative-genome-analysis-reveals-important-genetic-differences-among-serotype-o1-and-serotype-o2-strains-of-y-%C3%A2-ruckeri-and-provides-insights-into-host-adaptation-and-virulence
#7
Desirée Cascales, José A Guijarro, Ana I García-Torrico, Jessica Méndez
Despite the existence of a commercial vaccine routinely used to protect salmonids against Yersinia ruckeri, outbreaks still occur, mainly caused by nonmotile and lipase-negative strains (serotype O1 biotype 2). Moreover, epizootics caused by other uncommon serotypes have also been reported. At the moment, one of the main concerns for the aquaculture industry is the expanding range of hosts of this pathogen and the emergence of new biotypes and serotypes causing mortality in fish farms and against which the vaccine cannot protect...
March 20, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28298258/susceptibility-to-rifaximin-and-other-antimicrobials-of-bacteria-isolated-in-patients-with-acute-gastrointestinal-infections-in-southeast-mexico
#8
O Novoa-Farias, A C Frati-Munari, M A Peredo, S Flores-Juárez, O Novoa-García, J Galicia-Tapia, C E Romero-Carpio
INTRODUCTION: Enteropathogenic bacteria isolated in Mexico City have shown a high rate of resistance to different antibiotics, with the exception of rifaximin (RIF). RIF is a nonabsorbable antibiotic that reaches high fecal concentrations (≈ 8,000μg/g). Susceptibility to antimicrobials can vary in different geographic regions. AIM: To study the susceptibility to rifaximin and other antimicrobials of enteropathogenic bacteria isolated in patients with acute diarrhea in the southeastern region of Mexico...
March 12, 2017: Revista de Gastroenterología de México
https://www.readbyqxmd.com/read/28296562/immunomodulatory-yersinia-outer-proteins-yops-useful-tools-for-bacteria-and-humans-alike
#9
Benjamin Grabowski, M Alexander Schmidt, Christian Rüter
Human-pathogenic Yersinia produce plasmid-encoded Yersinia outer proteins (Yops), which are necessary to down-regulate anti-bacterial responses that constrict bacterial survival in the host. These Yops are effectively translocated directly from the bacterial into the target cell cytosol by the type III secretion system (T3SS). Cell-penetrating peptides (CPPs) in contrast are characterized by their ability to autonomously cross cell membranes and to transport cargo - independent of additional translocation systems...
March 15, 2017: Virulence
https://www.readbyqxmd.com/read/28293231/isolation-of-francisella-tularensis-and-yersinia-pestis-from-blood-cultures-by-plasma-purification-and-immunomagnetic-separation-accelerates-antibiotic-susceptibility-determination
#10
Ronit Aloni-Grinstein, Ofir Schuster, Shmuel Yitzhaki, Moshe Aftalion, Sharon Maoz, Ida Steinberger-Levy, Raphael Ber
The early symptoms of tularemia and plague, which are caused by Francisella tularensis and Yersinia pestis infection, respectively, are common to other illnesses, resulting in a low index of suspicion among clinicians. Moreover, because these diseases can be treated only with antibiotics, rapid isolation of the bacteria and antibiotic susceptibility testing (AST) are preferable. Blood cultures of patients may serve as a source for bacteria isolation. However, due to the slow growth rates of F. tularensis and Y...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28283072/presence-of-ail-and-ystb-genes-in-yersinia-enterocolitica-biotype-1a-isolates-from-game-animals-in-poland
#11
A Platt-Samoraj, K Syczyło, A Szczerba-Turek, A Bancerz-Kisiel, A Jabłoński, S Łabuć, J Pajdak, N Oshakbaeva, W Szweda
The pathogenicity of Yersinia enterocolitica is associated with the presence of plasmid and chromosomal virulence genes. Strains belonging to biotype 1A do not possess pYV plasmids, often harbour the ystB gene and usually lack the ail gene, which is the main virulence marker for Y. enterocolitica. The simultaneous presence of ail and ystB is uncommon. In this study, 21/218 (9.6%) biotype 1A Y. enterocolitica isolates from rectal swabs of wild boar (Sus scrofa; n = 18), red deer (Cervus elaphus; n = 2) and roe deer (Capreolus capreolus; n = 1) in Poland harboured both ail and ystB genes...
March 2017: Veterinary Journal
https://www.readbyqxmd.com/read/28281200/zntr-positively-regulates-t6ss4-expression-in-yersinia-pseudotuberculosis
#12
Tietao Wang, Keqi Chen, Fen Gao, Yiwen Kang, Muhammad Tausif Chaudhry, Zhuo Wang, Yao Wang, Xihui Shen
The type VI secretion system (T6SS) is a widespread and versatile protein secretion system found in most Gramnegative bacteria. Studies of T6SS have mainly focused on its role in virulence toward host cells and inter-bacterial interactions, but studies have also shown that T6SS4 in Yersinia pseudotuberculosis participates in the acquisition of zinc ions to alleviate the accumulation of hydroxyl radicals induced by multiple stressors. Here, by comparing the gene expression patterns of wild-type and zntR mutant Y...
March 10, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28271671/overnight-enrichment-is-essential-for-reliable-salmonella-pcr-testing-from-fecal-samples
#13
Dietmar Wolff, Andreas Gerritzen
BACKGROUND: A rapid molecular test for identifying cases of infectious diarrhea might be beneficial for patients. METHODS: We established a LightMix modular multiplex PCR assay for rapid detection of Campylobacter, Salmonella, Yersinia, and Shigella species from fecal samples. RESULTS: Unlike Campylobacter sp., direct detection of Salmonella from feces by multiplex PCR was significantly less sensitive than culture. Only 11 out of 21 (52%) Salmonella culture positive specimens were positive for Salmonella in the direct multiplex PCR assay (Campylobacter: 52/53 samples [98%])...
March 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28264910/the-expanding-role-of-type-ii-secretion-in-bacterial-pathogenesis-and-beyond
#14
Nicholas P Cianciotto, Richard C White
Type II secretion (T2S) is one means by which Gram-negative pathogens secrete proteins into the extracellular milieu and/or host organisms. Based upon recent genome sequencing, it is clear that T2S is largely restricted to the Proteobacteria, occurring in many, but not all genera in the α-, β-, γ-, and δ- classes. Prominent human and/or animal pathogens that express a T2S system(s) include Acinetobacter baumannii, Burkholderia pseudomallei, Chlamydia trachomatis, Escherichia coli, Klebsiella pneumoniae, Legionella pneumophila, Pseudomonas aeruginosa, Stenotrophomonas maltophilia, Vibrio cholerae, and Yersinia enterocolitica T2S-expressing plant pathogens include Dickeya dadantii, Erwinia amylovora, Pectobacterium carotovorum, Ralstonia solanacearum, Xanthomonas campestris, Xanthomonas oryzae, and Xylella fastidiosa T2S also occurs in non-pathogenic bacteria, facilitating symbioses, among other things...
March 6, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28260338/-genotyping-by-crispr-and-regional-distribution-of-yersinia-pestis-in-qinghai-plateau-from-1954-to-2011
#15
X Q Xu, Y Q Xin, X Li, Q W Zhang, X Y Yang, Y Jin, H H Zhao, X Jin, Z Z Qi
Objective: To investigate the CRISPR genotypes (clusters) and regional distribution of Yersinia pestis in Qinghai-plateau. Methods: One hundred and two isolates of Y. pestis isolated from human plague patients, host animal and insect vectors from Qinghai-plateau were selected. The DNAs were extracted using the traditional sodium dodecyl sulfate decomposition and phenol-chloroform method. Three CRISPR loci YPa, YPb and YPc of 102 isolates of Y. pesits were amplified and sequenced, and then the CRISPR sequence analysis was carried out by comparing the latest published CRISPR spacer dictionary and the NCBI database to identify the spacer and spacer array...
March 6, 2017: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/28257423/mechanism-study-on-a-plague-outbreak-driven-by-the-construction-of-a-large-reservoir-in-southwest-china-surveillance-from-2000-2015
#16
Xin Wang, Xiaoyu Wei, Zhizhong Song, Mingliu Wang, Jinxiao Xi, Junrong Liang, Yun Liang, Ran Duan, Kecheng Tian, Yong Zhao, Guangpeng Tang, Lv You, Guirong Yang, Xuebin Liu, Yuhuang Chen, Jun Zeng, Shengrong Wu, Shoujun Luo, Gang Qin, Huijing Hao, Huaiqi Jing
BACKGROUND: Plague, a Yersinia pestis infection, is a fatal disease with tremendous transmission capacity. However, the mechanism of how the pathogen stays in a reservoir, circulates and then re-emerges is an enigma. METHODOLOGY/PRINCIPAL FINDINGS: We studied a plague outbreak caused by the construction of a large reservoir in southwest China followed 16-years' surveillance. CONCLUSIONS/SIGNIFICANCE: The results show the prevalence of plague within the natural plague focus is closely related to the stability of local ecology...
March 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28253462/henoch-sch%C3%A3-nlein-purpura-following-yersinia-enterocolitica-infection
#17
Kylie Ngu, Kate J Robson, David J Goodman
No abstract text is available yet for this article.
March 6, 2017: Medical Journal of Australia
https://www.readbyqxmd.com/read/28243913/immunogenesis-in-white-mice-infected-with-yersinia-pestis-with-different-plasmid-composition
#18
S V Balakhonov, S A Vityazeva, V I Dubrovina, T P Starovoitova, G B Mukhturgin, T A Ivanova, K M Korytov, S I Kolesnikov
Morphological changes in the immunocompetent organs of white mice with experimental plague infection manifested in activation of the immune response of different degree and pathological process of different severity that depended on the plasmid composition of Y. pestis. Widening of the T-dependent zones in the immune organs of white mice infected with isogenic strains of Y. pestis with different plasmid composition attests to activation of cellular immunity. Our findings allow considering Y. pestis subsp. altaica I-2948/3, Y...
February 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28239773/high-resolution-solid-state-nmr-spectroscopy-of-the-yersinia-pestis-outer-membrane-protein-ail-in-lipid-membranes
#19
Yong Yao, Samit Kumar Dutta, Sang Ho Park, Ratan Rai, L Miya Fujimoto, Andrey A Bobkov, Stanley J Opella, Francesca M Marassi
The outer membrane protein Ail (Adhesion invasion locus) is one of the most abundant proteins on the cell surface of Yersinia pestis during human infection. Its functions are expressed through interactions with a variety of human host proteins, and are essential for microbial virulence. Structures of Ail have been determined by X-ray diffraction and solution NMR spectroscopy, but those samples contained detergents that interfere with functionality, thus, precluding analysis of the structural basis for Ail's biological activity...
February 26, 2017: Journal of Biomolecular NMR
https://www.readbyqxmd.com/read/28235583/immune-responses-of-channel-catfish-following-the-stimulation-of-three-recombinant-flagellins-of-yersinia-ruckeri-in%C3%A2-vitro-and-in%C3%A2-vivo
#20
Jie Jiang, Wuyi Zhao, Quanxin Xiong, Kaiyu Wang, Yang He, Jun Wang, Defang Chen, Yi Geng, Xiaoli Huang, Ping Ouyang, Weimin Lai
Innate immunity is initiated depending on the recognition of certain protein receptors termed pattern recognition receptors (PRRs) of pathogen-associated molecular patterns (PAMPs) to protect the host from various invading pathogens. As one of the most powerful PAMPs, flagellin is the major structural component of the flagellum that provides the main force for bacterial motility in flagellated microorganisms. The genome of the Y. ruckeri strain SC09 contains three flagellin genes, which encode the flagellins FlaA, FlaB and FlaC, respectively...
February 21, 2017: Developmental and Comparative Immunology
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