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https://www.readbyqxmd.com/read/28543598/assessment-of-fallopian-tube-fimbria-patency-with-4-dimensional-hysterosalpingo-contrast-sonography-in-infertile-women
#1
Weiqun Wang, Qiulan Zhou, Yafei Gong, Ying Li, Yinying Huang, Zhiyi Chen
OBJECTIVES: The purpose of this study was to evaluate the performance of 4-dimensional (4D) hysterosalpingo-contrast sonography (HyCoSy) for assessing fallopian tube fimbria patency in infertile women. METHODS: Seventy-seven infertile female patients with obstruction at the tubal fimbria or partial obstruction with pelvic adhesions were included. All of the patients underwent 4D HyCoSy enhanced by dynamic observation after a flush of normal saline and were followed with laparoscopic chromopertubation using methylene blue within 6 months...
May 24, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28541500/prophylactic-efficacy-of-hyperimmune-bovine-colostral-antiadhesin-antibodies-against-enterotoxigenic-escherichia-coli-diarrhea-a-randomized-double-blind-placebo-controlled-phase-1-trial
#2
Stephen J Savarino, Robin McKenzie, David R Tribble, Chad K Porter, Aisling O'Dowd, Joyce A Cantrell, Stephanie A Sincock, Steven T Poole, Barbara DeNearing, Colleen M Woods, Hye Kim, Shannon L Grahek, Carl Brinkley, Joseph H Crabb, A Louis Bourgeois
Background.: Tip-localized adhesive proteins of bacterial fimbriae from diverse pathogens confer protection in animal models, but efficacy in humans has not been reported. Enterotoxigenic Escherichia coli (ETEC) commonly elaborate colonization factors comprising a minor tip adhesin and major stalk-forming subunit. We assessed the efficacy of antiadhesin bovine colostral IgG (bIgG) antibodies against ETEC challenge in volunteers. Methods.: Adults were randomly assigned (1:1:1) to take oral hyperimmune bIgG raised against CFA/I minor pilin subunit (CfaE) tip adhesin or colonization factor I (CFA/I) fimbraie (positive control) or placebo...
May 24, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28531220/highly-conserved-type-1-pili-promote-enterotoxigenic-e-coli-pathogen-host-interactions
#3
Alaullah Sheikh, Rasheduzzaman Rashu, Yasmin Ara Begum, F Matthew Kuhlman, Matthew A Ciorba, Scott J Hultgren, Firdausi Qadri, James M Fleckenstein
Enterotoxigenic Escherichia coli (ETEC), defined by their elaboration of heat-labile (LT) and/or heat-stable (ST) enterotoxins, are a common cause of diarrheal illness in developing countries. Efficient delivery of these toxins requires ETEC to engage target host enterocytes. This engagement is accomplished using a variety of pathovar-specific and conserved E. coli adhesin molecules as well as plasmid encoded colonization factors. Some of these adhesins undergo significant transcriptional modulation as ETEC encounter intestinal epithelia, perhaps suggesting that they cooperatively facilitate interaction with the host...
May 22, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28529572/recurrent-female-adnexal-tumor-of-probable-wolffian-origin-treated-with-debulking-surgery-imatinib-and-paclitaxel-carboplatin-combination-chemotherapy-a-case-report
#4
Akihiko Wakayama, Hirofumi Matsumoto, Hajime Aoyama, Masanao Saio, Ayumi Kumagai, Takuma Ooyama, Morihiko Inamine, Yoichi Aoki
In view of the small number of recurrent and metastatic cases of female adnexal tumors of probable Wolffian origin (FATWO), there is a distinct lack of evidence to support recommendations regarding treatment. In the present study, a 37-year-old female was diagnosed with a left adnexal tumor and underwent a left salpingo-oophorectomy (SO). The tumor was found to arise from the left tubal fimbria and extend to the posterior leaf of the broad ligament. Pathological examination identified a number of solid, tubular and cystic architectures, with areas of hyalinization, hemorrhage and necrosis...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28513461/the-importance-of-bordetella-pertussis-strains-which-do-not-produce-virulence-factors-in-the-epidemiology-of-pertussis
#5
Maciej Polak, Anna Lutyńska
Bordetella pertussis strains, which have lost the ability to produce antigens, such as pertactin - Prn, pertussis toxin - Ptx, filamentous haemagglutinin - FHA, fimbriae type 2 and 3 - Fim 2 and 3, tracheal colonization factor - TcfA, have recently been isolated in countries with a high vaccination coverage. The emergence of such isolates might have resulted from B. pertussis natural evolution course or adaptive mechanisms, allowing increased circulation of the pathogen in vaccinated populations. So far, the majority of described mutants were deficient in the Prn production...
May 9, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28510688/two-component-systems-required-for-virulence-in-pseudomonas-aeruginosa
#6
V I Francis, E C Stevenson, S L Porter
Pseudomonas aeruginosa is a versatile opportunistic pathogen capable of infecting a broad range of hosts, in addition to thriving in a broad range of environmental conditions outside of hosts. With this versatility comes the need to tightly regulate its genome to optimise its gene expression and behaviour to the prevailing conditions. Two-component systems (TCSs) comprising sensor kinases and response regulators, play a major role in this regulation. This minireview discusses the growing number of two-component systems that have been implicated in the virulence of Pseudomonas aeruginosa, with a special focus on the emerging theme of multikinase networks, which are networks comprising multiple sensor kinases working together, sensing and integrating multiple signals to decide upon the best response...
May 16, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28506262/identification-and-quantification-of-virulence-factors-of-enterotoxigenic-escherichia-coli-by-high-resolution-melting-curve-quantitative-pcr
#7
Weilan Wang, Ruurd T Zijlstra, Michael G Gänzle
BACKGROUND: Diagnosis of enterotoxigenic E. coli (ETEC) associated diarrhea is complicated by the diversity of E.coli virulence factors. This study developed a multiplex quantitative PCR assay based on high-resolution melting curves analysis (HRM-qPCR) to identify and quantify genes encoding five ETEC fimbriae related to diarrhea in swine, i.e. K99, F41, F18, F6 and K88. METHODS: Five fimbriae expressed by ETEC were amplified in multiple HRM-qPCR reactions to allow simultaneous identification and quantification of five target genes...
May 15, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28504575/alleviation-of-enterotoxigenic-escherichia-coli-challenge-by-recombinant-lactobacillus-plantarum-expressing-a-faeg-and-dc-targeting-peptide-fusion-protein
#8
G Yang, Y Jiang, P Tong, C Li, W Yang, J Hu, L Ye, W Gu, C Shi, B Shan, C Wang
FaeG is the major subunit of K88 fimbriae. These cell surface attachments are considered to be the major virulence factor of enterotoxigenic Escherichia coli (ETEC), which causes diarrhoea in piglets. The use of dendritic cell-targeting peptide (DCpep) has been demonstrated to be an effective approach to enhance the immunity of vaccines. Lactobacillus plantarum is an attractive candidate for oral vaccination owing to its beneficial effects and safety. In this study, L. plantarum was employed to deliver a FaeG-DCpep fusion antigen, and the immune response in mice was evaluated...
May 15, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/28501978/growth-performance-oxidative-stress-and-non-specific-immune-responses-in-juvenile-sablefish-anoplopoma-fimbria-by-changes-of-water-temperature-and-salinity
#9
Jun-Hwan Kim, Hee-Ju Park, Kyeong-Wook Kim, In-Ki Hwang, Do-Hyung Kim, Chul Woong Oh, Jung Sick Lee, Ju-Chan Kang
Juvenile sablefish, Anoplopoma fimbria (mean length 15.5 ± 1.9 cm, mean weight 68.5 ± 4.8 g), were used to evaluate the effects on growth, oxidative stress, and non-specific immune responses by changes of water temperature (8, 10, 12, 14, 16, 18, and 20 °C) and salinity (100 (35.0), 90 (31.5), 80 (28.0), 70 (24.5), 60 (21.0), 50 (17.5), and 40% (14.0) (‰)) for 4 months. The growth performance was significantly increased at the temperature of 12 and 14 °C, and the feed efficiency was notably decreased at the temperature of 18 °C...
May 13, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28497028/inactive-gingipains-from-p-gingivalis-selectively-skews-t-cells-toward-a-th17-phenotype-in-an-il-6-dependent-manner
#10
Izabela Glowczyk, Alicia Wong, Barbara Potempa, Olena Babyak, Maciej Lech, Richard J Lamont, Jan Potempa, Joanna Koziel
Gingipain cysteine proteases are considered key virulence factors of Porphyromonas gingivalis. They significantly influence antibacterial and homeostatic functions of macrophages, neutrophils, the complement system, and cytokine networks. Recent data indicate the role of P. gingivalis in T cell differentiation; however, the involvement of gingipains in this process remains elusive. Therefore, the aim of this study was to investigate the contribution of danger signals triggered by the gingipains on the generation of Th17 cells, which play a key role in protection against bacterial diseases but may cause chronic inflammation and bone resorption...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28488744/membrane-vesicle-secretion-and-prophage-induction-in-multidrug-resistant-stenotrophomonas-maltophilia-in-response-to-ciprofloxacin-stress
#11
Simon Devos, Wouter Van Putte, Jolien Vitse, Gonzalez Van Driessche, Stephan Stremersch, Wim Van Den Broek, Koen Raemdonck, Kevin Braeckmans, Henning Stahlberg, Misha Kudryashev, Savvas N Savvides, Bart Devreese
Several bacterial species produce membrane vesicles (MVs) in response to antibiotic stress. However, the biogenesis and role of MVs in bacterial antibiotic resistance mechanisms have remained unclear. Here we studied the effect of the fluoroquinolone ciprofloxacin on MV secretion by Stenotrophomonas maltophilia using a combination of electron microscopy and proteomic approaches. We found that in addition to the classical outer membrane vesicles (OMV), ciprofloxacin-stimulated cultures produced larger vesicles containing both outer and inner membranes termed outer-inner membrane vesicles (OIMV), and that such MVs are enriched with cytosolic proteins...
May 10, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28484050/using-tn-seq-to-identify-pigmentation-related-genes-of-porphyromonas-gingivalis-characterization-of-the-role-of-a-putative-glycosyltransferase
#12
Brian A Klein, Louis P Cornacchione, Marisha Collins, Michael H Malamy, Margaret J Duncan, Linden T Hu
Cellular pigmentation is an important virulence factor of the oral pathogen Porphyromonas gingivalis Pigmentation has been associated with many bacterial functions including but not limited to: colonization, maintaining a local anaerobic environment by binding oxygen molecules, and defense against reactive oxygen species (ROS) produced by immune cells. Pigmentation-associated loci identified to date have involved lipopolysaccharide, fimbriae and haem acquisition and processing. We utilized a transposon mutant library of P...
May 8, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28481935/genotypic-and-phenotypic-characterization-of-multidrug-resistant-salmonella-typhimurium-and-salmonella-kentucky-strains-recovered-from-chicken-carcasses
#13
Rizwana Tasmin, Nur A Hasan, Christopher J Grim, Ar'Quette Grant, Seon Young Choi, M Samiul Alam, Rebecca Bell, Christopher Cavanaugh, Kannan V Balan, Uma S Babu, Salina Parveen
Salmonella Typhimurium is the leading cause of human non-typhoidal gastroenteritis in the US. S. Kentucky is one the most commonly recovered serovars from commercially processed poultry carcasses. This study compared the genotypic and phenotypic properties of two Salmonella enterica strains Typhimurium (ST221_31B) and Kentucky (SK222_32B) recovered from commercially processed chicken carcasses using whole genome sequencing, phenotype characterizations and an intracellular killing assay. Illumina MiSeq platform was used for sequencing of two Salmonella genomes...
2017: PloS One
https://www.readbyqxmd.com/read/28473263/differences-in-white-matter-structure-between-seizure-prone-fast-and-seizure-resistant-slow-rat-strains
#14
Pragati Sharma, David K Wright, Leigh A Johnston, Kim L Powell, Mary E Wlodek, Sandy R Shultz, Terence J O'Brien, Krista L Gilby
Alterations in white matter integrity have been well documented in chronic epilepsy and during epileptogenesis. However, the relationship between white matter integrity and a predisposition towards epileptogenesis has been understudied. The FAST rat strain exhibit heightened susceptibility towards kindling epileptogenesis whereas SLOW rats are highly resistant. FAST rats also display behavioral phenotypes reminiscent of those observed in neurodevelopmental disorders that commonly comorbid with epilepsy. In this study, we aim to identify differences in white matter integrity that may contribute to a predisposition towards epileptogenesis and its associated comorbidities in 6month old FAST (n=10) and SLOW (n=10) male rats...
May 1, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28471379/supramolecular-recognition-of-escherichia-coli-bacteria-by-fluorescent-oligo-phenyleneethynylene-s-with-mannopyranoside-termini-groups
#15
Enrique Arias, Maria Teresa Méndez, Eduardo Arias, Ivana Moggio, Antonio Ledezma, Jorge Romero, Giancarlo Margheri, Emilia Giorgetti
Escherichia coli is one the most common bacteria responsible of uropathogenic diseases, which motives the search for rapid and easy methods of detection. By taking advantage of the specific interactions between mannose and type 1 fimbriae, in this work two fluorescent phenyleneethynylene (PE) trimers bearing one or two 4-aminophenyl-α-D-mannopyranoside termini groups were synthesized for the detection of E. coli. Three bacterial strains: ORN 178 (fimbriae I expression), ORN 208 (mutant serotype with no fimbriae expression) and one obtained from a local hospital (SS3) were used...
May 4, 2017: Sensors
https://www.readbyqxmd.com/read/28470089/contribution-of-the-csga-and-bcsa-genes-to-salmonella-enterica-serovar-pullorum-biofilm-formation-and-virulence
#16
Muhanad El Hag, Feng Zheng, Su Yangyang, Wang Xiao, Afrah Yassin, Chen Sujuan, Daxin Peng, Xiufan Liu
Salmonella biofilm formation is important to environmental stress resistance and virulence. However, the roles of the csgA and bcsA genes, which affect curli protein and cellulose production, respectively, in Salmonella enterica serovar Pullorum, are unknown. Here we constructed deletions in the csgA and bcsA genes in Salmonella enterica serovar Pullorum strain S6702 and evaluated several aspects of biofilm formation and virulence. ΔcsgA showed decreased production of curli fimbriae, while ΔbcsA had reduced cellulose production...
May 4, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28469711/capsular-polysaccharide-inhibits-adhesion-of-bifidobacterium-longum-105-a-to-enterocyte-like-caco-2-cells-and-phagocytosis-by-macrophages
#17
Amin Tahoun, Hisayoshi Masutani, Hanem El-Sharkawy, Trudi Gillespie, Ryo P Honda, Kazuo Kuwata, Mizuho Inagaki, Tomio Yabe, Izumi Nomura, Tohru Suzuki
BACKGROUND: Bifidobacterium longum 105-A produces markedly high amounts of capsular polysaccharides (CPS) and exopolysaccharides (EPS) that should play distinct roles in bacterial-host interactions. To identify the biological function of B. longum 105-A CPS/EPS, we carried out an informatics survey of the genome and identified the EPS-encoding genetic locus of B. longum 105-A that is responsible for the production of CPS/EPS. The role of CPS/EPS in the adaptation to gut tract environment and bacteria-gut cell interactions was investigated using the ΔcpsD mutant...
2017: Gut Pathogens
https://www.readbyqxmd.com/read/28469253/identification-of-streptococcus-cristatus-peptides-that-repress-expression-of-virulence-genes-in-porphyromonas-gingivalis
#18
Meng-Hsuan Ho, Richard J Lamont, Hua Xie
Dental plaque is a complex multispecies biofilm, and is a direct precursor of periodontal disease. The virulence of periodontal pathogens, such as Porphyromonas gingivalis, is expressed in the context of this polymicrobial community. Previously, we reported an antagonistic relationship between Streptococcus cristatus and P. gingivalis, and identified arginine deiminase (ArcA) of S. cristatus as the signaling molecule to which P. gingivalis responds by repressing the expression and production of FimA protein...
May 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28443510/a-combination-of-egg-yolk-igy-and-phosvitin-inhibits-the-growth-of-enterotoxigenic-escherichia-coli-k88-and-k99
#19
Naiyana Gujral, Heejoo Yoo, Fatemeh Bamdad, Kwang Yong Lee, Joo-Won Suh, Hoon Sunwoo
BACKGROUND: Enterotoxigenic Escherichia coli (ETEC) is the main cause of fatal diarrhea in piglets during the first week of life and over the time of weaning. Pathogenesis of ETEC-causing diarrhea involves intestinal colonization mediated by fimbriae. Although, both IgY and egg yolk phosvitin (PV) possess antimicrobial activity, their combined activity has not been explored. A combination of IgY specific for ETEC and metal-chelating PV may show synergistic effect in reducing the growth of ETEC by inhibiting bacterial proliferation and stipulating protection against ETEC infection...
April 25, 2017: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/28439262/turn-up-the-heat-food-and-clinical-escherichia-coli-isolates-feature-two-transferrable-loci-of-heat-resistance
#20
Erik J Boll, Roger Marti, Henrik Hasman, Søren Overballe-Petersen, Marc Stegger, Kim Ng, Susanne Knøchel, Karen A Krogfelt, Joerg Hummerjohann, Carsten Struve
Heat treatment is a widely used process to reduce bacterial loads in the food industry or to decontaminate surfaces, e.g., in hospital settings. However, there are situations where lower temperatures must be employed, for instance in case of food production such as raw milk cheese or for decontamination of medical devices such as thermo-labile flexible endoscopes. A recently identified locus of heat resistance (LHR) has been shown to be present in and confer heat resistance to a variety of Enterobacteriaceae, including Escherichia coli isolates from food production settings and clinical ESBL-producing E...
2017: Frontiers in Microbiology
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