نتایج جستجو برای: aggregative adherence

تعداد نتایج: 56333  

2009
Carlos Alós-Ferrer Ana B. Ania

We extend the analysis in Alós-Ferrer and Ania (2005) to allow for memory in the imitative learning process. Adding memory allows to detect and correct unprofitable deviations and makes it harder to disturb Nash equilibria with spiteful deviations that achieve a relative advantage. We show for the case of general aggregative submodular games that perfectly competitive outcomes are still stochas...

Journal: :Japanese journal of infectious diseases 2000
M Yamazaki K Inuzuka H Matsui K Sakae Y Suzuki Y Miyazaki K Ito

(2). The aggregative adherence of EAggEC was due to the presence of aggregative adherence fimbriae (AAF), AAF/ 1 and AAF/lI, whose expression lS positively controlled by the aggR gene (2)・ This aggR gene is present in many EAggECs, but some aggR-positive E. coli isolates have no AAFs (3,4). EAggEC was found to produce EAggEC heat-stable enterotoxin (EASTl encoded by astA, molecular weight 4.1 k...

Mohammad Mehdi Aslani, Naser Badami, Saeid Bouzari ,

The adherence property of 70 verotoxigenicE. coli (VTEC) strains, not belonging to O157: H7 serotype (non-O157) was checked on HeLa cells adherence assay. These strains were isolated from patients with diarrhea and healthy individuals. The results obtained in this study revealed that localised adherence (LA) was manifested by 3 strains of which two belonged to serogroups O111, O127 and the thir...

Journal: :Journal of bacteriology 2009
Samhita Bhargava Brandon B Johnson Jennifer Hwang Tamia A Harris Anu S George Amanda Muir Justin Dorff Iruka N Okeke

Enteroaggregative Escherichia coli (EAEC) is an important cause of acute and persistent diarrhea. The defining stacked brick adherence pattern of Peruvian EAEC isolate 042 has previously been attributed to aggregative adherence fimbriae II (AAF/II), which confer aggregative adherence on laboratory E. coli strains. EAEC strains also show exceptional autoaggregation and biofilm formation, other p...

Journal: :FEMS microbiology letters 2006
Renu Bhardwaj Siddhartha Majumdar Nirmal K Ganguly Neelam Taneja Shanta Dutta Thanadavarayan Ramamurthy Anuradha Chakraborti

Enteroaggregative Escherichia coli (EAEC) are causative agents of diarrhea, being characterized by aggregative adherence to cultured epithelial cells. In this study, phenotypic properties of EAEC were analyzed with respect to AA, hemagglutination, clump and biofilm formation, all of which are mediated by aggregative adherence fimbriae (AAF). The strains were also screened for AAF types, AAF adh...

2018
Anubama Rajan Lucy Vela Xi-Lei Zeng Xiaomin Yu Noah Shroyer Sarah E Blutt Nina M Poole Lily G Carlin James P Nataro Mary K Estes Pablo C Okhuysen Anthony W Maresso

Enteroaggregative Escherichia coli (EAEC) is an important diarrheal pathogen and a cause of both acute and chronic diarrhea. It is a common cause of pediatric bacterial diarrhea in developing countries. Despite its discovery in 1987, the intestinal tropism of the pathogen remains unknown. Cell lines used to study EAEC adherence include the HEp-2, T-84, and Caco-2 lines, but they exhibit abnorma...

Journal: :Infection and immunity 1997
J R Czeczulin S Balepur S Hicks A Phillips R Hall M H Kothary F Navarro-Garcia J P Nataro

Enteroaggregative Escherichia coli (EAEC) has been implicated as an agent of pediatric diarrhea in the developing world. We have shown previously that EAEC adheres to HEp-2 cells by virtue of a plasmid-encoded fimbrial adhesin designated aggregative adherence fimbria I (AAF/I), the genes for which have been cloned and sequenced. However, not all EAEC strains express AAF/I. Using TnphoA mutagene...

Journal: :Romanian journal of morphology and embryology = Revue roumaine de morphologie et embryologie 2014
Carmen Curutiu Mariana Carmen Chifiriuc Florin Iordache Coralia Bleotu Veronica Lazăr Carmen Aurelia Mogoantă Cristian Radu Popescu Raluca Grigore Serban Vifor Gabriel Berteşteanu

Intracellular invasion of professional phagocytic cells like monocytes and macrophages by a pathogen usually triggers the apoptosis of the host cells. The aim of this study was to evaluate if Pseudomonas aeruginosa, although not considered a classic intracellular pathogen, could adhere to endothelial cell surface, invade the intracellular compartment and subsequently induce apoptosis of the cel...

Journal: :Journal of clinical microbiology 1989
T A Gomes P A Blake L R Trabulsi

To determine the possible role of Escherichia coli strains with three different patterns of adherence to HeLa cells in causing diarrhea in infants in São Paulo, Brazil, we studied stool specimens from 100 infants up to 1 year of age with acute diarrheal illnesses and 100 age-matched control infants without recent diarrhea. E. coli with localized adherence to HeLa cells was much more common in p...

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