scholarly journals Fimbriae in Escherichia Coli Isolated from the Small Intestine of Piglets

1986 ◽  
Vol 27 (2) ◽  
pp. 235-242
Author(s):  
Berit Κ. Djønne ◽  
Eivind Liven
Keyword(s):  
Escherichia Coli ◽  
Small Intestine

Histopathological features in the small intestine of pigs infected with F4ac+ non-enterotoxigenic or enterotoxigenic strains of Escherichia coli

1995 ◽  
Vol 112 (1) ◽  
pp. 1-10 ◽  
Author(s):  
N. Vijtiuk ◽  
S. Ćurić ◽  
G. Lacković ◽  
I. Udovičić ◽  
I. Vrbanac ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Small Intestine ◽  
Histopathological Features

Escherichia coli heat-stable toxin: its effect on motility of the small intestine

1982 ◽  
Vol 242 (4) ◽  
pp. G360-G363 ◽  
Author(s):  
J. R. Mathias ◽  
J. Nogueira ◽  
J. L. Martin ◽  
G. M. Carlson ◽  
R. A. Giannella
Keyword(s):  
Escherichia Coli ◽  
Small Intestine ◽  
Action Potential ◽  
Myoelectric Activity ◽  
Complex Activity ◽  
E Coli ◽  
Heat Stable ◽  
Rabbit Small Intestine ◽  
Weight Substance

Escherichia coli heat-stable enterotoxin is a low-molecular-weight substance that has been shown to induce the active secretion of fluid and electrolytes in the small intestine. In this study, we have characterized the effects of purified E. coli heat-stable toxin (ST, strain 18D, serotype 042:K86:H37) on the motility of rabbit small intestine by using myoelectric recording techniques. Substances, such as cholera toxin, that activate the adenylate cyclase-cAMP system induced predominantly migrating action-potential complex activity. E. coli ST, a toxin that activates the guanylate cyclase-cGMP system, was infused into isolated in vivo ileal loops of New Zealand White rabbits. Inactivated toxin was also studied by exposing the ST to 1 mM dithiothreitol for 90 min. Active E. coli ST induced only repetitive bursts of action potentials. When the toxin was inactivated with dithiothreitol, no alteration in myoelectric activity was observed. We speculate that repetitive bursts of action-potential activity may represent a virulent factor of the bacterium, altering motor activity to slow transit and allowing for bacterial proliferation and invasion.

scholarly journals A high molecular weight soluble fraction of tempeh protects against fluid losses in Escherichia coli-infected piglet small intestine

2007 ◽  
Vol 98 (2) ◽  
pp. 320-325 ◽  
Author(s):  
Jeroen L. Kiers ◽  
M. J. Rob Nout ◽  
Frans M Rombouts ◽  
Marius J. A. Nabuurs ◽  
Jan van der Meulen
Keyword(s):  
Escherichia Coli ◽  
Molecular Weight ◽  
Small Intestine ◽  
High Molecular Weight ◽  
Internal Control ◽  
Soluble Fraction ◽  
Fluid Secretion ◽  
Fluid Absorption ◽  
Fluid Losses ◽  
Etec Infection

Enterotoxigenic Escherichia coli (ETEC) is an important cause of diarrhoea in children and piglets. Infection of ETEC results in fluid secretion and electrolyte losses in the small intestine. In this study the effects of tempeh, a traditional fungal fermented soyabean product, on fluid losses induced by ETEC infection in piglets was investigated. Pairs of ETEC-infected and non-infected small intestinal segments of piglets were perfused simultaneously for 8 h with pre-digested tempeh, its supernatant and saline as an internal control. In saline perfused segments, ETEC infection reduced net fluid absorption by more than 500 μl/cm2, whereas this reduction was significantly less for pre-digested tempeh and its supernatant (75 and 282 μl/cm2, respectively). The supernatant of pre-digested tempeh was also compared with its permeate and retentate fractions. These fractions were created by ultra-filtration and contained respectively low and high molecular weight (>5 kDa) compounds. Again ETEC infection caused a significant reduction of net fluid absorption when perfused with saline (386 μl/cm2) and also with the permeate fraction (300 μl/cm2), but much less with the supernatant and the retentate fraction (125 and 140 μl/cm2, respectively). The reduction in net fluid absorption upon ETEC infection when perfused with supernatant of either undigested or pre-digested tempeh was not different. Therefore from this study it can be concluded that a high molecular weight soluble fraction of tempeh is able to protect against fluid losses induced by ETEC, suggesting that this could play a potential role in controlling ETEC-induced diarrhoea.

scholarly journals Effect of a New ProbioticSaccharomyces cerevisiaeStrain on Survival ofEscherichia coliO157:H7 in a Dynamic Gastrointestinal Model

2010 ◽  
Vol 77 (3) ◽  
pp. 1127-1131 ◽  
Author(s):  
Lucie Etienne-Mesmin ◽  
Valérie Livrelli ◽  
Maud Privat ◽  
Sylvain Denis ◽  
Jean-Michel Cardot ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Saccharomyces Cerevisiae ◽  
Small Intestine ◽  
Ethanol Production ◽  
Bacterial Mortality

ABSTRACTSurvival ofEscherichia coliO157:H7 was investigated using a dynamic gastrointestinal model. A high bacterial mortality was observed in the stomach and duodenum. In contrast, bacteria grew in the distal parts of the small intestine. The coadministration ofSaccharomyces cerevisiaeCNCM I-3856 led to a significant reduction of bacterial resumption, maybe through ethanol production.

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