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1.
Rev Argent Microbiol ; 34(3): 167-70, 2002.
Article in English | MEDLINE | ID: mdl-12415900

ABSTRACT

Enteroaggregative Escherichia coli (EAEC) is an increasingly recognized cause of diarrhea in children in developing and developed countries. EAEC is recognized by a characteristic aggregative pattern of adherence to human epithelial (HEp-2) cells cultured in vitro. This is the gold standard assay. The aggregative phenotype is associated with the presence of a 65 MDa plasmid (pAA) that also encodes several other putative virulence factors, such as the aggregative adherence fimbria I (AAF/I) and the enteroaggregative heat-stable enterotoxin (EAST1). The objective of this work was to evaluate the application of PCR (polymerase chain reaction) to identify EAEC strains in cases of acute diarrhea. A total of 87 E. coli strains, isolated from patients under 2 years of age with acute diarrhea in Mendoza, Argentina, were characterized by the reference method (HEp-2 assay), and by AAF/I- and EAST1-PCR. PCR sensitivity and specificity in comparison with the cell culture assay showed 94.4% sensitivity and 78.26% specificity. EAST1- and AAF/I-PCR could be recommended as a screening test, applicable to epidemiologic studies.


Subject(s)
Bacterial Adhesion , Diarrhea, Infantile/microbiology , Escherichia coli Infections/microbiology , Escherichia coli/isolation & purification , Argentina/epidemiology , Bacterial Toxins/genetics , Enterotoxins/genetics , Epithelial Cells/microbiology , Escherichia coli/pathogenicity , Fimbriae Proteins/genetics , Fimbriae, Bacterial/genetics , Humans , Infant , Mass Screening , Phenotype , Plasmids , Polymerase Chain Reaction , Sensitivity and Specificity , Tumor Cells, Cultured/microbiology , Virulence
2.
Rev. argent. microbiol ; 34(3): 167-170, jul.-sept. 2002.
Article in English | LILACS | ID: lil-331787

ABSTRACT

Enteroaggregative Escherichia coli (EAEC) is an increasingly recognized cause of diarrhea in children in developing and developed countries. EAEC is recognized by a characteristic aggregative pattern of adherence to human epithelial (HEp-2) cells cultured in vitro. This is the gold standard assay. The aggregative phenotype is associated with the presence of a 65 MDa plasmid (pAA) that also encodes several other putative virulence factors, such as the aggregative adherence fimbria I (AAF/I) and the enteroaggregative heat-stable enterotoxin (EAST1). The objective of this work was to evaluate the application of PCR (polymerase chain reaction) to identify EAEC strains in cases of acute diarrhea. A total of 87 E. coli strains, isolated from patients under 2 years of age with acute diarrhea in Mendoza, Argentina, were characterized by the reference method (HEp-2 assay), and by AAF/I- and EAST1-PCR. PCR sensitivity and specificity in comparison with the cell culture assay showed 94.4 sensitivity and 78.26 specificity. EAST1- and AAF/I-PCR could be recommended as a screening test, applicable to epidemiologic studies.


Subject(s)
Humans , Infant , Bacterial Adhesion , Diarrhea, Infantile , Escherichia coli , Escherichia coli Infections/microbiology , Argentina , Bacterial Toxins , Epithelial Cells/microbiology , Enterotoxins , Escherichia coli , Fimbriae, Bacterial , Mass Screening , Phenotype , Plasmids , Polymerase Chain Reaction , Fimbriae Proteins/genetics , Sensitivity and Specificity , Tumor Cells, Cultured , Virulence
3.
Rev. argent. microbiol ; 34(3): 167-170, July-Sept. 2002.
Article in English | BINACIS | ID: bin-6789

ABSTRACT

Enteroaggregative Escherichia coli (EAEC) is an increasingly recognized cause of diarrhea in children in developing and developed countries. EAEC is recognized by a characteristic aggregative pattern of adherence to human epithelial (HEp-2) cells cultured in vitro. This is the gold standard assay. The aggregative phenotype is associated with the presence of a 65 MDa plasmid (pAA) that also encodes several other putative virulence factors, such as the aggregative adherence fimbria I (AAF/I) and the enteroaggregative heat-stable enterotoxin (EAST1). The objective of this work was to evaluate the application of PCR (polymerase chain reaction) to identify EAEC strains in cases of acute diarrhea. A total of 87 E. coli strains, isolated from patients under 2 years of age with acute diarrhea in Mendoza, Argentina, were characterized by the reference method (HEp-2 assay), and by AAF/I- and EAST1-PCR. PCR sensitivity and specificity in comparison with the cell culture assay showed 94.4 sensitivity and 78.26 specificity. EAST1- and AAF/I-PCR could be recommended as a screening test, applicable to epidemiologic studies.(AU)


Subject(s)
Humans , Infant , Bacterial Adhesion , Diarrhea, Infantile/microbiology , Escherichia coli/isolation & purification , Escherichia coli Infections/microbiology , Argentina/epidemiology , Bacterial Toxins/genetics , Enterotoxins/genetics , Epithelial Cells/microbiology , Escherichia coli/pathogenicity , Fimbriae Proteins/genetics , Fimbriae, Bacterial/genetics , Mass Screening , Phenotype , Plasmids , Polymerase Chain Reaction , Sensitivity and Specificity , Tumor Cells, Cultured/microbiology , Virulence
4.
Rev. argent. microbiol ; 34(3): 167-70, 2002 Jul-Sep.
Article in English | BINACIS | ID: bin-39112

ABSTRACT

Enteroaggregative Escherichia coli (EAEC) is an increasingly recognized cause of diarrhea in children in developing and developed countries. EAEC is recognized by a characteristic aggregative pattern of adherence to human epithelial (HEp-2) cells cultured in vitro. This is the gold standard assay. The aggregative phenotype is associated with the presence of a 65 MDa plasmid (pAA) that also encodes several other putative virulence factors, such as the aggregative adherence fimbria I (AAF/I) and the enteroaggregative heat-stable enterotoxin (EAST1). The objective of this work was to evaluate the application of PCR (polymerase chain reaction) to identify EAEC strains in cases of acute diarrhea. A total of 87 E. coli strains, isolated from patients under 2 years of age with acute diarrhea in Mendoza, Argentina, were characterized by the reference method (HEp-2 assay), and by AAF/I- and EAST1-PCR. PCR sensitivity and specificity in comparison with the cell culture assay showed 94.4


sensitivity and 78.26


specificity. EAST1- and AAF/I-PCR could be recommended as a screening test, applicable to epidemiologic studies.

5.
Rev Esp Fisiol ; 38(1): 47-52, 1982 Mar.
Article in Spanish | MEDLINE | ID: mdl-7100604

ABSTRACT

Variations of serum zinc and copper in relation with iron absorption, in a group of dogs undergoing pancreatic duct ligation, have been studied. Mean plasma iron concentrations, total serum zinc and copper were determined after administration of an iron dose (60 mg FeSO4 . 4H2O, pH 4). Significant increase of serum zinc and plasma iron was observed. In copper experiments no significant results were found.


Subject(s)
Ferrous Compounds/administration & dosage , Iron/administration & dosage , Pancreas/physiology , Zinc/blood , Animals , Copper/blood , Dogs , Iron/blood , Pancreatic Ducts
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