Detection of E. coli O157:H7 and Shigella dysenteriae toxins in clinical samples by PCR-ELISA
Shiga toxin producing bacteria are potential causes of serious human disease such as hemorrhagic colitis, severe inflammations of ileocolonic regions of gastrointestinal tract, thrombocytopenia, septicemia, malignant disorders in urinary ducts, hemolytic uremic syndrome (HUS). Shiga toxin 1 (stx1),...
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doaj-2519c3b147e04944b8d48596d0496fd82020-11-25T03:01:45ZengElsevierBrazilian Journal of Infectious Diseases1413-86702015-05-01193278284S1413-86702015000300278Detection of E. coli O157:H7 and Shigella dysenteriae toxins in clinical samples by PCR-ELISAJafar Amani0Askary Ahmadpour1Abbas Ali Imani Fooladi2Shahram Nazarian3Applied Microbiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, IranApplied Microbiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, IranApplied Microbiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran; Corresponding author at: Applied Microbiology Research Center, Baqiyatallah University of Medical Sciences, Vanak Sq. Molasadra St., P.O. Box 19395-5487, Tehran, Iran.Imam Hossain University, Faculty of Science, Department of Biology, Tehran, IranShiga toxin producing bacteria are potential causes of serious human disease such as hemorrhagic colitis, severe inflammations of ileocolonic regions of gastrointestinal tract, thrombocytopenia, septicemia, malignant disorders in urinary ducts, hemolytic uremic syndrome (HUS). Shiga toxin 1 (stx1), shiga toxin 2 (stx2), or a combination of both are responsible for most clinical symptoms of these diseases. A lot of methods have been developed so far to detect shiga toxins such as cell culture, ELISA, and RFPLA, but due to high costs and labor time in addition to low sensitivity, they have not received much attention. In this study, PCR-ELISA method was used to detect genes encoding shiga toxins1 and 2 (stx1 and stx2). To detect stx1 and stx2 genes, two primer pairs were designed for Multiplex-PCR then PCR-ELISA. PCR products (490 and 275, respectively) were subsequently verified by sequencing. Sensitivity and specificity of PCR-ELISA method were determined by using genome serial dilution and Enterobacteria strains. PCR-ELISA method used in this study proved to be a rapid and precise approach to detect different types of shiga toxins and can be used to detect bacterial genes encoding shiga toxins. Keywords: Shigella dysenteriae, E.coli O157:H7, PCR-ELISA, Diagnostic methodshttp://www.sciencedirect.com/science/article/pii/S1413867015000793 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jafar Amani Askary Ahmadpour Abbas Ali Imani Fooladi Shahram Nazarian |
spellingShingle |
Jafar Amani Askary Ahmadpour Abbas Ali Imani Fooladi Shahram Nazarian Detection of E. coli O157:H7 and Shigella dysenteriae toxins in clinical samples by PCR-ELISA Brazilian Journal of Infectious Diseases |
author_facet |
Jafar Amani Askary Ahmadpour Abbas Ali Imani Fooladi Shahram Nazarian |
author_sort |
Jafar Amani |
title |
Detection of E. coli O157:H7 and Shigella dysenteriae toxins in clinical samples by PCR-ELISA |
title_short |
Detection of E. coli O157:H7 and Shigella dysenteriae toxins in clinical samples by PCR-ELISA |
title_full |
Detection of E. coli O157:H7 and Shigella dysenteriae toxins in clinical samples by PCR-ELISA |
title_fullStr |
Detection of E. coli O157:H7 and Shigella dysenteriae toxins in clinical samples by PCR-ELISA |
title_full_unstemmed |
Detection of E. coli O157:H7 and Shigella dysenteriae toxins in clinical samples by PCR-ELISA |
title_sort |
detection of e. coli o157:h7 and shigella dysenteriae toxins in clinical samples by pcr-elisa |
publisher |
Elsevier |
series |
Brazilian Journal of Infectious Diseases |
issn |
1413-8670 |
publishDate |
2015-05-01 |
description |
Shiga toxin producing bacteria are potential causes of serious human disease such as hemorrhagic colitis, severe inflammations of ileocolonic regions of gastrointestinal tract, thrombocytopenia, septicemia, malignant disorders in urinary ducts, hemolytic uremic syndrome (HUS). Shiga toxin 1 (stx1), shiga toxin 2 (stx2), or a combination of both are responsible for most clinical symptoms of these diseases. A lot of methods have been developed so far to detect shiga toxins such as cell culture, ELISA, and RFPLA, but due to high costs and labor time in addition to low sensitivity, they have not received much attention. In this study, PCR-ELISA method was used to detect genes encoding shiga toxins1 and 2 (stx1 and stx2). To detect stx1 and stx2 genes, two primer pairs were designed for Multiplex-PCR then PCR-ELISA. PCR products (490 and 275, respectively) were subsequently verified by sequencing. Sensitivity and specificity of PCR-ELISA method were determined by using genome serial dilution and Enterobacteria strains. PCR-ELISA method used in this study proved to be a rapid and precise approach to detect different types of shiga toxins and can be used to detect bacterial genes encoding shiga toxins. Keywords: Shigella dysenteriae, E.coli O157:H7, PCR-ELISA, Diagnostic methods |
url |
http://www.sciencedirect.com/science/article/pii/S1413867015000793 |
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