Methods and reagents for the detection of Salmonella spp

a technology of reagents and methods, applied in the field of methods and reagents for the detection of i > salmonella /i > spp, can solve the problems of too slow to be used systematically in a large number of samples

Inactive Publication Date: 2013-07-16
UNIV DEL PAIS VASCO EUSKAL HERRIKO UNIBERTSITATEA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these procedures are efficient, they are too slow to be used systematically in a large number of samples.

Method used

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Examples

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Detection of DNA and RNA of Salmonella spp. in Food

A. Protocol for the Detection of DNA of Salmonella spp.

1. Extraction with CHELEX® 100-6%

[0096]CHELEX 100-6% resin was prepared by means of resuspending 1.5 grams of Chelex 100 in 25 ml of bidistilled water and maintaining under moderated stirring. The Chelex 100-6% solution was preserved at 4° C.

[0097]For extracting the DNA from Salmonella spp., the samples were centrifuged with 1 ml of pre-enriched culture in a 1.5 ml Eppendorf tubes for 5 minutes at 13,000 rpm. The supernatant was removed with a pipette and the pellet was resuspended in 300 μl of CHELEX 100-6, using a vortex. The samples were incubated at 56° C. for 15-20 minutes and stirred using a vortex for 10 seconds. The samples were incubated in a bath at 100° C. for 5 minutes, mixed using a vortex for 10 seconds and the tubes were immediately transferred to ice. The samples were centrifuged for 5 minutes at 13,000 rpm. 200 μl of supernatant (containing DNA) were transferred...

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Abstract

The invention relates to an in vitro method for the detection of bacteria of the Salmonella spp. genus by means of a quantitative polymerase chain reaction using specific primers for the pathogen from DNA and RNA samples from the microorganism. The method is useful in the detection of viable and non-viable microorganisms of Salmonella spp. in environmental, clinical and food samples. Likewise, the invention also relates to a kit used for putting the method into practice.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is the U.S. national phase of PCT / ES2009 / 070121 filed Apr. 28, 2009, which claims priority of Spanish Patent Application No. P200801267 filed Apr. 30, 2008.FIELD OF THE INVENTION[0002]The invention relates to an in vitro method for the detection of bacteria of the Salmonella spp. genus by means of a quantitative polymerase chain reaction using specific primers for said pathogen from DNA and RNA samples from said microorganism. Said method is useful in the detection of viable and non-viable microorganisms of Salmonella spp. in environmental, clinical and food samples. Likewise, the invention also relates to a kit for putting said method into practice.BACKGROUND[0003]Salmonellosis is one of the most common and wide spread food diseases caused by bacteria of the Salmonella spp. genus. It has been estimated that Salmonella spp. is responsible for more than 1.4 million cases of enterocolitis and more than 500 deaths per year i...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): C12Q1/68C12P19/34C07H21/04
InventorGARAIZAR CANDINA, JAVIERREMENTERIA RUIZ, AITORBIKANDI BIKANDI, JOSEBALOPITZ OTSOA, FERNANDOMARTINEZ BALLESTEROS, ILARGIPEREZ AGUIRRE, FERNANDOSANTAOLALLA RUIZ DE GALARRETA, ISABEL
OwnerUNIV DEL PAIS VASCO EUSKAL HERRIKO UNIBERTSITATEA