Detection of Brucella species using nucleic acid techniques requires efficient unbiased DNA extraction procedures. In this study, we compared six protocols for DNA isolation from pure culture of Brucella melitenses 16M and the efficiency of different extraction processes were evaluated using Polymerase Chain Reaction (PCR).These protocols included boiling, the use of CTAB phenol chloroform extr...

More than 700 bacterial species inhabit oral cavity of humans. Various oral diseases are related to changes in the structure of this complex community. Their pathogenesis can, thus, be better understood by study of oral microbial flora. As many bacteria are refractory to cultivation, molecular approaches based on PCR followed by downstream analysis are more suitable for community analysis than ...

Inorganic Cr(III) and Cr(VI) have contrasting biological, geochemical and toxicology effects. Cr(III) is considered as an essential species for the proper functioning of living organisms but Cr(VI) is toxic for the biological systems. An off-line speciation method using Chelex-100 has been practiced for speciation to Cr(III) and Cr(VI) from surface waters of rivers. The underlying principal of ...

BACKGROUND Few studies comparing multiple methods for DNA extraction from dried blood spots (DBS) on filter paper for PCR targeting the Plasmodium genome have been done. METHODS Frequently-used methods for DNA extraction from DBS using Chelex-100, InstaGene Matrix, QIAamp DNA Mini Kit and TE buffer were compared on a dilution series of a standardized Plasmodium falciparum positive sample. The...

Feces-based population genetic studies have become increasingly popular. However, polymerase chain reaction (PCR) amplification rates from fecal material vary depending on the species, populations, loci, and extraction protocols. Here, we assessed the PCR amplification success of three microsatellite markers and a segment of the mitochondrial control region of DNA extracted from field-collected...

BACKGROUND Dried blood spots (DBS) are a convenient and inexpensive method for biobanking. Although many countries have established population-based DBS biobanks from neonatal screening programs, the quality and usefulness of DNA from DBS have not been extensively assessed. METHODS We compared 4 common DNA extraction methods (Qiagen, EZNA, Chelex 100, and alkaline lysis) in a pilot study usin...

A polymerase chain reaction-based DNA typing method, amplified fragment length polymorphism (AMP-FLP) analysis, has shown promise as a means of analyzing forensic biological evidence. A variety of DNA extraction methods were evaluated for their suitability for AMP-FLP analysis. Factors that were considered in the evaluation included DNA yield, ability of DNA to be amplified, the presence of DNA...

DNA extraction from paraffin-embedded tissue (PET) is a critical step for many molecular techniques. Several protocols have been carried out for this objective according to the literature. In the present study, the performances of three DNA extraction methods from PET were compared to establish the optimal protocol for our laboratory. Ten lymph nodes from ten patients dying of AIDS were investi...

Simple sample-processing methods for PCR detection of Porphyromonas gingivalis, a major pathogen causing adult periodontitis, from saliva were studied. The ability to detect P. gingivalis from 118 salivary samples by PCR after boiling and Chelex 100 processing was compared with bacterial culture. P. gingivalis was detected three times more often by PCR than by culture. Chelex 100 processing of ...