Direct PCR amplification and sequencing of specimens' DNA from preservative ethanol

Direct PCR amplification and sequencing of specimens' DNA from preservative ethanol.

DNA extraction is the first step in many molecular biology protocols. However, we hypothesized that DNA from a preserved specimen can leak into its preservative medium, allowing the medium itself to be directly PCR-amplified. We successfully tested this idea on mescal-the alcoholic beverage famous for the "worm" (a caterpillar) that is placed in the bottle of many brands-and indeed obtained amp...

Molecular diagnosis of infective endocarditis by PCR amplification and direct sequencing of DNA from valve tissue.

We used broad-range eubacterial PCR amplification followed by direct sequencing to identify microbial pathogens in heart valve material from 29 patients with histologically confirmed infective endocarditis and 23 patients free of infective endocarditis. Microorganisms cultured by conventional techniques matched those identified by PCR in 21 cases. PCR alone identified the causative agent in thr...

Amplification of coccidioidal DNA in clinical specimens by PCR.

Coccidioides DNA was amplified from serum by a PCR using coccidioid-specific primers. A 239-bp product was visualized when 10 fg of exogenous coccidioidal DNA was subjected to amplification. This product was demonstrated in some human and mouse sera prior to the detection of coccidioidal antibodies.

Amplification of Coccidioidal DNA in Clinical Specimens by PCR

Enhanced DNA extraction and PCR amplification of mitochondrial genes from formalin-fixed museum specimens.