Provided herein are methods and systems for loop-mediated isothermal amplification of target polynucleotides on a sample without sample preparation. Methods and systems herein described also allow detection of cells and in particular bacterial cells on an untreated sample comprising the cells, and allow in some embodiments specific detection of bacterial cells such as B. anthracis.
STATEMENT OF GOVERNMENT GRANT
 The United States Government has rights in this invention pursuant to Contract No. DE-AC52-07NA27344 between the U.S. Department of Energy and Lawrence Livermore National Security, LLC, for the operation of Lawrence Livermore National Security.