Abstract

Timely diagnosis is a major hurdle in infectious diseases. Diagnosis cannot be awaited for satisfying Koch postulates, there comes the importance of DNA technologies. These methods can also be used for diagnosis of unculturable and non viable organisms rapidly. These methods are easy to be done and automation reduces labor.Applications of DNA technologies for diagnosis of several bacterial diseases are explained in this article

Key words: Diagnosis, bacteria, recombinant DNA, PCR, ligase chain reaction, hybridisation