Similarly, DNA probes, which are even more sensitive than monoclonal antibodies, will, however, take hours (not minutes as in monoclonal antibodies) instead of weeks. Readymade DNA probes for herpes virus and other human, animal and plant viruses are being prepared.
DNA probe kits are also available to help preparation of DNA probes and a market of DNA probes for several hundred million dollars (> $500,000,000) per year is now available. This market will expand and grow in future.

The diagnostic methods at the DNA level have the advantage over other methods, since in these methods genes of the parasite are examined and not the expressed product which changes in different stages of the life cycle of the parasite and also due to the environment.

In the above use of DNA probes, DNA has to be radioactively labeled, which is not very safe in field study. Therefore, techniques for non radioactive labelling of probes, methods for quick preparation of target DNA and suitable protocols for hybridization are being developed. This in future will allow quick diagnosis of parasites in the field.