Nucleic acid diagnostic approaches in parasitology.

Nucleic acid diagnostic technologies are partly replacing traditional microscopy and antigen detection methods in parasitological diagnostics. In particular, the diagnostics of parasitic diarrhea is undergoing a transformation due to the application of polymerase chain reaction (PCR) tests. Diagnostics of malaria is still based on microscopy, but rapid nucleic acid tests are emerging. Laboratories of clinical microbiology in Finland currently provide PCR tests e.g. for intestinal protozoa, Toxoplasma and Trichomonas. Nucleic acid diagnostic methods are superior in specificity and sensitivity, but may give false positive results after a treated infection.