Towards the identification of body fluids using RT-LAMP isothermal amplification coupled with CRISPR-Cas12a.

While often necessary in sexual assault cases, confirmatory identification of body fluids can be a lengthy and/or costly process. In particular, the detection of vaginal fluid and menstrual fluid in forensic casework is limited to endpoint reverse-transcription PCR to detect fluid-specific messenger RNA (mRNA) markers as there are no robust chemical or enzymatic techniques available for these fluids. Similarly, testing for rectal mucosa is not possible with standard methods, the presence of which would provide probative value in cases of alleged anal penetration, although mRNA-based markers have recently been described.