The invention relates to the detection of
biological materials, and particularly discloses a
rapid detection method based on
CRISPR-Cas13a which is suitable for a specific
nucleic acid fragment in a biological sample. A to-be-detected
nucleic acid fragment is amplified to obtain a transcription product; a
guide RNA (Ribonucleic Acid) is designed by aiming at a target
RNA sequence of a
target gene,and an
RNA molecule is reported by a
signal added in a detection
system; the amplification and read of the
signal are realized by using the
RNA enzymatic activity of the Cas13a
protein, which is activated after recognizing the target
RNA sequence and is not limited by the sequence, further the detection of the
target gene is realized. The detection sensitivity of the method provided by the invention can reach 10 to 18mol / L, namely ammol level, and the specificity can be achieved for detecting the
nucleic acid fragments with single-base difference.