Tsetse fly universal detection primer pair and digital PCR detection method

CN121852578BActive Publication Date: 2026-06-09INST OF PATHOGEN BIOLOGY CHINESE ACADEMY OF MEDICAL SCI

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF PATHOGEN BIOLOGY CHINESE ACADEMY OF MEDICAL SCI
Filing Date
2026-03-18
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing trypanosome detection methods, such as traditional PCR and real-time quantitative PCR, are insufficient in sensitivity and accuracy, making it difficult to effectively detect very early or low parasitemia. They are also susceptible to interference from inhibitors in the sample. Digital PCR lacks specially optimized primer pairs, leading to false negative or false positive results.

Method used

Two primer pairs specifically amplifying the conserved regions of the Trypanosoma 18S rRNA gene were designed, and the digital PCR reaction system, including annealing temperature and primer concentration, was optimized to establish a highly sensitive and absolutely quantitative detection method.

Benefits of technology

It achieves highly sensitive detection of Trypanosoma, accurately identifying it at extremely low copy numbers, and is suitable for the diagnosis of Trypanosoma infection with very low viral load or early infection, reducing the risk of false positives. It is applicable to the detection of whole blood and purified DNA samples.

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Abstract

The application belongs to the technical field of molecular biology and medical detection, and discloses a trypanosoma universal detection primer pair and a digital PCR detection method. Two pairs of high-specificity universal primers are designed based on the 18S rRNA sequence highly conserved among trypanosoma species, and the sequences are shown in SEQ ID NO: 1-2 or SEQ ID NO: 12-13. Meanwhile, an optimized digital PCR detection method is provided, and the sensitivity and specificity of detection are significantly improved by accurately optimizing key parameters such as annealing temperature and primer concentration. It is verified through experiments that the system can stably detect whole blood simulation samples containing trypanosoma as low as 5 per milliliter or trypanosoma samples containing DNA as low as 0.01 pg (single reaction system), and the detection limit can reach the single copy level. The application provides a powerful technical tool for early diagnosis of trypanosomiasis, precise medication guidance and epidemiological monitoring.
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