Journal of Forensic Medicine ›› 2025, Vol. 41 ›› Issue (5): 477-481.DOI: 10.12116/j.issn.1004-5619.2025.450301

• Topic on Microbiomics • Previous Articles    

Diagnosis of Drowning by qPCR Detection of Plankton DNA in Cardiac Blood of Cadavers

Xiao-feng ZHANG1(), Lin CHEN1, Xiao-hui CHEN2, Jian ZHAO2, Tian-chun LIN3, Dang-en GU3, Feng WANG3, Zhi-yong LIU2, Shi-yun MENG4, Xing-yi YANG2, Qu-yi XU2()   

  1. 1.School of Forensic Medicine, Southern Medical University, Guangzhou 510515, China
    2.Guangzhou Forensic Science Institute & Key Laboratory of Forensic Pathology, Ministry of Public Security, Guangzhou 510442, China
    3.Huadu District Branch of Guangzhou Public Security Bureau, Guangzhou 510800, China
    4.Faculty of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
  • Received:2025-03-03 Online:2026-01-27 Published:2025-10-25
  • Contact: Qu-yi XU

Abstract:

Objective To investigate the feasibility of diagnosing drowning by detecting plankton DNA in cardiac blood of cadavers recovered from water using real-time quantitative PCR (qPCR). Methods Cardiac blood samples were collected via precordial puncture from 32 drowned cadavers and 10 non-drowned cadavers. qPCR was employed to detect plankton (diatoms, cyanobacteria and Aeromonas) in the blood samples. Results Plankton DNA was detected in 17 drowning cadavers, while no plankton DNA was detected in the 10 non-drowned cadavers. Conclusion qPCR can detect plankton DNA in cardiac blood of most drowning cases. This method may have potential as an auxiliary tool in the diagnosis of drowning.

Key words: forensic pathology, drowning, real-time quantitative PCR, cardiac blood, plankton

CLC Number: