Influence of Paraquat on Chrysomya megacephala (Fabricius) (Diptera: Calliphoridae) Infesting Minced-beef Substrates in Kelantan, Malaysia

This study investigated the influence of paraquat, a prevalent poison used by suicides, on initial oviposition and development of Chrysomya megacephala (Fabricius) using minced‐beef substrates. Paraquat in lethal dose for human (40 mg/kg), two times the lethal dose (80 mg/kg) and five times the leth...

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Bibliographic Details
Published in:Journal of forensic sciences 2014-03, Vol.59 (2), p.529-532
Main Authors: Mahat, Naji A., Yin, Chu L., Jayaprakash, Paul T.
Format: Article
Language:English
Subjects:
Animals
Beef
Cattle
Chrysomya megacephala
Diptera - drug effects
Diptera - physiology
Feeding Behavior - physiology
forensic entomology
forensic science
Forensic sciences
Herbicides - toxicity
Larva - drug effects
Larva - growth & development
Malaysia
Meat
Oviposition - drug effects
oviposition and development
paraquat
Paraquat - toxicity
Poisoning
postmortem interval
Pupa - drug effects
Pupa - growth & development
Suicides & suicide attempts
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Summary:This study investigated the influence of paraquat, a prevalent poison used by suicides, on initial oviposition and development of Chrysomya megacephala (Fabricius) using minced‐beef substrates. Paraquat in lethal dose for human (40 mg/kg), two times the lethal dose (80 mg/kg) and five times the lethal dose (200 mg/kg) were mixed thoroughly with respective minced‐beef substrates (1 kg each) that were decomposed in a shaded habitat fully protected from rain. Results of four replications of the above experiment revealed that the presence of paraquat neither delayed initial oviposition nor prolonged the developmental stages of C. megacephala. Therefore, estimation of postmortem interval (PMI) based on empirical baseline data obtained using animal models devoid of any poisons would still be appropriate for estimating PMI in paraquat‐related deaths.
ISSN:0022-1198
1556-4029
DOI:10.1111/1556-4029.12355