Organophosphate use represents one of the main causes of intentional and accidental poisoning in Brazil. Because they induce alteration in carcass decomposition and succession of necrophagous Diptera, they are important investigative tool in forensic entomology for determining the postmortem interval (PMI) and cause of death. Thus, this work aimed to evaluate the influence of Terbufos, the most commonly used organophosphate for suicides in Rio Grande do Norte, Brazil, in the decomposition process and necrophagous fly assemblies in intoxicated rat carcasses. For this, 150g female Wistar rats received, by gavage, 200µL of Terbufos (5mg/kg or 10mg/kg) or distilled water (control). Approximately 30 minutes after administration, animals were euthanized and distributed in suspended traps to decompose under environmental conditions. Decomposition was monitored daily, with photographic record and collection of the visiting dipterofauna until the dry phase. Data show that the higher dose of Terbufos i) accelerates carcass decomposition in 24h; ii) decreases the species richness and abundance of scavengers flies when compared to the control; iii) changes the succession pattern, delaying the arrival of important species for the PMI estimate and iv) causes 8% mortality of the visiting dipterofauna. This work provides relevant information about dipteran assemblages and changes in the cadaver decomposition process associated with Terbufos intoxication, which may assist in future investigative processes with suspected organophosphate poisoning.

在巴西，有机磷的使用是故意和意外中毒的主要原因之一。由于它们诱导尸体尸体分解和食虫双翅目的变化，因此它们是法医昆虫学中确定死后间隔（PMI）和死亡原因的重要调查工具。因此，这项工作旨在评估Terbufos，这是巴西北里奥格兰德州最常使用的有机磷酸酯作为自杀物质，对陶醉的大鼠尸体的分解过程和食虫蝇组件产生影响。为此，150g女性Wistar通过管饲法，大鼠接受200μLTerbufos（5mg / kg或10mg / kg）或蒸馏水（对照）。给药后约30分钟，对动物实施安乐死并分配到悬浮的诱捕器中，以在环境条件下分解。每天监测分解情况，并记录下摄影记录并收集来访的双翅类动物直到干phase。数据显示，较高剂量的Terbufos i）在24h内可加速car体分解。ii）与对照相比，减少了清道夫果蝇的物种丰富度和丰度；iii）改变演替模式，延迟重要物种的到达PMI估计值，并且iv）造成来访双翅类动物8％的死亡率。