Summary statistics for drug concentrations in post-mortem femoral blood representing all causes of death

Concentration distributions for 183 drugs and metabolites frequently found in post-mortem (PM) femoral venous blood were statistically characterized based on an extensive database of 122 234 autopsy cases investigated during an 18-year period in a centralized laboratory. The cases represented all causes of death, with fatal drug poisonings accounting for 8%. The proportion of males was 74% with a median age of 58 years compared with 26% females with a median age of 64 years. In 36% of these cases, blood alcohol concentration was higher than or equal to 0.2 parts per thousand, the median being 1.6 parts per thousand. The mean, median, and upper percentile (90th, 95th, 97.5th) drug concentrations were established, as the median PM concentrations give an idea of the "normal" PM concentration level, and the upper percentile concentrations indicate possible overdose levels. A correspondence was found between subsets of the present and the previously published PM drug concentrations from another laboratory that grouped cases according to the cause of death. Our results add to the knowledge for evidence-based interpretation of drug-related deaths.Peer reviewe

Cocaine in surface waters: a new evidence-based tool to monitor community drug abuse

BACKGROUND: Cocaine use seems to be increasing in some urban areas worldwide, but it is not straightforward to determine the real extent of this phenomenon. Trends in drug abuse are currently estimated indirectly, mainly by large-scale social, medical, and crime statistics that may be biased or too generic. We thus tested a more direct approach based on 'field' evidence of cocaine use by the general population. METHODS: Cocaine and its main urinary metabolite (benzoylecgonine, BE) were measured by mass spectrometry in water samples collected from the River Po and urban waste water treatment plants of medium-size Italian cities. Drug concentration, water flow rate, and population at each site were used to estimate local cocaine consumption. RESULTS: We showed that cocaine and BE are present, and measurable, in surface waters of populated areas. The largest Italian river, the Po, with a five-million people catchment basin, steadily carried the equivalent of about 4 kg cocaine per day. This would imply an average daily use of at least 27 ± 5 doses (100 mg each) for every 1000 young adults, an estimate that greatly exceeds official national figures. Data from waste water treatment plants serving medium-size Italian cities were consistent with this figure. CONCLUSION: This paper shows for the first time that an illicit drug, cocaine, is present in the aquatic environment, namely untreated urban waste water and a major river. We used environmental cocaine levels for estimating collective consumption of the drug, an approach with the unique potential ability to monitor local drug abuse trends in real time, while preserving the anonymity of individuals. The method tested here – in principle extendable to other drugs of abuse – might be further refined to become a standardized, objective tool for monitoring drug abuse

Postmortem Analyses Unveil the Poor Efficacy of Decontamination, Anti-Inflammatory and Immunosuppressive Therapies in Paraquat Human Intoxications

studies resulting from human PQ poisonings have assessed the relationship of these therapeutic measures with PQ toxicokinetics and related histopathological lesions, these being the aims of the present study.For that purpose, during 2008, we collected human fluids and tissues from five forensic autopsies following fatal PQ poisonings. PQ levels were measured by gas chromatography-ion trap mass spectrometry. Structural inflammatory lesions were evaluated by histological and immunohistochemistry analysis. The samples of cardiac blood, urine, gastric and duodenal wall, liver, lung, kidney, heart and diaphragm, showed quantifiable levels of PQ even at 6 days post-intoxication. Structural analysis showed diffused necrotic areas, intense macrophage activation and leukocyte infiltration in all analyzed tissues. By immunohistochemistry it was possible to observe a strong nuclear factor kappa-B (NF-κB) activation and excessive collagen deposition.Considering the observed PQ levels in all analyzed tissues and the expressive inflammatory reaction that ultimately leads to fibrosis, we conclude that the therapeutic protocol usually performed needs to be reviewed, in order to increase the efficacy of PQ elimination from the body as well as to diminish the inflammatory process