tetracycline and Cadaver

Animal carcass decay produces many poisonous metabolites and chemical pollutants, which pose potential ecological risks to the aquatic environment and human health. However, the effects of animal cadaver decomposition on high-risk antibiotic resistance genes (ARGs) and potential pathogens in different water types are still unknown. In this study, fifteen freshwater economic fish (Carassius auratus) corpses were put into three types of water (i.e., pond water, tap water, and domestic sewage) for a 100-day decomposition. Next generation sequencing and HT-qPCR were used to illustrate how corpse decomposition affected microbial communities and ARG profiles. Our results revealed that fish corpse degradation caused similar resistomes and microbiome in different water types. MLSB (Macrolide-Lincosamide-Streptogramin B), β-lactamase, sulfonamide, tetracycline resistance genes and transposase genes in the experimental groups were increased. Among them, tetracycline resistance genes were enriched by 224 to 136,218-fold during the process of corpse degradation. Furthermore, high-risk ARGs (ermB, floR and dfrA1), which resist to MLSB, multidrug and sulfonamide respectively, were significantly enriched in the cadaver groups and had co-occurrence patterns with opportunistic pathogens, such as Bacteroidetes, which was more than 37 times in carcass groups than that in control groups. The study is able to draw a general conclusion that cadaver decomposition of freshwater economic fish deteriorates the aquatic environment by affecting high-risk ARGs and pathogenic microorganisms regardless of water types, which poses potential threats to human health. Therefore, timely management and treatment of animal carcasses is of great significance to the protection of water environment.

Topics: Animals; Anti-Bacterial Agents; Cadaver; Drug Resistance, Microbial; Fishes; Fresh Water; Genes, Bacterial; Humans; Sulfonamides; Tetracycline; Water

Some ubiquitous soil-living micro-organisms are producing tetracycline-like fluorescences in skeletal remains. For this reason, the possibility of using tetracycline fluorescences in dating or allocating displaced skeletal parts is severely limited.

Topics: Bone and Bones; Cadaver; Fluorescence; Forensic Medicine; Humans; Soil Microbiology; Stachybotrys; Tetracycline

Topics: Adolescent; Adult; Ampicillin; Azathioprine; Bacteriuria; Cadaver; Female; Glomerulonephritis; Humans; Immunosuppression Therapy; Kidney Failure, Chronic; Kidney Transplantation; Male; Middle Aged; Nephrectomy; Polycystic Kidney Diseases; Prednisone; Pyelonephritis; Recurrence; Tetracycline; Transplantation, Homologous; Ureteral Obstruction; Urinary Catheterization; Urinary Tract Infections