Portal vein gas and pneumatosis intestinalis: A case of intestinal necrosis caused by acute organophosphorus pesticide poisoning?

Dichlorvos poisoning caused chicken cerebellar autophagy and changes of Caecal microflora

In order to explore the effects of acute dichlorvos exposure on cerebellar autophagy and cecal microbes in broilers and to analyze the relationship between autophagy-related genes and cecal microbes. Broilers were randomly divided into three groups (with 16 broilers in each group)and respectively given distilled water and dichlorvos (2.48 mg / kg, 11.3 mg / kg). The cecal contents and cerebellum samples were collected after poisoning symptoms of broilers, and the antioxidant indexes such as SOD and CAT in cerebellum were detected. Hematoxylin-eosin (HE) staining of cerebellum and cecum, and immunofluorescence sections of cerebellum LC3 were made. RT-PCR and western blot were used to detect the expression of oxidative stress and autophagy-related genes in cerebellar tissue. The cecal contents were analyzed by 16S rRNA high-throughput sequencing, and then the correlation between the expression of autophagy-related genes and the abundance of intestinal microbes was analyzed. It was concluded that dichlorvos exposure destroyed the normal morphological structure of the cerebellum and cecum in broilers, which induced oxidative stress and autophagy in the cerebellum of broilers, reduced the diversity of cecal microorganisms, and destroyed the steady state of the cecal microbial structure. In addition, The changes of mRNA expression of autophagy-related genes is related to some specific bacteria. In summary, this study found that dichlorone exposure can cause cerebellar oxidative stress and autophagy, and the mechanism of cerebellar injury in broilers is linked to cecal microbiota changes, potentially offering a new direction for researching dichlorone's pathogenic mechanism.

Portal vein gas is a sign of intestinal necrosis after pesticide poisoning: a case report

Portal vein gas accumulation and intestinal pneumatosis are uncommon signs indicating a high mortality risk in cases of intestinal ischemic necrosis. However, the widespread use of computed tomography has led to an increase in detection of benign lesions. We report a case of portal vein gas accumulation resulting from organophosphorus pesticide poisoning. A male patient was brought to the hospital in a comatose state with bilateral pupils that measured 1.0 mm, and he showed shortness of breath and wet rattles in the lungs. A cholinesterase concentration of 214 U/L was detected on an auxiliary examination. The patient was diagnosed with organophosphorus pesticide poisoning and underwent mechanical ventilation, hemoperfusion, and continuous renal replacement therapy according to the poisoning guidelines. On the fifth day, considerable abdominal distension was observed. An abdominal computed tomography scan revealed dilation of the small bowel and ascending colon with fluid and gas accumulation, as well as gas within the intestinal wall and hepatic veins. Although portal vein gas and intestinal pneumatosis are a sign of mortality requiring immediate surgical intervention, an increasing number of benign cases suggests potential benefits of conservative treatment approaches.