Abundance of Lactobacillus in porcine gut microbiota is closely related to immune response following PRRSV immunization.

Increasing evidence shows that gut microbiota plays a critical role in host immune system development and immune regulation, thus the composition of gut microbiota may affect how individuals respond to immunizations. Currently, little evidence is available on the correlation between porcine gut microbiota and vaccine immune response. Here, we investigated the influence of gut microbiota on immune response in pigs to porcine reproductive and respiratory syndrome virus (PRRSV) vaccine. Based on the antibody levels for PRRSV, the immunized pigs were divided into three groups (high, low, and others), and followed by virulent PRRSV challenge. The comprehensive analysis of microbial composition revealed that gut microbiota was similar in the richness and diversity among different groups before immunization. After immunization, the richness and diversity of gut microbial community in the high group were still similar to the low group, although there was a decrease in community diversity overtime. Interestingly, the antibody titer was positively correlated with the abundance of Lactobacillus in gut microbiota in immunized pigs. Further analysis indicated that gut microbial composition might be correlated to the clinical parameters such as body weight and rectal temperature after virus challenge. Taken together, our findings suggest that certain specific members of gut microbiota, such as Lactobacillus may serve as a mechanism for regulating the immune response following immunization in pigs.

Effect comparison of three different types of transanal drainage tubes after anterior resection for rectal cancer.

BACKGROUND: Anastomotic leakage (AL) is one of the most severe early complications after rectal cancer surgery. Many studies and meta-analysis results show that the indentation of transanal drainage tubes (TDT) can prevent and reduce the incidence of AL. However, the size and material of drainage tubes are rarely reported. Herein, we compare the effect of three kinds of TDT and analyze the use of TDT material and size to prevent AL, which may better prevent the occurrence of AL. METHODS: The clinical data of 182 patients who underwent laparoscopic anterior resection of rectal cancer were retrospectively analyzed between January 2016 and March 2019. According to the types of indwelling TDT after the operation, they were divided into Fr32 silicone tubes (81 cases), Fr24 silicone tubes (54 cases), Fr24 latex tubes (47 cases). The first drainage, exhaust, defecation, abdominal distension and anastomotic leakage of the patients with three different types of TDT were compared. RESULTS: There was no significant difference in the degree of first exhaust, abdominal distension and anastomotic leakage among three different types of TDT; the time of first drainage and defecation of the Fr32 silicone tube was significantly earlier than that of Fr24 silicone tube and Fr24 latex tube. CONCLUSION: The drainage effect of the Fr32 silicone tube is better than that of Fr24 silicone tube and Fr24 latex tube after anterior resection for rectal cancer, Fr32 silicone may better prevent the occurrence of AL, but randomized controlled studies are needed.