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The human intestine is colonized by a variety of microbes that influence the metabolic responses, the immune system and the nervous system. Dietary patterns are important factors that shape the composition of the gut microbiota. Many animal models of alcohol exposure have highlighted the key role of the alcohol-induced gut microbiota alterations, leaky gut and translocation of microbial products in the development of alcoholic liver disease (ALD). However, in humans, there is no clear picture defining an "alcoholic microbiome", and the link between intestinal dysbiosis and ALD development is far from being understood. Although we do not comprehend all the mechanistic insights, clinical studies aiming at modulating the gut microbiota of alcoholic patients have shown some beneficial effects. Here we review the potential therapeutic effects of probiotics in ALD and give some clinical perspectives on the role of prebiotics and the use of fecal microbiota transplantation.

The coronavirus disease 2019 (COVID-19) is a pandemic infection spreading worldwide at an unprecedented rate. Our aim was to assess the frequency of gastrointestinal (GI) involvement in COVID-19.

We performed a systematic review and meta-analysis of all studies reporting clinical data about COVID-19 patients, published until 25th March 2020. The primary endpoint was the pooled prevalence of COVID-19 patients complaining of GI symptoms. Secondary endpoints were the pooled prevalence of cases with COVID-19 positive stool samples, and of asymptomatic COVID-19 patients. We used random-effects model for meta-analysis.

Thirty-three studies were included in the meta-analysis. Out of 4434 COVID-19 patients, the pooled prevalence of GI manifestations was 11.51% (95% CI 8.16 to 15.35). The most frequent GI symptom was diarrhea (7.78% of cases ; 95% CI 5.05 to 11.04), followed by nausea/vomiting (3.57% ; 95% CI 1.87 to 5.80), poor appetite (2.39% ; 95%CI 0.55 ; 5.46) and abdominal pain (0.78% ; 95% CI 0.26 to 1.57). Positivity for COVID-19 in stool samples was observed in 41.50% (95% CI 17.70 to 67.65) of cases. 11.85% (95% CI 3.53 to 24.17) of COVID-19 patients remained asymptomatic.

The present meta-analysis shows that a significant proportion of COVID-19 patients suffer from GI manifestations, as well as COVID-19 positivity in stool samples. Asymptomatic patients need to be considered a further potential route of viral transmission.

The present meta-analysis shows that a significant proportion of COVID-19 patients suffer from GI manifestations, as well as COVID-19 positivity in stool samples. Asymptomatic patients need to be considered a further potential route of viral transmission.

Endoscopic retrograde cholangiopancreatography (ERCP) is an invasive modality, and has a high risk of causing post-ERCP pancreatitis (PEP). Risk factors of PEP have been investigated and conflicting results are present for most risk factors. The aim of this study was to evaluate the risk factors for PEP and to determine whether the risk factors differ due to the ERCP indication.

A retrospective study was conducted which included 666 patients with 968 ERCP procedures. Some risk factors were evaluated for PEP, and they were also evaluated separately for patients with bile duct stones and patients who underwent ERCP for other reasons than bile duct stones.

In patients with bile duct stones detected on ERCP ; female gender, lower diameter of the common bile duct, placing a biliary plastic stent and not having a cholecystectomy history were risk factors for PEP, whereas in patients without bile duct stones the only risk factor for PEP was not having a prior endoscopic sphincterotomy.

Our study revealed that PEP risk factors depend on the indication of ERCP. To the best of our knowledge our study is the first study defining cholecystectomy as a protective factor for PEP in patients with bile duct stones and endoscopic sphincterotomy history as a protective factor for PEP in patients without bile duct stones. Our study also showed that female gender, lower diameter of the common bile duct and placing a plastic biliary stent were risk factors for PEP in patients with bile duct stones.

Our study revealed that PEP risk factors depend on the indication of ERCP. CDK and cancer To the best of our knowledge our study is the first study defining cholecystectomy as a protective factor for PEP in patients with bile duct stones and endoscopic sphincterotomy history as a protective factor for PEP in patients without bile duct stones. Our study also showed that female gender, lower diameter of the common bile duct and placing a plastic biliary stent were risk factors for PEP in patients with bile duct stones.

To evaluate the variability in the enhancement of pancreas on computed tomography (CT) in patients with acute pancreatitis (AP) and isolated extrapancreatic necrosis (EPN) and to investigate whether it affects the extrapancreatic findings and patient outcomes.

This retrospective study comprised of consecutive patients with isolated EPN evaluated between April 2017 and April 2019. A radiologist measured the pancreatic attenuation values (PAV) of head, body, and tail on a contrast enhanced CT. Using a cut-off PAV of 100HU, patients were divided into two groups. The extrapancreatic CT findings and outcome parameters were compared between the two groups.

Thirty patients (mean age, 42.13 years, 17 males) with isolated EPN were evaluated. The mean PAV in the head, body, and tail was 83.13 HU (range, 59-161), 84.17 HU (range, 60-160), and 82.23 HU (range, 53-137). The overall mean PAV was 83.12 HU (range, 58-152). There were six patients with overall mean PAV≥100 HU. The group with PAV≥100 HU had a higher number of patients with infected necrosis (66.6% vs. 14.2%, P=0.018). PAV had a significant association with length of hospitalization (P=0.045).

There is significant variability in the pancreatic enhancement on CT among patients with AP and isolated EPN. Patients with PAV≥100 HU had a significantly longer hospital stay. This, however, may be related to a greater number of patients with infected necrosis in this group.

There is significant variability in the pancreatic enhancement on CT among patients with AP and isolated EPN. Patients with PAV≥100 HU had a significantly longer hospital stay. This, however, may be related to a greater number of patients with infected necrosis in this group.

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