Diarrhea and Coronavirus Disease 2019 Infection.

The global coronavirus disease-2019 (COVID-19) pandemic has caused significant morbidity and mortality, thoroughly affected daily living, and caused severe economic disruption throughout the world. Pulmonary symptoms predominate and account for most of the associated morbidity and mortality. However, extrapulmonary manifestations are common in COVID-19 infections, including gastrointestinal (GI) symptoms, such as diarrhea. Diarrhea affects approximately 10% to 20% of COVID-19 patients. Diarrhea can occasionally be the presenting and only COVID-19 symptom. Diarrhea in COVID-19 subjects is usually acute but is occasionally chronic. It is typically mild-to-moderate and nonbloody. It is usually much less clinically important than pulmonary or potential thrombotic disorders. Occasionally the diarrhea can be profuse and life-threatening. The entry receptor for COVID-19, angiotensin converting enzyme-2, is found throughout the GI tract, especially in the stomach and small intestine, which provides a pathophysiologic basis for local GI infection. COVID-19 virus has been documented in feces and in GI mucosa. Treatment of COVID-19 infection, especially antibiotic therapy, is a common culprit of the diarrhea, but secondary infections including bacteria, especially Clostridioides difficile, are sometimes implicated. Workup for diarrhea in hospitalized patients usually includes routine chemistries; basic metabolic panel; and a complete hemogram; sometimes stool studies, possibly including calprotectin or lactoferrin; and occasionally abdominal CT scan or colonoscopy. Treatment for the diarrhea is intravenous fluid infusion and electrolyte supplementation as necessary, and symptomatic antidiarrheal therapy, including Loperamide, kaolin-pectin, or possible alternatives. Superinfection with C difficile should be treated expeditiously. Diarrhea is prominent in post-COVID-19 (long COVID-19), and is occasionally noted after COVID-19 vaccination. The spectrum of diarrhea in COVID-19 patients is presently reviewed including the pathophysiology, clinical presentation, evaluation, and treatment.

The Impact of COVID-19 Infection on Miscellaneous Inflammatory Disorders of the Gastrointestinal Tract.

The novel coronavirus pandemic of COVID-19 has emerged as a highly significant recent threat to global health with about 600,000,000 known infections and more than 6,450,000 deaths worldwide since its emergence in late 2019. COVID-19 symptoms are predominantly respiratory, with mortality largely related to pulmonary manifestations, but the virus also potentially infects all parts of the gastrointestinal tract with related symptoms and manifestations that affect patient treatment and outcome. COVID-19 can directly infect the gastrointestinal tract because of the presence of widespread angiotensin-converting enzyme 2 receptors in the stomach and small intestine that can cause local COVID-19 infection and associated inflammation. This work reviews the pathopysiology, clinical manifestations, workup, and treatment of miscellaneous inflammatory disorders of the gastrointestinal tract other than inflammatory bowel disease.

Gastrointestinal Bleeding in COVID-19-Infected Patients.

COVID-19 infection is an ongoing catastrophic global pandemic with significant morbidity and mortality that affects most of the world population. Respiratory manifestations predominate and largely determine patient prognosis, but gastrointestinal (GI) manifestations also frequently contribute to patient morbidity and occasionally affect mortality. GI bleeding is usually noted after hospital admission and is often one aspect of this multisystem infectious disease. Although the theoretical risk of contracting COVID-19 from GI endoscopy performed on COVID-19-infected patients remains, the actual risk does not seem to be high. The introduction of PPE and widespread vaccination gradually increased the safety and frequency of performing GI endoscopy in COVID-19-infected patients. Three important aspects of GI bleeding in COVID-19-infected patients are (1) GI bleeding is often from mucosal erosions from mucosal infalammation that causes mild GI bleeding; (2) severe upper GI bleeding is often from PUD or stress gastritis from COVID-19 pneumonia; and (3) lower GI bleeding frequently arises from ischemic colitis associated with thromboses and hypercoagulopathy from COVID-19 infection. The literature concerning GI bleeding in COVID-19 patients is presently reviewed.

Critical Review Two-Years Thereafter of the Effectiveness of the Revolutionary Changes in a Gastroenterology Division at A Medical School Teaching Hospital in Response to the COVID-19 Pandemic: Medical School, Residency, and Gastrointestinal Fellowship Education and Clinical Practice of Gastroenterology Attendings and Gastrointestinal Endoscopy.

Profound and pervasive GI divisional changes maximized clinical resources devoted to COVID-19-infected patients and minimized risks of transmitting infection. Academic changes degraded by massive cost-cutting while offering institution to about 100 hospital systems and eventually "selling" institution to Spectrum Health, without faculty input.

A Critical Review from the Perspective of 2 Years Thereafter of the Effectiveness of Revolutionary Changes in a Gastroenterology Division at a Medical School Teaching Hospital due to the Coronavirus Disease-2019 Pandemic: Gastrointestinal Physician Clinical Practice and Emotional Stresses, Gastrointestinal Graduate Medical Education, Gastrointestinal Professional Societies, and Pandemic Control.

AIM: Critically review approximately 2 years afterward the effectiveness of revolutionary changes at an academic gastroenterology division from coronavirus disease-2019 (COVID-19) pandemic surge at the metropolitan Detroit epicenter from 0 infected patients on March 9, 2020, to >300 infected patients (one-quarter of) in-hospital census in April 2020 and >200 infected patients in April 2021. SETTING: GI Division, William Beaumont Hospital which had 36 GI clinical faculty who used to perform >23,000 endoscopies annually with a massive plunge in endoscopy volume during the past 2 years; fully accredited GI fellowship since 1973; employs >400 house staff annually since 1995; predominantly voluntary attendings; and primary teaching hospital, Oakland-University-Medical-School. METHODS: Expert opinion, based on: Hospital GI chief >14 years until September 2019; GI fellowship program director, at several hospitals for>20 years; author of 320 publications in peer-reviewed GI journals; and committee-member Food-and-Drug-Administration-GI-Advisory Committee for >5 years. Original study exempted by Hospital Institutional Review Board (IRB), April 14, 2020. IRB approval is not required for the present study because this opinion is based on previously published data. Advantageous changes: Division reorganized patient care to add clinical capacity and minimize risks to staff of contracting COVID-19. Affiliated medical school changes included: changing "live" to virtual lectures, meetings, and conferences. Initially, virtual meetings usually used telephone conferencing which proved cumbersome until meetings were changed to completely computerized virtual meetings using Microsoft Teams or Google Zoom, which performed superbly. Some clinical electives were canceled for medical students and residents because of the need to prioritize car for COVID-19 infection during the pandemic, and medical students graduated on time despite partly missing electives. Division reorganized by changing "live" GI lectures to virtual lectures; by four GI fellows temporarily reassigned as medical attendings supervising COVID-19-infected patients; postponing elective GI endoscopies; and drastically reducing an average number of endoscopies from 100/weekday to a small fraction long-term! GI clinic visits were reduced by half by postponing nonurgent visits, and physical visits were replaced by virtual visits. Economic pandemic impact included a temporary, hospital deficit initially relieved by federal grants and hospital employee terminations. GI program director contacted GI fellows twice weekly to monitor pandemic-induced stress. Applicants for GI fellowship were interviewed virtually. Graduate medical education changes included weekly committee meetings to monitor pandemic-induced changes; program managers working from home; canceling annual ACGME fellowship survey, ACGME site visits, and national GI conventions changed from physical to virtual. Dubious changes: Temporarily mandated intubation of COVID-19-infected patients for EGD; temporarily exempted GI fellows from endoscopy duties during surge; fired highly respected anesthesiology group employed for 20 years during pandemic leading to anesthesiology shortages, and abruptly firing without warning or cause numerous senior respected faculty who greatly contributed to research, academics, and reputation. CONCLUSION: Profound and pervasive GI divisional changes maximized clinical resources devoted to COVID-19-infected patients and minimized risks of transmitting infection. Academic changes were degraded by massive cost-cutting while offering institutions to about 100 hospital systems and eventually "selling" institutions to Spectrum Health, without faculty input.

Local COVID-19 Epicenter in Detroit Metropolitan Area Causing Profound and Pervasive Reorganization of Clinical, Educational, Research, and Financial Programs of a Large Academic Gastroenterology Division with a GI Fellowship and Primary Medical School Affiliation.

AIM: To report revolutionary reorganization of academic gastroenterology division from COVID-19 pandemic surge at metropolitan Detroit epicenter from 0 infected patients on March 9, 2020, to > 300 infected patients in hospital census in April 2020 and > 200 infected patients in April 2021. SETTING: GI Division, William Beaumont Hospital, Royal Oak, has 36 GI clinical faculty; performs > 23,000 endoscopies annually; fully accredited GI fellowship since 1973; employs > 400 house staff annually since 1995; tertiary academic hospital; predominantly voluntary attendings; and primary teaching hospital, Oakland-University-Medical-School. METHODS: This was a prospective study. Expert opinion. Personal experience includes Hospital GI chief > 14 years until 2020; GI fellowship program director, several hospitals > 20 years; author of > 300 publications in peer-reviewed GI journals; committee-member, Food-and-Drug-Administration-GI-Advisory Committee > 5 years; and key hospital/medical school committee memberships. Computerized PubMed literature review was performed on hospital changes and pandemic. Study was exempted/approved by Hospital IRB, April 14, 2020. RESULTS: Division reorganized patient care to add clinical capacity and minimize risks to staff of contracting COVID-19 infection. Affiliated medical school changes included: changing "live" to virtual lectures; canceling medical student GI electives; exempting medical students from treating COVID-19-infected patients; and graduating medical students on time despite partly missing clinical electives. Division was reorganized by changing "live" GI lectures to virtual lectures; four GI fellows temporarily reassigned as medical attendings supervising COVID-19-infected patients; temporarily mandated intubation of COVID-19-infected patients for esophagogastroduodenoscopy; postponing elective GI endoscopies; and reducing average number of endoscopies from 100 to 4 per weekday during pandemic peak! GI clinic visits reduced by half (postponing non-urgent visits), and physical visits replaced by virtual visits. Economic pandemic impact included temporary, hospital deficit subsequently relieved by federal grants; hospital employee terminations/furloughs; and severe temporary decline in GI practitioner's income during surge. Hospital temporarily enhanced security and gradually ameliorated facemask shortage. GI program director contacted GI fellows twice weekly to ameliorate pandemic-induced stress. Divisional parties held virtually. GI fellowship applicants interviewed virtually. Graduate medical education changes included weekly committee meetings to monitor pandemic-induced changes; program managers working from home; canceling ACGME annual fellowship survey, changing ACGME physical to virtual site visits; and changing national conventions from physical to virtual. CONCLUSION: Reports profound and pervasive GI divisional changes to maximize clinical resources devoted to COVID-19-infected patients and minimize risks of transmitting infection.

Novel Case Report: A Previously Reported, but Pathophysiologically Unexplained, Association Between Collagenous Colitis and Protein-Losing Enteropathy May Be Explained by an Undetected Link with Collagenous Duodenitis.

Collagenous colitis (CC) is associated with non-bloody, watery diarrhea, which is pathophysiologically reasonable because normal colonic absorption (or excretion) of water and electrolytes can be blocked by the abnormally thick collagen layer in CC. However, CC has also been associated with six previous cases of protein-losing enteropathy (PLE), with no pathophysiologic explanation. The colon does not normally absorb (or excrete) amino acids/proteins, which is primarily the function of the small bowel. Collagenous duodenitis (CD) has not been associated with PLE. This work reports a novel case of CD (and CC) associated with PLE; a pathophysiologically reasonable mechanism for CD causing PLE (by the thick collagen layer of CD blocking normal intestinal amino acid absorption); and a novel association of PLE with severe COVID-19 infection (attributed to relative immunosuppression from hypoproteinemia, hypoalbuminemia, hypogammaglobulinemia, and malnutrition from PLE).