Related Experiment Video
Updated: Aug 24, 2025

Adapting Gastrointestinal Organoids for Pathogen Infection and Single Cell Sequencing under Biosafety Level 3 BSL-3 Conditions
Published on: September 10, 2021
Atypical Viral Infections in Gastroenterology
Neira Crnčević1, Zijah Rifatbegović2, Mirsada Hukić3,4
1Department of Genetics and Bioengineering, International Burch University, Francuske revolucije bb, 71210 Ilidža, Bosnia and Herzegovina.
Abstract:
Enteric viruses are commonly found obligate parasites in the gastrointestinal (GI) tract. These viruses usually follow a fecal-oral route of transmission and are characterized by their extraordinary stability as well as resistance in high-stress environments. Most of them cause similar symptoms including vomiting, diarrhea, and abdominal pain. In order to come in contract with mucosal surfaces, these viruses need to pass the three main lines of defense: mucus layer, innate immune defenses, and adaptive immune defenses. The following atypical gastrointestinal infections are discussed: SARS-CoV2, hantavirus, herpes simplex virus I, cytomegalovirus, and calicivirus. Dysbiosis represents any modification to the makeup of resident commensal communities from those found in healthy individuals and can cause a patient to become more susceptible to bacterial and viral infections. The interaction between bacteria, viruses, and host physiology is still not completely understood. However, with growing research on viral infections, dysbiosis, and new methods of detection, we are getting closer to understanding the nature of these viruses, their typical and atypical characteristics, long-term effects, and mechanisms of action in different organ systems.
Insights
Enteric viruses are resilient GI tract parasites transmitted via fecal-oral routes. This review explores typical and atypical viral infections, including SARS-CoV-2, and their interaction with gut dysbiosis.
Area of Science:
- Gastroenterology
- Virology
- Immunology
Background:
- Enteric viruses are obligate parasites of the gastrointestinal (GI) tract, known for their stability and fecal-oral transmission.
- Common symptoms include vomiting, diarrhea, and abdominal pain, necessitating passage through mucus, innate, and adaptive immune defenses.
- Atypical infections like SARS-CoV-2, hantavirus, herpes simplex virus I, cytomegalovirus, and calicivirus in the GI tract are increasingly recognized.
Purpose of the Study:
- To review the characteristics of enteric viruses and their interaction with host defenses.
- To discuss atypical gastrointestinal viral infections and the role of gut dysbiosis.
- To highlight the importance of understanding viral mechanisms and host-microbiome interactions.
Main Methods:
- Literature review of enteric viral infections and host-pathogen interactions.
- Analysis of viral mechanisms for overcoming host defenses.
- Exploration of the impact of gut dysbiosis on viral susceptibility and infection outcomes.
Main Results:
- Enteric viruses exhibit remarkable stability and employ diverse strategies to breach GI tract defenses.
- Gut dysbiosis can increase susceptibility to both bacterial and viral infections.
- Atypical presentations of viruses like SARS-CoV-2 in the GI tract are significant.
Conclusions:
- Understanding the complex interplay between enteric viruses, host immunity, and the gut microbiome is crucial.
- Further research into viral detection, characteristics, and long-term effects is needed.
- The study of viral-bacterial interactions and host physiology will advance knowledge of GI infections.
Related Concept Videos
Gastritis-II: Pathophysiology
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
Gastritis can stem from various causes, each...
Gastritis-I: Introduction and Types
Acute gastritis presents as a sudden inflammation triggered by various stressors to the stomach lining, such as exposure to corrosive agents, local irritants like aspirin and other NSAIDs, alcohol consumption, radiation therapy, physical trauma, severe burns, sepsis,...
Viruses of Archaea
Gastritis III: Clinical Manifestations and Management
Clinical manifestations of acute gastritis
The patient with acute gastritis may have a rapid onset of symptoms, such as epigastric pain or discomfort, dyspepsia, anorexia, hiccups, or nausea and vomiting, which can last from a few hours to a few days. Erosive or hemorrhagic gastritis may cause bleeding, which may manifest as blood in vomit or as...
Gastrointestinal Motility Disorders
Other Disorders of Digestive System

