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7 gru 2023 · A systemic infection occurs when harmful bacteria or viruses enter the bloodstream and spread throughout the body. Unlike localized infections, which are confined to specific body parts, systemic infections can affect multiple organs and systems.
23 lis 2022 · Viral infections are any illness you get from a virus (a small germ that uses your cells to reproduce). Common viral illnesses include colds, the flu, COVID-19, norovirus (“stomach flu”), HPV (warts) and herpes simplex virus (cold sores). Many viruses go away on their own, but some cause life-threatening or chronic illnesses.
A viral disease (or viral infection) occurs when an organism's body is invaded by pathogenic viruses, and infectious virus particles (virions) attach to and enter susceptible cells. [1] Examples are the common cold, gastroenteritis and pneumonia. [2]
11 lis 2016 · Understanding viral disease pathogenesis requires knowledge of each of the stages of infection and an awareness of the mechanisms involved. The pattern of pathogenetic events accompanying infection is remarkably consistent and specific for each individual virus.
4 lis 2016 · Enteric viral infections usually result in rapid onset of gastrointestinal disease after a short incubation period, whereas systemic infections have a longer incubation period and are typically accompanied by clinical signs that are not confined to dysfunction of the gastrointestinal tract.
11 lis 2021 · Systemic inflammation reflects an excessive activation of circulating leukocytes, particularly in response to viremia. These two types of clinical inflammation can co-exist. They result from a failure of cell-intrinsic immunity to control the intracellular virus in leukocytes, or, more commonly, in other cells.
A viral infection can lead to a spectrum of symptoms from asymptomatic (no overt symptoms) to severe disease. People may get viruses by swallowing or inhaling them, by being bitten by insects, through sexual contact, or congenitally (passed by a pregnant person to the fetus).
