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An infection is the invasion of tissues by pathogens, their multiplication, and the reaction of host tissues to the infectious agent and the toxins they produce. [1] An infectious disease, also known as a transmissible disease or communicable disease, is an illness resulting from an infection.
First diagnosis of aHUS is often made in the context of an initial, complement-triggering infection, and Shiga-toxin has also been implicated as a trigger that identifies patients with aHUS. Treatment involves supportive care and may include dialysis , steroids , blood transfusions , and plasmapheresis .
Transmissibility is the probability of an infection, given a contact between an infected host and a noninfected host. [8] Community transmission means that the source of infection for the spread of an illness is unknown or a link in terms of contacts between patients and other people is missing. It refers to the difficulty in grasping the ...
Also infection can spread down the tissue spaces to the mediastinum which has significant consequences on the vital organs such as the heart. Another complication, usually from upper teeth, is a risk of sepsis traveling through pathways to which it can possibly lead to endocarditis , brain abscess (extremely rare), or meningitis (also rare).
Mary Mallon was an asymptomatic carrier of Salmonella typhi who is thought to have infected 53 others with typhoid fever while continuing her work as a cook. An asymptomatic carrier is a person or other organism that has become infected with a pathogen , but shows no signs or symptoms .
These opportunistic infections often involve hospital-acquired infections among patients already combating another condition. [ 8 ] Infectivity involves pathogen transmission through direct contact with the bodily fluids or airborne droplets of infected hosts, indirect contact involving contaminated areas/items, or transfer by living vectors ...
Some viruses can cause lifelong or chronic infections, where the viruses continue to replicate in the body despite the host's defence mechanisms. [113] This is common in hepatitis B virus and hepatitis C virus infections. People chronically infected are known as carriers, as they serve as reservoirs of infectious virus. [114]
This is an accepted version of this page This is the latest accepted revision, reviewed on 18 November 2024. Condition negatively affecting an organism For other uses, see Disease (disambiguation). "Maladies" redirects here. For the 2012 film, see Maladies (film). "Ailment" redirects here. Not to be confused with Aliment. "The Sick Girl", by Michael Ancher, 1882, National Gallery of Denmark A ...