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An asymptomatic carrier is a person or other organism that has become infected with a pathogen, but shows no signs or symptoms. [ 1 ] Although unaffected by the pathogen, carriers can transmit it to others or develop symptoms in later stages of the disease.
The 'long-term nonprogressors' term is used for HIV carriers only but the wide term asymptomatic carrier is well known for ... Wikipedia® is a registered ...
In these kinds of cases with a significant number of pre-symptomatic (asymptomatic) transmissions, symptomatic surveillance-based disease control measures (such as isolation, contact tracing, enhanced hygiene, etc.) are likely to have their effectiveness reduced, because a significant portion of the transmission may take place before the onset ...
Typhoid Mary, pictured above in a 1909 tabloid, was a famous case of a subclinical infection of Salmonella enterica serovar.. A subclinical infection—sometimes called a preinfection or inapparent infection—is an infection by a pathogen that causes few or no signs or symptoms of infection in the host. [1]
Individuals who have the bacterium in their bodies but no signs of disease are known as asymptomatic carriers. [39] [40] [41] The bacteria may start to cause disease when the host's immune system weakens, such as during a viral respiratory infection, which may lead to S. pyogenes superinfection. [40] [41]
[28] [29] [30] Asymptomatic carriers tend not to get tested. [30] [31] [32] Persons with asymptomatic COVID-19 infection can have the same viral load as symptomatic and presymptomatic cases, and are able to transmit the virus. [8] However, the infectious period of asymptomatic cases has been observed to be shorter with faster viral clearance. [8]
An infectious disease agent can be transmitted in two ways: as horizontal disease agent transmission from one individual to another in the same generation (peers in the same age group) [3] by either direct contact (licking, touching, biting), or indirect contact through air – cough or sneeze (vectors or fomites that allow the transmission of the agent causing the disease without physical ...
Human-to-human transmission (HHT) is an epidemiologic vector, [1] [2] [3] [4] [5] [6] [7] [8] especially in case the disease is borne by individuals known as ...