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Asymptomatic carriers can be categorized by their current disease state. [5] When an individual transmits pathogens immediately following infection but prior to developing symptoms, they are known as an incubatory carrier. Humans are also capable of spreading disease following a period of illness.
Disease carrier could refer to: Asymptomatic carrier , a person or organism infected with an infectious disease agent, but displays no symptoms Genetic carrier , a person or organism that has inherited a genetic trait or mutation, but displays no symptoms
A hereditary carrier (genetic carrier or just carrier), is a person or other organism that has inherited a recessive allele for a genetic trait or mutation but usually does not display that trait or show symptoms of the disease. Carriers are, however, able to pass the allele onto their offspring, who may then express the genetic trait.
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 ...
In epidemiology, a disease vector is any living [1] agent that carries and transmits an infectious pathogen such as a parasite or microbe, to another living organism. [ 2 ] [ 3 ] Agents regarded as vectors are mostly blood-sucking insects such as mosquitoes.
In some diseases, as depicted in this diagram, the latent period is shorter than the incubation period.In such cases, a person can transmit infection without showing any signs of the disease and is called subclinically infectious or an asymptomatic carrier
She was the first person in the United States identified as an asymptomatic carrier of the pathogenic bacterium Salmonella typhi. [1] [2] She was forcibly quarantined twice by authorities, the second time for the remainder of her life because she persisted in working as a cook and thereby exposed others to the disease. Mallon died after a total ...
If heterozygous, she is a carrier of the mutated allele because the disease is recessive. If homozygous, she has the disease. An affected father with an X-linked recessive trait will always pass the trait on to the daughter. Therefore, all daughters of an affected male are obligate carriers.