passive carrier

passive carrier

Etymology: L, passivus + OFr, carier
1 a healthy person whose body carries the causal organisms of an infectious disease although the person has not contracted the disease and remains symptomless.
2 a person who carries a gene associated with a hereditary trait although the trait is not expressed in the person. Also called symptomless carrier.
References in periodicals archive ?
In that scenario, processes within a nerve cell determine whether or not to fire an electrical impulse, and the wire, called an axon, is a passive carrier of that signal.
Whilst the majority of targeted delivery systems under evaluation incorporate passive carrier systems, we anticipate there will be shift towards the use of actively targeted carriers to increase the therapeutic index of existing and new products.
Whilst the majority of targeted delivery systems under evaluation incorporate passive carrier systems, there will be a shift towards the use of actively targeted carriers to increase the therapeutic index of existing and new products.
The UM-SK-104 also includes a CB-104 Carrier Board for the SCM240 that provides power, physical layer drivers, and connectors, a USMD8IO optically isolated 8 Digital I/O extension module, CB-102 Passive Carrier Board to connect two optional extension modules, 24VDC power supply, serial debug cable, and an Ultimodule Tools CD-ROM.
It also contains a CB100 Carrier Board for the SCM220 (providing power and physical connectors), a USMD8IO optically isolated 8 Digital I/O module, CB102 Passive Carrier Board to connect other modules, 24VDC power supply, serial debug cable, and a Tools Installation CD-ROM.
About 90% of people are infected with the virus, usually beginning in childhood, and are asymptomatic, passive carriers.

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