latent carrier

la·tent car·ri·er

a person, typically a prospective parent, bearing the appropriate genotype of a trait (homozygous for recessive, homozygous or heterozygous for dominant, hemizygous or homozygous for X-linked) that manifests the trait only under certain conditions, for example, age, an environmental insult, etc.

la·tent car·ri·er

(lā'tĕnt kar'ē-ĕr)
A person, typically a prospective parent, bearing the appropriate genotype of a trait (homozygous for recessive, homozygous or heterozygous for dominant, hemizygous or homozygous for X-linked) that manifests the trait only under certain conditions (e.g., age, an environmental insult).
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References in periodicals archive ?
Treatment of ailing goat in the flock will reduce the chances of latent carriers in flock thus perpetuation of disease in the herd.
9 of 13 states in the Critical phase, but was expected to move into the Catastrophic Phase as a result of people who are latent carriers of disease or who entered the country during the incubation period for a disease.
'Second, some horses become latent carriers. This means you could end up with a yard that enters a continuous spiral of infection, sourced from an individual carrier.
Infection may spread vertically to calves born to infected dams and such calves remain as latent carriers without developing detectable serum antibody through its early life (Crawford et al.,1986).