Quarantine

Definition

A regulatory restriction on the movement of organisms, materials, or vectors to prevent the introduction or spread of pests, pathogens, or invasive species. In entomology and arachnology, quarantine measures target living insects, mites, ticks, or contaminated substrates (soil, plant material, equipment) that may harbor disease agents, agricultural pests, or organisms not yet established in a region. Quarantine differs from isolation, which separates known infected individuals; quarantine applies to suspected exposure or preventive containment.

Etymology

From Italian quarantina, 'forty days,' the historical period of isolation for ships arriving in Venice during plague epidemics.

Example

Honeybee colonies imported from regions with Varroa destructor are held in apiary quarantine for 30 days to detect mite infestation before release to domestic beekeepers.

Related Terms

• isolation
• vector control
• biosecurity
• invasive species management
• phytosanitary certificate
• exotic pest
• containment
• Eradication

Usage Notes

In entomological and agricultural contexts, 'quarantine' often refers to regulatory frameworks (e.g., APHIS quarantine zones for emerald ash borer) rather than individual isolation. The term applies to arthropods as vectors (mosquitoes in yellow fever quarantine), as pests (fruit fly quarantine zones), and as contaminated goods (soil quarantine to prevent fire ant spread). Distinguish from 'isolation' used for laboratory or clinical separation of infected specimens.