biological vector(redirected from Vector (biology))
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1. a carrier, especially the animal (usually an arthropod) that transfers an infective agent from one host to another. Examples are the mosquito that carries the malaria parasite Plasmodium between humans, and the tsetse fly that carries trypanosomes from other animals to humans. Dogs, bats, and other animals are vectors that transmit the rabies virus to humans.
2. a plasmid or viral chromosome into whose genome a fragment of foreign DNA is inserted, used to introduce the foreign DNA into a host cell in the cloning of DNA.
3. a quantity possessing magnitude, direction, and sense (positivity or negativity), and commonly represented by a straight line resembling an arrow; the length of the line denotes magnitude, the arrowhead denotes sense, and the position of the line with respect to an axis of reference denotes direction. adj., adj vector´ial.
biological vector an animal vector in whose body the pathogenic organism develops and multiplies before being transmitted to the next host.
mechanical vector an animal vector not essential to the life cycle of the parasite.
An animal vector in which the disease-causing organism multiplies or develops prior to becoming infective for a susceptible person.
See also: vector
1. a carrier, especially the animal (usually an arthropod) which transfers an infective agent from one host to another, e.g the tsetse fly, which carries trypanosomes from animals to humans, dogs, bats and other animals that transmit the rabies virus. In molecular biology, a DNA molecule which serves to transfer DNA into a host cell.
2. a quantity possessing magnitude, direction and sense (positivity or negativity).
an arthropod vector in whose body the infecting organism develops or multiplies before becoming infective to the recipient individual.
a DNA molecule used to transfer an inserted DNA segment into a host cell. Includes other viruses, phages and bacterial plasmids. Called also cloning vehicle.
an arthropod vector that transmits the infective organisms from one host to another but is not essential to the life cycle of the parasite.
vectors which contain both prokaryotic and eukaryotic replication signals, thus allowing replication of the vector in both kinds of cells.
a vector carrying a DNA sequence that is able to take part in a specified chromosomal crossover in the host.