mechanical vector


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Related to mechanical vector: biological vector

vector

 [vek´tor]
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.

me·chan·i·cal vec·tor

a vector that conveys pathogens to a susceptible individual without essential biologic development of the pathogens in the vector, as in the transfer of septic organisms on the feet or mouth parts of the housefly.

me·chan·i·cal vec·tor

(mĕ-kan'i-kăl vek'tŏr)
A vector that conveys pathogens to a susceptible individual without essential biologic development of the pathogens in the vector, as in the transfer of septic organisms on the feet or mouth parts of the housefly.
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References in periodicals archive ?
Then if the observed index = 0, the fly has no risk as mechanical vector; species with values [greater than or equal to] 0.01 and <0.03 were considered low risk species; species with values ranging [greater than or equal to] 0.03 to <0.09 were moderate risk species and with values [greater than or equal to] 0.09 to 1 were high risk species as pathogen carriers.
They declared, 'that the two cockroach species from residential buildings in Somolu, Lagos, southwest Nigeria, carry human intestinal parasites on their body surfaces and/or in the gut indicate that concerns over their potential and/or role as mechanical vectors cannot be overlooked.'
* Mechanical vectors are not necessary to the life cycle of the pathogen and are passive participants in the transmission of disease.
Horse flies (Diptera: Tabanidae) are known world-wide as important mechanical vectors of viruses, bacteria, protozoans, and helminths that cause diseases in wild and domestic animals.
There is growing evidence that migratory birds serve as reservoirs and/or mechanical vectors for pathogens such as tick-borne encephalitis virus and Rickettsia spp.
These studies have incriminated tabanids as mechanical vectors of T.
Houseflies: not simple mechanical vectors of entero-hemorrhagic Escherichia coli O157:H7.
These flies regurgitate and defecate when feeding and are mechanical vectors of bacteria (3,4).

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