Search results
Results from the WOW.Com Content Network
For example, the human body louse transmits the bacterium Rickettsia prowazekii which causes epidemic typhus. Although invertebrate-transmitted diseases pose a particular threat on the continents of Africa, Asia and South America, there is one way of controlling invertebrate-borne diseases, which is by controlling the invertebrate vector.
Mosquitos are a vector for several diseases, including malaria. In epidemiology, a disease vector is any living [1] agent that carries and transmits an infectious pathogen such as a parasite or microbe, to another living organism. [2] [3] Agents regarded as vectors are mostly blood-sucking insects such as mosquitoes.
The vector itself generally carries a DNA sequence that consists of an insert (in this case the transgene) and a larger sequence that serves as the "backbone" of the vector. The purpose of a vector which transfers genetic information to another cell is typically to isolate, multiply, or express the insert in the target cell.
Examples are W. bancrofti, whose vector is a mosquito; night is the preferred time for blood collection. Loa loa's vector is the deer fly; daytime collection is preferred. [ 7 ] This method of diagnosis is only relevant to microfilariae that use the blood as transport from the lungs to the skin.
An example of a horizontally transmitted symbiont with a high specificity recognition and acquisition method is the Rhizobia-Legume symbiosis. The establishment of the symbiosis begins with the aposymbiotic plant releasing flavinoids that are detected by a specific Rhizobium species and triggers the induction of nod genes in the bacterium. [ 6 ]
This poses considerable problems for students of parasite ecology, as it renders parametric statistics as commonly used by biologists invalid. Log-transformation of data before the application of parametric test, or the use of non-parametric statistics is recommended by several authors, but this can give rise to further problems, so ...
RNA folding problem: Is it possible to accurately predict the secondary, tertiary and quaternary structure of a polyribonucleic acid sequence based on its sequence and environment? Protein design : Is it possible to design highly active enzymes de novo for any desired reaction?
The use of natural vector predators, such as bacterial toxins or botanical compounds, can help control vector populations. Using fish that eat mosquito larvae, the use of Catfish to eat up mosquito larvae in ponds can eradicate the mosquito population, or reducing breeding rates by introducing sterilized male tsetse flies have been shown to ...