Rickettsia species are best known as the causative agents of vector-borne diseases, with rickettsial diseases representing an important cause of illness and death worldwide [ 1].
The role of aquatic predators as control agents of malaria vectors is potentially enhanced through conservation or through the introduction of agents from outside.
An estimated 70% or more of emerging infectious disease agents have some form of vector.
Strains of B. sphaericus are toxic towards mosquito larvae and can be used as biological control agents of the important vectors of filariasis, malaria and yellow fever [89].
In general, the agents of human disease vectored by mosquitoes must complete a period of within-mosquito development before they can be transmitted.
The studied entomoparasitic nematodes possess high potential as control agents of the flea vectors of plague owing to their high propagation rate within the flea host and high infestation level (up to 21% observed in this study and from 50 to 60%, as estimated by other authors [ 10, 11]).
Among these transformations, the increase in demographic density, the mass production of disposable goods that are discarded into the environment and the greatly increased mobility of populations within and between countries are a few of the most significant, vastly facilitating the circulation of the agents and vectors of transmittable diseases.
We thus feel that it is important that laboratory evaluations of vector control agents include several environments, and in particular environments relevant to field conditions.
"While there is no such thing as a safe cigarette, we believe we've eliminated what the health community considers to be the most serious cancer-causing agents with these developments," Bennett LeBow, chairman of Vector, said in a statement.
Considering the above close association of vector biology (DBMS Agent) with ecological parameters, rainfall, soil, altitude and temperature (GIS Agent), the ES Agent can then be required.
