Examples of using Vector density in English and their translations into Portuguese
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Vector density.
In the studies on vectors, two found higher vector density in areas with little vegetation cover 34 34.
In the absence of animal reservoirs,an issue that remains unclear is how the dengue virus is able to persist in nature between epidemics and when vector density is low.
A reduction of the vector density of at least ten times was verified.
The control work during inter-epidemic periods andin periods of lower vector density is greatly important in this sense.
In the majority of the studies analyzed here, the highest vector density coincides with the rainy period, suggesting that rainfall is the most important abiotic factor for the increase in the vector population.
In this perspective, the entomological surveillance is particularly important, insofar as it is able to provide strategic information to control the disease by vector density indicators.
Outbreaks in rural areas can occur when the vector density increases in areas with non-immune populations.
The YF is transmitted to people through the bite of an infected female mosquito and has a seasonal characteristic, being more frequent between the months of January and April,when environmental factors favor the increase of the vector density.
Control measures for diseases transmitted by arthropods have the objective of reducing the vector density for consequent reduction of the incidence of dengue fever.
Due to the absence of effective and large-scale vaccines, and to the lack of a specific treatment against dengue symptoms,the general guideline is to focus on the reduction of the vector density.
This approach significantly reduced the vector density in Fortaleza, Ceará State, and is already being applied in two other municipalities, as requested by the Ministry of Health: Goiânia, Goiás State, and Belo Horizonte, Minas Gerais State.
Even though this disease is typically seasonal, cases of dengue are registered both in the rainy anddry periods, as the reduction in the vector density of adults in the cold and dry months is not enough to cease the disease transmission.
Although vector density is quite relevant information on the production of the disease we could not use the information available due to the complete lack of standardization in the collection and recording of data from the field activities of the agent teams for endemic diseases.
Therefore, with the circulation of serotype 4 in nearby or even border countries such as Venezuela, there is a risk of re-introduction of this serotype,which allied to a susceptible population and high vector density would be the ideal ingredients for a new explosive epidemic process.
On the other hand, the destruction of nature for the construction of social housing andto widen roads may have contributed to the increase in the vector density in the URSs, particularly in Imperatriz. This was due to the population increases because of the soya plantation and the extraction of wood in the pre-amazon region.
The data analyzed in our study suggests that the problem has acquired, in Cuiabá, a universal dimension, that is, the spread of cases has practically reached the entire urban area,demanding greater effort in the synchronizing actions in the several areas so as to cause impact on vector density and, maybe on incidence.
Four objectives orient their activities: detecting introduction of the virus in a timely manner and monitoring the epidemic;reducing the risk posed by high vector density; providing tools and guidance for adequate response management; and developing a regional research agenda.
Thus the present study aimed to characterize some of the ecoepidemiological aspects involved in the transmission pattern of this diseases, mainly by sand flies species identification, population density, urbanization and domiciliation as well as the influence of climate variables such as temperature, relative humidity andrainfall over the distribution pattern and vector density lutzomyia(lutzomyia) longipalpis and l.
The adoption of other measurements of infestation, such as the Bretau index, the positive container index, the mean number of existing andpositive containers per household surveyed could provide a more correct idea of vector density in each activity neighborhood or zone of the control program.
Although the virus has reemerged in São Paulo State after decades without cases, the disease continues to affect mostly men, in the economically active segment of the population, the rural workers and individuals who expose themselves to risk activities fishing, hunting, ecotourism, among others in the warmer months of the year, in areas with high levels of rainfall and, consequently,higher vector density.
The RSP marked important moments of the path of dengue in Brazil, with articles describing a history of Aedes aegypti control programs in Brazil, commenting on the introduction of Aedes albopictus in the Country and its potential impacts, the first epidemics in medium cities of the Southeast region, important studies on the vector behavior,seroprevalence surveys in Brazilian capitals as well as socioeconomic characteristics and their relation with the vector density and the occurrence of dengue.
These must be key breeding sites for control actions, because large breeding sites have a major importance in maintaining high vector densities in all seasons of the year.
The incidence of sylvatic YF proved to be seasonal, coinciding with the rainy season in the endemic area,when there is increased density of vectors.
A number of chemicals have been used for insect control, buttheir effectiveness is low given the high population density and vector resistance.