Search results
Results from the WOW.Com Content Network
The mosquito Aedes aegypti feeding on a human host. Dengue virus is most frequently ... Vertical transmission ... modification is the preferred method of control ...
Dengue virus (DENV) is the cause of dengue fever.It is a mosquito-borne, single positive-stranded RNA virus of the family Flaviviridae; genus Flavivirus. [1] [2] Four serotypes of the virus have been found, and a reported fifth has yet to be confirmed, [3] [4] [5] all of which can cause the full spectrum of disease. [1]
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.
For diseases where there is no effective cure, such as Zika virus, West Nile fever and Dengue fever, vector control remains the only way to protect human populations. [citation needed] However, even for vector-borne diseases with effective treatments the high cost of treatment remains a huge barrier to large amounts of developing world populations.
The CDC warned about a higher-than-expected number of dengue cases among US travelers — 745 cases through June 24.
In 1906, transmission by the Aedes mosquitoes was confirmed, and in 1907 dengue was the second disease (after yellow fever) that was shown to be caused by a virus. [42] Further investigations by John Burton Cleland and Joseph Franklin Siler completed the basic understanding of dengue transmission. [42]
The recent spread of Dengue can also be attributed to rapid population growth, increased coagulation in urban areas, and global travel. Without sufficient vector control, the dengue virus has evolved rapidly over time, posing challenges to both government and public health officials. [58] Malaria is caused by a protozoan called Plasmodium ...
Transovarial and transstadial transmission of the Ixodes tick. Transovarial or transovarian transmission (transmission from parent to offspring via the ovaries) occurs in certain arthropod vectors as they transmit pathogens from parent to offspring. [1] This process, used by a wide variety of parasites, is also known as vertical transmission. [2]