What parasite causes dengue fever?
What parasite causes dengue fever?
Dengue is spread by several species of female mosquitoes of the Aedes genus, principally Aedes aegypti. The virus has five serotypes; infection with one type usually gives lifelong immunity to that type, but only short-term immunity to the others….
| Dengue fever | |
|---|---|
| Deaths | ~40,000 (2017) |
Which species is vector for dengue virus spread?
Aedes aegypti mosquito. Dengue viruses are spread to people through the bites of infected Aedes species mosquitoes (Ae. aegypti or Ae. albopictus).
How does the immune system response to dengue fever?
To fight the infection, the immune system produces antibodies to neutralize the dengue viral particles, and the complement system is activated to help the antibodies and white blood cells remove the virus. The immune response also includes cytotoxic T cells (lymphocytes), which recognize and kill infected cells.
What is the structure of dengue virus?
The dengue virus has a roughly spherical structure. It is composed of the viral genome and capsid proteins surrounded by an envelope and a shell of proteins. After infecting a host cell, the dengue virus hijacks the host cell’s machinery to replicate the viral RNA genome and viral proteins.
Why do platelets decrease in dengue?
The normal platelet count in the body ranges from 1.5 to 4 lacs, this can go down to as low as 20,000 to 40,000 in the case of dengue patients. This happens because: Dengue can damage your bone marrow, the platelet-producing centre of the body. The dengue virus can affect your blood cells and damage your platelets.
What is the name of malarial parasite?
Malaria parasites are micro-organisms that belong to the genus Plasmodium. There are more than 100 species of Plasmodium, which can infect many animal species such as reptiles, birds, and various mammals. Four species of Plasmodium have long been recognized to infect humans in nature.
What disease does Culex mosquito transmit?
List of vector-borne diseases, according to their vector
| Vector | Disease caused | |
|---|---|---|
| Mosquito | Anopheles | Lymphatic filariasis Malaria |
| Culex | Japanese encephalitis Lymphatic filariasis West Nile fever | |
| Aquatic snails | Schistosomiasis (bilharziasis) | |
| Blackflies | Onchocerciasis (river blindness) |
How does Aedes aegypti spread dengue?
Dengue is spread through the bite of the female mosquito (Aedes aegypti). The mosquito becomes infected when it takes the blood of a person infected with the virus. After about one week, the mosquito can then transmit the virus while biting a healthy person.
How would the non structural proteins of the dengue virus be presented to the immune system?
NS1 is the only nonstructural protein of DENV that can be both anchored on the surface of infected cells as a membrane-associated homodimer and released from infected cells into circulation as a hexamer. These properties of NS1 make it able to trigger both cellular and humoral immunity.
Does dengue create immunity?
RIO DE JANEIRO (Reuters) – A new study that analyzed the coronavirus outbreak in Brazil has found a link between the spread of the virus and past outbreaks of dengue fever that suggests exposure to the mosquito-transmitted illness may provide some level of immunity against COVID-19.