Ardeid birds and pigs are known as major amplifying hosts for Japanese encephalitis virus, and ducklings and chickens have been considered to play at best a minor role in outbreaks because of their low or absent viremia.
Which animal is the reservoir of Japanese encephalitis?
Japanese encephalitis is spread through the bite of an infected mosquito (vector). Some animals, especially infected pigs and birds, can have large amounts of the virus in their blood and serve as a major source of the virus (reservoir) for mosquitoes.
Which organ does Japanese encephalitis infect?
Japanese encephalitis (JE) is an infection of the brain caused by the Japanese encephalitis virus (JEV). While most infections result in little or no symptoms, occasional inflammation of the brain occurs. In these cases, symptoms may include headache, vomiting, fever, confusion and seizures.
What causes Japanese encephalitis How does it enter the body?
JEV is transmitted to humans through bites from infected mosquitoes of the Culex species (mainly Culex tritaeniorhynchus). Humans, once infected, do not develop sufficient viraemia to infect feeding mosquitoes. The virus exists in a transmission cycle between mosquitoes, pigs and/or water birds (enzootic cycle).
What is vector of chikungunya?
Aedes mosquitoes transmit chikungunya virus to people. These types of mosquitoes are found throughout much of the world. Chikungunya virus is transmitted to people through mosquito bites.
What is the meaning of vector borne disease?
Vector-borne diseases are human illnesses caused by parasites, viruses and bacteria that are transmitted by vectors.
What happens if you get Japanese encephalitis?
Most people infected with JE do not have symptoms or have only mild symptoms. However, a small percentage of infected people develop inflammation of the brain (encephalitis), with symptoms including sudden onset of headache, high fever, disorientation, coma, tremors and convulsions. About 1 in 4 cases are fatal.
Where is Japanese encephalitis prevalent?
Japanese encephalitis is a viral brain infection that’s spread through mosquito bites. It’s most common in rural areas in southeast Asia, the Pacific islands and the Far East, but is very rare in travellers. The virus is found in pigs and birds, and is passed to mosquitoes when they bite infected animals.
Are vector-borne diseases zoonotic?
Many vector-borne diseases are zoonotic diseases, i.e. diseases that can be transmitted directly or indirectly between animals and humans. These include for example Lyme disease, tick-borne encephalitis, West Nile virus, Leishmaniosis and Crimean-Congo haemorrhagic fever.
How does the transmission of zoonotic and vector-borne diseases differ?
Vector-borne diseases include infections transmitted by mosquitoes, ticks and fleas. Common vector-borne diseases include Lyme Disease and Rocky Mountain Spotted Fever (transmitted by ticks) and West Nile Virus (transmitted by mosquitoes). Zoonotic diseases are infections spread from animals to humans.
Does platelet count decrease in chikungunya?
The time course analysis presented in Figure 3 supports platelet count as the key distinguishing variable for chikungunya and dengue infections, with the average platelet count scarcely dropping below 200×109/L in patients with chikungunya, but dropping below 100×109/L in dengue infections.