What is Henipavirus infection?
Of the 5 identified Henipavirus spp., Hendra virus and Nipah virus are highly virulent emerging pathogens that cause outbreaks in humans and are associated with high case-fatality ratios. Three additional species—Cedar virus, Ghanaian bat virus, and Mojiang virus—are not known to cause human disease.
How does Nipah virus replicate?
(A) Nipah virus replication cycle. NiV enters a cell, where the viral genome is released, leading to the initiation of transcription and the accumulation of viral mRNA transcripts. In addition, the viral genome is transcribed into a full-length anti-genome, which is used to generate additional copies of the NiV genome.
What viruses are belonging to the Henipavirus genus?
Taxonomy
| Genus | Species | Virus (Abbreviation) |
|---|---|---|
| Henipavirus | Ghanaian bat henipavirus | Kumasi virus (KV) |
| Hendra henipavirus | Hendra virus (HeV) | |
| Mojiang henipavirus | Mòjiāng virus (MojV) | |
| Nipah henipavirus | Nipah virus (NiV) |
Is Nipah RNA or DNA?
Nipah virus (NiV) is a nonsegmented, single-stranded, negative-sense RNA virus belonging to the genus Henipavirus, family Paramyxoviridae.
What type of virus is Hendra virus?
Hendra Virus Disease (HeV) Hendra virus (HeV) is a member of the family Paramyxoviridae, genus Henipavirus. HeV was first isolated in 1994 from specimens obtained during an outbreak of respiratory and neurologic disease in horses and humans in Hendra, a suburb of Brisbane, Australia.
Can Nipah virus spread from human-to-human?
Human-to-human transmission of Nipah virus has also been reported among family and care givers of infected patients. During the later outbreaks in Bangladesh and India, Nipah virus spread directly from human-to-human through close contact with people’s secretions and excretions.
How does Nipah spread from human to human?
How does Nipah virus enter cells?
Highly pathogenic Nipah virus (NiV) infections are transmitted via airway secretions and urine, commonly via the respiratory route. Epithelial surfaces represent important replication sites in both primary and systemic infection phases.
What bacteria causes Hendra?
Hendra virus (HeV) is a member of the family Paramyxoviridae, genus Henipavirus. HeV was first isolated in 1994 from specimens obtained during an outbreak of respiratory and neurologic disease in horses and humans in Hendra, a suburb of Brisbane, Australia.
How do you test for Nipah virus?
Different tests are available to diagnose NiV infection. During early stages of the illness, laboratory testing can be conducted using real time polymerase chain reaction (RT-PCR) from throat and nasal swabs, cerebrospinal fluid, urine, and blood.
What is the structure of Nipah virus?
The Nipah virus phosphoprotein (P) is multimeric and tethers the viral polymerase to the nucleocapsid. We present the crystal structure of the multimerization domain of Nipah virus P: a long, parallel, tetrameric, coiled coil with a small, α-helical cap structure.
Why is it called Hendra virus?
Hendra virus in Australia The virus was discovered in 1994 after a Queensland horse trainer and 14 of his horses died. One stable hand was also infected, but recovered. The virus was named Hendra virus after the Brisbane suburb where it first occurred.
Does Nipah virus have a vaccine?
Significance. Concern has increased about the pandemic potential of Nipah virus (NiV). Similar to SARS-CoV-2, NiV is an RNA virus that is transmitted by respiratory droplets. There are currently no NiV vaccines licensed for human use.
Can Nipah virus survive in fruits?
Dr Ashutosh Biswas, Professor, Department of Medicine at AIIMS has said that the Nipah virus is more contagious after it is transmitted from animals to humans. Nipah virus is spread mostly by fruit bats. Fruit bats leave their saliva on the fruit. The virus transmits to animals and humans once they eat the same fruit.
How can we prevent Nipah virus?
Prevention
- Practice handwashing regularly with soap and water.
- Avoid contact with sick bats or pigs.
- Avoid areas where bats are known to roost.
- Avoid eating or drinking products that could be contaminated by bats, such as raw date palm sap, raw fruit, or fruit that is found on the ground.
Is there vaccine for Nipah virus?
There is currently no vaccine approved for humans. While several preventive vaccines have shown promise in protecting animals against lethal Nipah virus disease, most studies have assessed protection one month after vaccination.
How does Ebola virus replicate?
Ebola Virus do not replicate through any kind of cell division; rather, they use a combination of host and virally encoded enzymes, alongside host cell structures, to produce multiple copies of viruses. These then self-assemble into viral macromolecular structures in the host cell.