OMS Risks Global Spread
- Facing new confirmed cases in Asia, the WHO (World Health Organization) clarified this Friday (30th) that the risk of spreading the Nipah virus is low.
- The organization informed that none of the 190 people who had contact with the two infected nurses in India tested positive, nor did they present symptoms...
- "The risk at the national, regional and global level is considered low," said Anais Legand, from the WHO's Health Emergency Program, according to Reuters.
Foto: Divulgação/OMS/ND Mais
Facing new confirmed cases in Asia, the WHO (World Health Organization) clarified this Friday (30th) that the risk of spreading the
Nipah virus
is low.
The organization informed that none of the 190 people who had contact with the two infected nurses in India tested positive, nor did they present
symptoms of the disease. Both patients,placed in isolation in early January,remain hospitalized.
“The risk at the national, regional and global level is considered low,” said Anais Legand, from the WHO’s Health Emergency Program, according to Reuters.
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What is Nipah Virus?
Table of Contents
Nipah virus (NiV) is a zoonotic virus – meaning it spreads between animals and humans – that causes a severe respiratory and neurological illness, with fatality rates ranging from 40% to 75% depending on the outbreak and quality of healthcare access. The virus was first identified in 1998 during an outbreak among pig farmers in Malaysia and Singapore.
NiV is classified as a Category C priority pathogen, meaning it has the potential for widespread impact but currently has no available vaccines or treatments. The natural reservoir for NiV is fruit bats, particularly Pteropus species, though other animals like pigs, dogs, cats, and horses can also become infected and act as intermediate hosts.
Example: The first documented outbreak of Nipah virus occurred in september 1998 in Kampung Sungai Nipah, Malaysia, affecting 265 people and resulting in 109 deaths, according to the World Health Organization (WHO).
How is Nipah Virus Transmitted?
Nipah virus transmission occurs through several routes, primarily involving close contact with infected animals or contaminated food. Human-to-human transmission is also possible, particularly in hospital settings.
The primary modes of transmission include:
- Contact with infected animals: Handling sick pigs, consuming raw date palm sap contaminated with bat urine, or direct contact with infected bats.
- Consumption of contaminated food: Unpasteurized fruit juices or raw date palm sap contaminated with bat saliva or urine.
- Human-to-human transmission: Close contact with an infected person’s bodily fluids (respiratory droplets, urine, blood, etc.).
Evidence: A 2023 outbreak in Kerala, India, saw transmission linked to bat-contaminated fruit, as reported by the Centers for Disease Control and Prevention (CDC). This outbreak highlighted the risk of consuming contaminated food products.
What are the Symptoms of Nipah Virus Infection?
Symptoms of Nipah virus infection can vary, ranging from mild to severe. Initial symptoms often resemble the flu, but can rapidly progress to more serious neurological complications.
Common symptoms include:
- Fever
- Headache
- Muscle pain
- Nausea and vomiting
- Sore throat
- Dizziness
- Encephalitis (inflammation of the brain)
- Seizures
- Coma
Statistic: According to a study published in the National Center for Biotechnology Data (NCBI), approximately 20% of patients with Nipah virus encephalitis experiance long-term neurological sequelae, such as cognitive impairment.
Diagnosis and Treatment of Nipah Virus
Diagnosing Nipah virus infection can be challenging due to the initial similarity of symptoms to other illnesses. Laboratory tests are crucial for confirmation.
Diagnostic methods include:
- Reverse transcription polymerase chain reaction (RT-PCR): Detects the virus’s genetic material in samples like cerebrospinal fluid, urine, or blood.
- Antibody-detection tests: Identify antibodies produced by the body in response to the virus.
- Virus isolation: Growing the virus in cell culture (typically done in specialized laboratories).
Currently, there are no specific antiviral treatments for Nipah virus infection. treatment is primarily supportive, focusing on managing symptoms and preventing complications. This includes intensive care,respiratory support (mechanical ventilation if needed),and managing fever and seizures.
Official Statement: The WHO states that “intensive supportive care is the main treatment for Nipah virus infection. There are currently no licensed vaccines or antiviral treatments available.” (WHO Fact Sheet on Nipah Virus)
Prevention and Control Measures
Preventing Nipah virus infection relies on reducing the risk of transmission from animals to humans and from person to person.
Key prevention measures include:
- Avoiding contact with bats: Do not handle bats or consume raw date palm sap.
- Properly cooking food: ensure all meat, especially pork, is thoroughly cooked.
- Practicing good hygiene: Wash hands frequently with soap and water, especially after contact with animals.
- Avoiding close contact with infected individuals: Implement