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Arboviral Encephalitis01:25

Arboviral Encephalitis

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Arboviral encephalitis refers to brain inflammation caused by arthropod-borne viruses, particularly those transmitted through mosquito vectors. Among these, West Nile virus (WNV), a member of the Flaviviridae family, is a significant public health concern. WNV is an enveloped, positive-sense, single-stranded RNA virus. Human infection typically begins when an infected mosquito introduces the virus into the dermis during feeding. The primary transmission cycle involves birds as amplifying hosts...
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The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
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Cytomegalovirus (CMV) disease is caused by human cytomegalovirus, a double-stranded DNA virus of the Herpesviridae family. While primary CMV infection is often asymptomatic in immunocompetent individuals, the virus can cause severe disease in neonates and immunocompromised patients. CMV is the most common cause of congenital viral infection in the United States, and a major pathogen in solid organ and hematopoietic stem cell transplant recipients.CMV is transmitted via bodily fluids, sexual...
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Viral meningitis is the most common form of meningitis and is often referred to as aseptic meningitis to indicate the absence of bacterial involvement. It is generally milder than bacterial meningitis, with symptoms including fever, headache, stiff neck, drowsiness, nausea, photophobia, and vomiting. Rarely, more severe manifestations or death may occur. Common causative agents include enteroviruses, particularly coxsackie A and B viruses and echoviruses, all members of the Enterovirus genus...
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Influenza is an acute, highly communicable viral disease that affects the respiratory tract and is responsible for seasonal epidemics worldwide. Influenza A is the most prevalent type associated with widespread outbreaks and is subtyped based on two surface glycoproteins: hemagglutinin (H) and neuraminidase (N), as in H1N1. These glycoproteins are essential for viral infectivity, transmission, and immune recognition. Transmission occurs primarily through respiratory droplets and contaminated...
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Related Experiment Video

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Zika Virus Infectious Cell Culture System and the In Vitro Prophylactic Effect of Interferons
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Chikungunya virus pathogenesis: From bedside to bench.

Thérèse Couderc1, Marc Lecuit2

  • 1Institut Pasteur, Biology of Infection Unit, Paris, France; Inserm U1117, Paris, France.

Antiviral Research
|July 11, 2015
PubMed
Summary

Chikungunya virus (CHIKV) causes debilitating joint pain and fever, spreading globally. Research analyzes human data and models to understand CHIKV

Keywords:
ArbovirusArthralgiaChikungunya virusEmerging virusMosquito-borne

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Area of Science:

  • Virology and Infectious Diseases
  • Public Health and Epidemiology
  • Immunology and Host Response

Background:

  • Chikungunya virus (CHIKV) is a mosquito-borne arbovirus with a history of major outbreaks.
  • CHIKV has recently emerged in the Americas, posing a significant public health and economic threat.
  • The virus typically causes febrile illness with severe joint pain, which can become chronic and lead to arthritis.

Purpose of the Study:

  • To review the clinical signs and symptoms of Chikungunya virus infection in humans.
  • To explore how clinical data, cohort studies, and animal/cellular models elucidate CHIKV tropism and host responses.
  • To understand the mechanisms underlying benign, severe, and persistent CHIKV disease.

Main Methods:

  • Analysis of clinical and biological data from human cohorts.
  • Development and utilization of animal and cellular models of CHIKV infection.
  • Review of existing literature on CHIKV pathogenesis and clinical manifestations.

Main Results:

  • CHIKV infection presents with febrile illness and debilitating arthralgia, with potential for neurological complications in neonates.
  • Persistent joint symptoms and arthritis are common sequelae, affecting patients for months to years.
  • Studies have identified tissue and cellular tropisms of CHIKV and elucidated key host responses in different disease severities.

Conclusions:

  • Understanding the full spectrum of CHIKV infection is crucial for managing its public health impact.
  • Integrated approaches using human data and experimental models are vital for deciphering CHIKV pathogenesis.
  • Further research is needed to combat the growing threat of Chikungunya virus, especially in newly affected regions.