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Related Concept Videos

Influenza01:27

Influenza

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...
Viral Recombination00:57

Viral Recombination

Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
Infectious Diseases and Their Occurrence01:28

Infectious Diseases and Their Occurrence

Infectious diseases appear in populations through various transmission patterns, influenced by pathogen characteristics, population immunity, environmental conditions, and social behavior. Understanding these patterns is essential for effective public health surveillance and intervention. These categories—sporadic, outbreak, epidemic, pandemic, and endemic—help frame the nature and scope of disease events.Sporadic diseases occur irregularly and infrequently, without a predictable temporal or...
Viral Mutations00:36

Viral Mutations

A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material for adaptive...
Coronavirus01:29

Coronavirus

Coronaviruses, including the severe acute respiratory syndrome coronavirus (SARS-CoV), are enveloped viruses characterized by their single-stranded, positive-sense RNA genome and helical nucleocapsid structure. The hallmark of these viruses is their club-shaped spike (S) glycoproteins that protrude from the viral envelope, facilitating attachment to host cells. Typically, coronaviruses infect the upper respiratory tract, often causing mild or asymptomatic disease. However, certain strains like...
Inhibitors Of Virion Release01:25

Inhibitors Of Virion Release

Viral replication and dissemination rely on efficient mechanisms for host cell entry, genome replication, assembly, and release. Influenza viruses, such as types A and B, are negative-sense single-stranded RNA viruses with a segmented genome, that depend on two critical surface glycoproteins to carry out these processes: hemagglutinin (HA) and neuraminidase (NA). HA initiates infection by binding to sialic acid residues on the surface of host epithelial cells, facilitating receptor-mediated...

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Nasal Wipes for Influenza A Virus Detection and Isolation from Swine
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Nasal Wipes for Influenza A Virus Detection and Isolation from Swine

Published on: December 4, 2015

Avian influenza: current scenario.

Varsha Gupta1, Nidhi Singla

  • 1Department of Microbiology, Government Medical College Hospital, Chandigarh. varshagupta_99@yahoo.com

The Journal of Communicable Diseases
|July 8, 2009
PubMed
Summary
This summary is machine-generated.

Avian influenza, or bird flu, poses a significant global threat due to its pandemic potential and human immunity gaps. Developing an effective influenza vaccine is a critical public health priority to prevent future outbreaks.

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Rapid Diagnosis of Avian Influenza Virus in Wild Birds: Use of a Portable rRT-PCR and Freeze-dried Reagents in the Field

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Influenza Virus Propagation in Embryonated Chicken Eggs
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Influenza Virus Propagation in Embryonated Chicken Eggs

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Last Updated: Jun 21, 2026

Nasal Wipes for Influenza A Virus Detection and Isolation from Swine
05:59

Nasal Wipes for Influenza A Virus Detection and Isolation from Swine

Published on: December 4, 2015

Rapid Diagnosis of Avian Influenza Virus in Wild Birds: Use of a Portable rRT-PCR and Freeze-dried Reagents in the Field
08:46

Rapid Diagnosis of Avian Influenza Virus in Wild Birds: Use of a Portable rRT-PCR and Freeze-dried Reagents in the Field

Published on: August 2, 2011

Influenza Virus Propagation in Embryonated Chicken Eggs
06:56

Influenza Virus Propagation in Embryonated Chicken Eggs

Published on: March 19, 2015

Area of Science:

  • Veterinary Medicine
  • Epidemiology
  • Public Health

Background:

  • Avian influenza (bird flu) has caused millions of deaths through three major pandemics in the 20th century.
  • The H5N1 strain, active since 1997, is a growing concern, especially with its confirmed link to migratory birds.
  • The virus's high capacity for genetic reassortment and lack of human immunity heighten pandemic fears.

Purpose of the Study:

  • To highlight the urgent need for an effective influenza vaccine.
  • To emphasize the public health priority of pandemic preparedness.
  • To discuss the current limitations in treating avian influenza.

Main Methods:

  • Review of historical avian influenza pandemics and current H5N1 strain activity.
  • Analysis of the virus's genetic properties and implications for human immunity.
  • Assessment of current therapeutic options and vaccine development needs.

Main Results:

  • Avian influenza, particularly the H5N1 strain, represents a continuous and evolving global health risk.
  • The virus's genetic adaptability poses a significant challenge, as humans generally lack immunity.
  • Neuraminidase inhibitors are the only current treatment option for a potential pandemic.

Conclusions:

  • The timely development and implementation of an effective influenza vaccine is essential.
  • Avian influenza prevention and control must be a global public health priority.
  • Proactive measures are crucial to mitigate the impact of potential influenza pandemics.