Related Experiment Video

Updated: May 5, 2026

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

14.8K

Surveillance for avian influenza A(H7N9), Beijing, China, 2013

Peng Yang, Xinghuo Pang, Ying Deng

    Emerging Infectious Diseases
    |November 27, 2013
    PubMed

    Insights

    Avian influenza A(H7N9) virus was detected in four individuals in Beijing, China, with varying symptoms. Surveillance of poultry and environments did not find evidence of the virus in Beijing.

    Area of Science:

    • Virology
    • Epidemiology
    • Public Health

    Background:

    • Pneumonia of unknown etiology surveillance is crucial for emerging infectious diseases.
    • Sentinel hospital-based surveillance aids in early detection of novel pathogens.

    Purpose of the Study:

    • To report the detection of avian influenza A(H7N9) virus in humans in Beijing.
    • To investigate the potential source and presence of avian influenza A(H7N9) in the local environment.

    Main Methods:

    • Conducted surveillance for pneumonia of unknown etiology.
    • Implemented sentinel hospital-based surveillance.
    • Collected and tested samples from humans, poultry workers, environments, and wild birds.

    Main Results:

    • Four cases of avian influenza A(H7N9) virus infection were identified in individuals presenting with pneumonia, influenza-like illness, or asymptomatic infection.
    • Surveillance of poultry, associated environments, and wild birds in Beijing did not yield positive results for the avian influenza A(H7N9) virus.

    Conclusions:

    • Avian influenza A(H7N9) virus has been detected in human infections in Beijing.
    • Current evidence suggests the virus may not be circulating in the poultry population or environments within Beijing at the time of the study.
    Keywords:
    BeijingChinaavian influenzaavian influenza virusinfluenzainfluenza A(H7N9) virussurveillanceviruses

    More Related Videos

    Avian Influenza Surveillance with FTA Cards: Field Methods, Biosafety, and Transportation Issues Solved12:09

    Avian Influenza Surveillance with FTA Cards: Field Methods, Biosafety, and Transportation Issues Solved

    Published on: August 2, 2011

    23.8K
    Preparation of Pseudo-Typed H5 Avian Influenza Viruses with Calcium Phosphate Transfection Method and Measurement of Antibody Neutralizing Activity07:15

    Preparation of Pseudo-Typed H5 Avian Influenza Viruses with Calcium Phosphate Transfection Method and Measurement of Antibody Neutralizing Activity

    Published on: November 22, 2021

    2.3K

    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...
    101
    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...
    97
    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...
    33.2K
    Principles of Disease Surveillance01:26

    Principles of Disease Surveillance

    Disease surveillance is the systematic collection, analysis, and interpretation of health data essential to the planning, implementation, and evaluation of public health practice. This process integrates data dissemination to entities responsible for preventing and controlling disease, injury, and disability. Surveillance systems provide crucial information for action, helping public health authorities make informed decisions to manage and prevent outbreaks, ensure public safety, optimize...
    856