They found that like
other avian influenza viruses, the H7N9 viruses attached more strongly to lower parts of the human respiratory tract than to upper parts.
However, compared to
other avian influenza viruses, the attachment to epithelial cells by H7N9 in the bronchioles and alveoli of the lung was more abundant and the viruses attached to a broader range of cell types.
Not exact matches
In additional experiments, the scientists found that participants who had significant antibody responses did not necessarily also have significant immune system T cell responses to
avian viruses, indicating that these two arms of immunity can be independently boosted after vaccination or infection; that individuals who reported receiving seasonal
influenza vaccination had significantly higher antibodies to the
avian H4, H5, H6, and H8 subtypes; and that participants with exposure to poultry had significantly higher antibody responses to the H7 subtype, but to none of the
other subtypes tested.
The potential public health implication of this observation is that a person infected by H7N9
avian influenza virus who does not show symptoms could nevertheless spread the
virus to
others.
Avian flu (also «bird flu», «avian influenza», «bird influenza»), means «flu from viruses adapted to birds», but is sometimes mistakenly used to refer to both other flu subsets (such as H5N1 flu) or the viruses that cause them (such as H
Avian flu (also «bird flu», «
avian influenza», «bird influenza»), means «flu from viruses adapted to birds», but is sometimes mistakenly used to refer to both other flu subsets (such as H5N1 flu) or the viruses that cause them (such as H
avian influenza», «bird
influenza»), means «flu from
viruses adapted to birds», but is sometimes mistakenly used to refer to both
other flu subsets (such as H5N1 flu) or the
viruses that cause them (such as H5N1).
Most
avian influenza experts believe the
virus is spread primarily by trading in domestic poultry and the movement of crates and trucks unknowingly carrying contaminated droppings or
other materials.
They are a part of our first line of defense against diseases such as BSE (Mad Cow Disease), West Nile
Virus,
avian influenza and
others.