What is the natural reservoir for influenza A viruses?
Wild aquatic birds and shorebirds form the natural virus reservoir. All influenza virus subtypes and almost all possible haemagglutinin/neuraminidase combinations have been detected in wild birds, whereas relatively few have been detected in humans and other mammals.
What is the most important reservoir for interspecies transmission of influenza A?
Reservoir, Vector & Host for the Virus
Pigs are the most important reservoir for influenza A viruses, acting as an intermediary host for both interspecies transmission and genetic reassortment.
What is the original host of influenza A?
In 2009, a novel influenza A(H1N1) virus was the cause of a worldwide pandemic. This virus possessed a unique combination of gene segments, including genes that originated from swine, avian, and human influenza viruses that were established in pigs in North America and Europe (see Fig. 31.2).
What are the 3 most common reservoirs for influenza A?
The primary reservoir for influenza A viruses is wild waterfowl and other wild birds, but viruses are common in domestic poultry and swine populations as well. Influenza A viruses can also infect other animal species, such as cats, dogs, horses, ferrets, sea lions, and bats.
Is influenza A virus or bacteria?
What is Influenza (Flu)? Flu is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and sometimes the lungs. It can cause mild to severe illness, and at times can lead to death.
Is influenza spread by contact?
Person to Person
People with flu can spread it to others up to about 6 feet away. Most experts think that flu viruses spread mainly by droplets made when people with flu cough, sneeze or talk. These droplets can land in the mouths or noses of people who are nearby or possibly be inhaled into the lungs.
What animals are considered the reservoir for influenza A viruses quizlet?
Influenza A viruses have infected many different animals, including ducks, chickens, pigs, whales, horses, and seals.
What is Type A virus?
Type A flu or influenza A viruses are capable of infecting animals, although it is more common for people to suffer the ailments associated with this type of flu. Wild birds commonly act as the hosts for this flu virus. Type A flu virus is constantly changing and is generally responsible for the large flu epidemics.
Does the flu shot protect against influenza A or B?
All flu vaccines in the United States are “quadrivalent” vaccines, which means they protect against four different flu viruses; an influenza A(H1N1) virus, an influenza A(H3N2) virus, and two influenza B viruses.