About My Health Careers Internship MedBlogs Contact us
Medindia LOGIN REGISTER
Advertisement

H7N4: World's First Case of Bird Flu In China

by Julia Samuel on February 16, 2018 at 4:06 PM
Font : A-A+

H7N4: World's First Case of Bird Flu In China

H7N4, a new type of bird flu sets foot in China. A 68-year-old woman in southern China came down with the flu in December 2017 and eventually recovered after hospitalization, but she spent three weeks in the hospital.

"This is the first case of human infection with avian influenza A (H7N4) in the world," the Hong Kong Centre for Health Protection said.

Advertisement


The woman caught the virus from a live chicken, but there are no signs she spread it to anyone else. About Influenza

Influenza comes in three basic types: A, B, and C. The second two — influenza B and influenza C don't cause big problems. The trouble-makers are the influenza A strains. Among other things, influenza A viruses prefer hemagglutinin and neuraminidase. Hemagglutinin (H) and neuraminidase (N) are little protein spikes on the flu's surface that help it invade cells. There are 16 versions of hemagluttinin and nine for neuremanidase.
Advertisement

There are 144 different subtypes of influenza A: from H1N1 to H9N16. All of them exist in wild birds around the world, so they are all bird flu. But every now and then, one evolves the ability to infect other animals.

H1N1 is one of the more promiscuous. It can infect birds, people, pigs, and horses. H2N2, on the other hand, only makes its way into people and birds.

Why Are There so Many Types of Bird Flu?

Scientists call it reassortment. When a bird gets infected with two viruses: H1N1 and H2N2 the two viruses reproduce inside the bird's cells, H1N1 can grab accessories from H2N2. This creates a new strain that looks like H2N2 but can now infect people (because it started off as just H1N1).

That's what happened in 1957 during the Asian flu pandemic, says computational biologist Richard Goldstein, from the National Institute for Medical Research in London. Since H2N2 had never infected people before, our immune systems had never seen these accessories and thus, we had little defense against it. The new strain ended up killing roughly 70,000 Americans.

Scientists are still trying to figure out H7N9. So far, it looks like the virus got its H from ducks, its N from migratory birds and other genetic material from chickens.

Source: Medindia
Advertisement

Advertisement
News A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Advertisement
News Category
What's New on Medindia
World AIDS Day 2021 - End Inequalities, End AIDS
Turmeric: Magic Ingredient to Keep you Healthy in Winter
Top 7 Benefits of Good Oral Hygiene
View all

Medindia Newsletters Subscribe to our Free Newsletters!
Terms & Conditions and Privacy Policy.

More News on:
Bird Flu Swine Flu 

Recommended Reading
Bird Flu
Bird flu (avian influenza/avian flu) is a disease caused by an influenza virus (H5N1) that ......
A New Variant of Bird Flu Virus Causes Serious Infection
A newly detected variant of bird flu virus has been associated with serious lung infection, ......
A Bird's Eye View of The Bird Flu Scare
It might not be the plague yet, but the bird or avian flu scare has acquired this nasty habit of ......
Response to Bird Flu Spread Boosted By China
To prevent the spread of H7N9 avian influenza, which has killed six people in the country, ......
Swine Flu
Swine flu, a type of influenza caused by a new strain of the H1N1 Type A influenza virus has origina...

Disclaimer - All information and content on this site are for information and educational purposes only. The information should not be used for either diagnosis or treatment or both for any health related problem or disease. Always seek the advice of a qualified physician for medical diagnosis and treatment. Full Disclaimer

© All Rights Reserved 1997 - 2021

This site uses cookies to deliver our services. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use