Dear Manar Atoum this review will help you
Influenza viruses: update on epidemiology, clinical features, treatment and vaccination.
Kidd M.
Curr Opin Pulm Med. 2014 May;20(3):242-6. doi: 10.1097/MCP.0000000000000049. Review.
The BIRD FLU matters.
Please read the following:
Influenza A virus causes influenza in birds and some mammals, and is the only species of influenza virus A genus of the Orthomyxoviridae family of viruses. Strains of all subtypes of influenza A virus have been isolated from wild birds, although disease is uncommon. Some isolates of influenza A virus cause severe disease both in domestic poultry and, rarely, in humans. Occasionally, viruses are transmitted from wild aquatic birds to domestic poultry, and this may cause an outbreak or give rise to human influenza pandemics.
Influenza A viruses are negative-sense, single-stranded, segmented RNA viruses. The several subtypes are labeled according to an H number (for the type of hemagglutinin) and an N number (for the type of neuraminidase). There are 18 different known H antigens (H1 to H18) and 11 different known N antigens (N1 to N11). H17 was isolated from fruit bats in 2012. H18N11 was discovered in a Peruvian bat in 2013.
Each virus subtype has mutated into a variety of strains with differing pathogenic profiles; some are pathogenic to one species but not others, some are pathogenic to multiple species.
A filtered and purified influenza A vaccine for humans has been developed, and many countries have stockpiled it to allow a quick administration to the population in the event of an avian influenza pandemic. Avian influenza is sometimes called avian flu, and colloquially, bird flu. In 2011, researchers reported the discovery of an antibody effective against all types of the influenza A virus.
[https://en.wikipedia.org/wiki/Influenza_A_virus]
Signs of H1N1 are similar to common flu. What Viji viji has already mentioned. Unique feature of H1N1: a.Majority of human population has little or no previous exposure, b.Can infect lower respiratory tract & cause pneumonia. c. Host remain vulnerable to this infection again and again, since antigenic characteristics changes over time.
I think symptoms are much same as seasonal flu. These include; Cough, Fever, Sore throat, Stuffy or runny nose, Body aches, Headache, Chills and fatigue.
The symptoms of Novel H1N1 flu are similar to the symptoms seen during the regular human seasonal flu and include:
- fever greater than 100.4 degrees Fahrenheit
- cough
- sore throat
- body/muscle aches
- respiratory congestion
- quick onset of symptoms
A significant number of people who have been infected with this virus also have reported diarrhea and vomiting. Like seasonal flu, the Novel H1N1 flu may cause a worsening of underlying chronic medical conditions.
- Badges
- Science topic
- Similar topics
- Geoscience
- Asia
- India