h5n1 22

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Period AP 4 Bio :

Period AP 4 Bio W e i J i a n is proud to present

The H5N1 Virus:

The H5N1 Virus

Introduction:

Introduction 3 different classes of influenza virus: type a, b, and c. Influenza A virus can fake human and animals . Influenza B and C can only affect humans . Influenza A virus subtype H5N1, also known as " bird flu ", is a subtype of the influenza A virus which can cause illness in humans and many other animal species. A bird-adapted strain of H5N1, called HPAI A(H5N1); is the causative agent of H5N1 flu. Influenza viruses have a relatively high mutation rate that is characteristic of RNA viruses. The segmentation of its genome facilitates genetic recombination by segment reassortment in hosts infected with two different influenza viruses at the same time.

Structure:

Structure The H5N1 subtype is a RNA virus. It is a spherical structure. It has a segmented genome of eight negative sense, and a single-strands of RNA, abbreviated as PB2, PB1, PA, HA, NP, NA, MP and NS.

Prevalence:

Prevalence

Hosts and the cells it infects:

Hosts and the cells it infects In addition to human and birds , we know that pigs , tigers , leopards , ferrets and domestic cats can be infected with avian fluenza A (H5N1) viruses . At present, H5 viruses can only infect one of the two main types of cell in the mouth and nose, a type of cell known as a ciliated cell. In order for H5 to transmit from human to human, it would need to be able to infect the other, non-ciliated type of cell as well.

Disease and SYmptoms:

Disease and SYmptoms The H5N1 virus causes bird flu . Symptoms include fever, cough, sore throat, muscle aches, conjunctivitis, and, in severe cases, breathing problems and pneumonia that may be fatal. The WHO indicates 60% of cases classified as H5N1 resulted in death

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Bird Flu

Treatment for Disease:

Treatment for Disease There is no highly effective treatment for H5N1 flu, but Tamiful (a oseltamivir0 can sometimes inhibit the influenza virus from spreading inside the user’s body. There are several H5N1 vaccines for several of the avian H5N1 varieties, but the continual mutation of H5N1 renders them of limited use to date.

Reference::

Reference : http://en.wikipedia.org/wiki/Influenza_A_virus_subtype_H5N1 http://www.gate2biotech.com/proc-ptaci-chripka-nezpusobila-pandemii/ http://www.cdc.gov/flu/avian/gen-info/facts.htm

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