Bird Flu: A recent threat to human health
نویسنده
چکیده
Description: With more than 100 million birds either dead from infection or culled, the present outbreak of avian influenza in Asia is unprecedented in size. Influenza virus belongs to the viral family, Orthomyxoviridae having single-stranded RNA genome in an enveloped virion. These viral particles are pleiomorphic and many of them are spherical or ovoid with 80-120 nm diameter. However, other forms including long filamentous particles (up to 2000 nm long x 80-120 nm in diameter) are also known. [1, 2] The outer surface of the particle consists of a lipid envelope with prominent glycoprotein spikes of two types (haemagglutinin (HA), a 135Å trimer and neuraminidase (NA), a 60Å tetramer). The inner side of the envelope is lined by a matrix protein. [1] The H5N1 sub-type is the pathogenic avian viral sub-type that has been documented to cause an outbreak of respiratory disease in humans. [3] Earlier studies revealed that chickens infected with the H5N2 virus failed to show evidence of human infection.
منابع مشابه
Alarm bells ring over bird flu threat
Recent cases of bird flu infecting humans in southeast Asia have raised fears about the possibility of a new strain of human flu that could spark a pandemic. The new outbreaks of the influenza virus (strain H5N1) in poultry in Asia were linked by sporadic reporting of human cases of infection with this virus in Vietnam and Thailand last year. By the end of last month, there had been 54 cases of...
متن کاملآنفلوانزای پرندگان (مقاله مروری)
The purpose of this paper is to provides general information about avian influenza (bird flu) and specific information about one type of bird flu, called avian influenza A (H5N1), that has caused infections in birds in Asia and Europe and in human in Asia. The main materials in this report are based on the World Health Organization (WHO) , world organization for animal health (OIE) , food and a...
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The spread of influenza viruses in multiple bird and mammalian species is a worldwide serious threat to human and animal populations' health and raise major concern for ongoing pandemic in humans. Direct transmission of the avian viruses which have sialic acid specific receptors similar to human influenza viruses are a warning to the emergence of a new mutant strain that is likely to share mole...
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The appearance of the H5N1 strain of bird flu in Europe, and particularly the outbreak reported last month in Turkey, has heightened already raised concerns about the spread of the virus and its potential to seed the next human pandemic. There are new worries about how the disease appeared to infect birds almost simultaneously in 13 provinces scattered around Turkey and further concerns about w...
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عنوان ژورنال:
- Bioinformation
دوره 1 شماره
صفحات -
تاریخ انتشار 2006