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Avian Flu (Deadly Diseases and Epidemics) by Jeffrey N Sfakianos

By Jeffrey N Sfakianos

This carrying on with sequence explores diversified illnesses to teach the technology at the back of how disease-causing organisms have an effect on the physique. Microorganisms have plagued people because the starting of time, inflicting debilitating ailments or even loss of life. yet how, precisely, do those microorganisms infect and reason illness? The books during this sequence research a number of microbiological scourges that experience affected people in addition to the stairs which were taken to spot, isolate, hinder, and remove them. each one name will define the historical past and coverings of the illnesses, highlighting how advancements in prevention and remedy suggestions have affected the disease's influence at the global inhabitants. sometimes called the chook flu, avian influenza is a sickness that when contaminated basically birds yet has got the power to contaminate people with lethal effects.

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Extra resources for Avian Flu (Deadly Diseases and Epidemics)

Sample text

The process by which an organism gains these beneficial characteristics is called adapation. Adaptation is a critical component of evolution. The virus could eventually evolve to evade the host’s immune system, to a point where it sufficiently mimics the host’s own cellular components. This could be achieved by modification of the surface of the virus’s components to look like those of the host, such as by the addition of an exterior shield designed to resemble the glycoproteins that cover the host’s cells.

Q 44 3/6/08 8:58 AM Page 44 AVIAN FLU half of the story since it only describes the way that tolerance by the host is generated. The other half of the story is that the virus itself becomes less virulent, or less able to cause disease. Experimental devices have demonstrated that a virus does actually adapt to the cells it infects so that continued replication is optimized. The selection of viruses that can maintain replication is probably achieved through a simple mechanism. If the virus becomes overly virulent, the long-term survival of the viruse is at risk.

The icosahedral shape of the adenovirus also conveys advantages to the virus. The shape of the virus is formed by only a limited number of different protein molecules. The molecules are arranged into units of hexamers (6-sided shapes). These hexamers are ordered to form a larger triangle, which comes together around a pentameric (5-sided) vertex. The resulting assembly of the triangles around the pentameric vertex is an icosahedral shape that is extremely stable and capable of withstanding harsh conditions inside and outside of the body.

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