Some people think that polio is caused by shortage of vitamin. Substantively, polio is caused by virus, named poliovirus (PV). This virus come in to our body pass through our mouth and then infecting pipelines of intestines. This virus can also entrance to blood stream, flow in to system of centre nerve and weaken muscle and sometimes disablement (paralysis). Polio is infecting us by human contacts like eat and drink together. The poliovirus included in foods and beverages which contaminated with feces. The poliovirus is a little RNA virus that consist of three different strain and so infecting. This virus will attack nerve system and causing disablement in few hours. Fifty percent is happened on children who are between 3 to 5 years old. Because as we know, they are still not aware enough with hygine. Polio is consist of three strain, that is strain 1 (brunhilde), strain 2 (lanzig) and strain 3 (Leon). Strain 1 is the most vicious (paralitogenic) and oftentimes causing epidemic. This strain is often be found in Sukabumi. Whereas strain 2 is the most tame.
Children With Polio - Pic by www.ribi.org
Polio divided to three types, that is polio non-paralysis, polio paralysis spinal and polio bulbar. Polio non-paralysis causing fever, vomitting, stomachache, weak, sensitive and muscle cramps on neck and back. Polio paralysis spinal is a strain type which attack nerve system of backbone. Although this strain can causing permanent disablement. Less of one sufferer from 200 sufferer will suffering disablement, usually in the legs. Polio bulbar is caused by not exsistence of natural invulnerability, so that brain stem is attacked. It disturbing respiration system, eyes ball moving, hearing, and some system in disgestion. Without breathing assist instrument, polio bulbar can causing death. Five to ten percent of surferer who suffering polio bulbar will die when their breathing muscles can not work properly. Death usually happened after cranial nerve which send breathing command to the lungs was broken. The sufferer can also die because their swallowing function was broken. So that they need to doing suction for suck the secreted liquid before come in to the lungs.
Poliovirus can hold out for longtime in waste water and surface water, indeed in few kilometres from spreading source. The main spreading happened as a result of area was contaminated with poliovirus, but this virus lives in restricted area. High temperature can kill the virus quickly, but in low temperature or frozen condition, it can lives for a longtime.
Hopefully this article about polio could be useful 
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