Eating with hand without spoon is more scientific

Eating with hand is always beneficial and scientific than eating with a spoon. It will be slight difficult to make understand a non medical person in this respect. Still if we clarify it simply that, we have many bacteria in our body- on the skin, in mouth, intestine called normal flora. Normal flora are usually harmless and protect us from many harmful bacteria from outside environment. We get these normal flora starting from after birth from mother skin and hands. Gradually many types of normal flora clonizes on different parts of our body. Maintenance of this colonization is needed for better health by updating the type of normal flora in our gut. If one use spoon (clean- bacteria free) for long time or drinks bottle water ( which is bacteria free) ultimately his pattern of normal flora will be changed or loss its current code of normal flora in the gut and he will loss his concomitant immunity to environmental bacterial pathogens. This type of people if suddenly exposed to a environment where water contains some sorts bacteria( that is not harm full to local people) will suffer a lot from gastroenteritis. As for example, in our country when some people come from abroad after several years of staying there mostly suffer from acute gastroenteritis within few days of coming here. Similarly when people from urban area visit their village after a long period also suffer with similar disease. Where as local people don't suffer from the disease with same foods and drinks or water.
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Water Filter and Viral Hepatitis

Water borne viral hepatitis (A, E) is a common problem in Dhaka and other areas of Bangladesh and also in many other countries. There are many causes for the present situation. It is partly due to the lack of knowledge of water purification. Boiling is best among the all methods but it needs a setup of heating appliance. So, many people think that water filters, those are used in Bangladesh are safe. Actually water filters without UV or heating can't prevent viral infection because size of virus is very very small and its access can not be prvented by the common filters. Without UV or heating some good types of filters can prevent parasitic disease and some times bacterial infections like salmonella, vibrio or shigella which are responsible for enteric fever or gastroentritis respectively. Moreover, one can easily observe that there is no BSTI logo for quality of these filters in Bangladesh. So these filters are not helping rather misleading the people. General people using the filtered water with a good faith and are suffering. Boiling is very good but if not availble then use of chlorine tablet or liquid is more helpfull then filter.