Normal flora adhered on human’s body is generally harmless. Flora lives on the surface of the skin, respiratory tract, gastrointestinal tract, urogenital tract, and the vaginal flora of adult women. The types can be either resident (permanent) or transient (not permanent). These microorganisms have an important physiological role for our bodies and play a mutually beneficial symbiosis with each other (Groß, 2009, p. 73). A small portion of these microorganisms can become pathogenic, but our body has a defense mechanism which is efficient and quick to fight germs that enter without clinically significant emergence. When …show more content…
It is important to have a clean home environment (household sanitation) or keep the cleanliness of working place outside home as well as washing hand with soap and clean water, and having hygienic drinking water to prevent the spread of faecal pathogens that cause diarrheal diseases in the household (Badowski et al. 2011 ). Diarrhea which is not treated immediately may lead to death because of dehydration and decreasing body immune. World Health Organitation noted that diarrheal disease is the second cause of mortality worldwide which killed more than 800,000 people per year (Liu et al.,