Editing Cholera (section)

=== Sari filtration ===
{{Main|Cloth filter}} 
[[Image:Washing Utensils And Vegetables.png|Women at a village pond in [[Matlab, Bangladesh]], washing utensils and vegetables. The woman on the right is putting a sari filter onto a water-collecting pot (or [[Kalasha|kalash]]) to filter water for drinking.|thumb|240px]]

Developed for use in [[Bangladesh]], the "sari filter" is a simple and cost-effective [[appropriate technology]] method for reducing the contamination of drinking water. Used [[sari]] cloth is preferable but other types of used cloth can be used with some effect, though the effectiveness will vary significantly. Used cloth is more effective than new cloth, as the repeated washing reduces the space between the fibers. Water collected in this way has a greatly reduced [[pathogen]] count—though it will not necessarily be perfectly safe, it is an improvement for poor people with limited options.<ref name=Ram2010>{{cite book|author=Ramamurthy T|title=Epidemiological and Molecular Aspects on Cholera|year=2010|publisher=Springer|isbn=978-1-60327-265-0|page=330|url=https://books.google.com/books?id=X1DI0Easu2YC&pg=PA330|url-status=live|archive-url=https://web.archive.org/web/20151107134836/https://books.google.com/books?id=X1DI0Easu2YC&pg=PA330|archive-date=2015-11-07}}</ref> In Bangladesh this practice was found to decrease rates of cholera by nearly half.<ref name=Merr2010>{{cite book|author=Merrill RM|title=Introduction to epidemiology.|year=2010|publisher=Jones and Bartlett Publishers|location=Sudbury, MA|isbn=978-0-7637-6622-1|page=43|url=https://books.google.com/books?id=RMDBh6gw1_UC&pg=PA43|edition=5th|url-status=live|archive-url=https://web.archive.org/web/20151106194307/https://books.google.com/books?id=RMDBh6gw1_UC&pg=PA43|archive-date=2015-11-06}}</ref> It involves folding a ''sari'' four to eight times.<ref name=Ram2010 /> Between uses the cloth should be rinsed in clean water and dried in the sun to kill any bacteria on it.<ref>{{cite book|author=Starr C|title=Biology: Today and Tomorrow with Physiology|year=2007|publisher=Cengage Learning|isbn=978-1-111-79701-0|page=563|url=https://books.google.com/books?id=-bsFAAAAQBAJ&pg=PA563|edition=2|url-status=live|archive-url=https://web.archive.org/web/20151107022134/https://books.google.com/books?id=-bsFAAAAQBAJ&pg=PA563|archive-date=2015-11-07}}</ref> A [[nylon]] cloth appears to work as well but is not as affordable.<ref name=Merr2010 />