One study indicated that up to 12% of the world’s population may be infected by E. histololytica with 10% of those having clinical symptoms.² The most dramatic incident in the USA was the Chicago World’s Fair outbreak in 1933 caused by contaminated drinking-water.
The CDC reports during 1991-2000 Giardia was identified as a causal agent of 16.2% of reported drinking-water associated outbreaks of gastroenteritis of known or suspected infectious etiology. However, they do not remove bacteria such as giardia and cryptosporidium which are so famous for causing Montezuma’s Revenge.
Some people may have an immunity to some waterborne pathogens, due to resistance from a previous infection, or because they may already be an asymptomatic carrier of a protozoa, bacteria, or virus. Chlorine Dioxide at a concentration of 4 PPM (parts per million) has been demonstrated to kill Cryptosporidium, but it can take up to 4 hours in cold dirty water.
Even the Safe Drinking Water Act, a law dating from the 1970s, does not regulate thousands of chemicals found in drinking water today. Protozoa are also the largest and easiest microorganism to remove with microfiltration, but the hardest to kill with chemicals.
Thirdly, and most important, run your microfiltered water through activated charcoal, (part of most, but not all microfilter systems) which will remove most of the toxins. Every year, while purificadoras de agua doing employee clinics for Katadyn in retail stores in the western U.S., I hear from various people who have been infected with disease causing organisms from backcountry water sources.
There are three general classifications of waterborne disease-causing microorganisms. I see these people as a very small percentage of those that have been infected, since for the most part only those males who become extremely ill go to a doctor and have the disease diagnosed.
Unfortunately, because these people can drink some backcountry water without becoming ill: they either assume there are not infectious microorganisms in the water, or they believe whatever unsafe method of treatment they employ removes infectious microorganisms.
One study indicated that up to 12% of the world’s population may be infected by E. histololytica with 10% of those having clinical symptoms.² The most dramatic incident in the USA was the Chicago World’s Fair outbreak in 1933 caused by contaminated drinking-water.
I want the cleanest healthiest , bacteria free drinking water I can get Please let me know who and what system you recommend for me please. My thanks to: the very valuable information on waterborne diseases on the web sites of the Center for Disease Control (CDC) and the Food & Drug Administration (FDA), especially their “Bad Bug Book” site.
2. Waterborne Protozoan Pathogens, Marshall, Naumovitz, Ortega, & Sterling, U. of Arizona. UV filters are one of the newest technologies, however they are becoming more and more popular—especially in the field of atmospheric water generation. They may now have resistance to those protozoa from earlier infections, or carry one or both of these protozoa in their intestines without showing serious symptoms (estimates are up to 15% of infected people may be asymptomatic carriers).
People drinking water downstream from where livestock, or in some cases where wild animals, have been defecating: are also at risk of catching these bacteria. Cryptosporidium may be just as common as Giardia. This is a system that connects to your water intake and filters all incoming water to your home at the source.