USA: The Centers for Disease Control and Prevention (CDC) has said that 17 people in eight states have been sickened with a strain of E. coli. The reports of the illness started on December 11, 2018, to April 18, 2019 and affected people ages 7 to 86. Epidemiologic and laboratory evidence indicates flour is a likely source of this outbreak.
Symptoms of E. coli can vary in people, but often include severe stomach cramps, diarrhea (often bloody), and vomiting, according to the CDC. Most people get better within 5 to 7 days and sustain a mild infection, but others can be severe or life-threatening. Some people with Shiga toxin-producing E. coli (STEC) infection may get a type of kidney failure called hemolytic uremic syndrome.
In the US, from 2000 to 2014, close to 500 outbreaks of waterborne illnesses were reported in recreational venues in 46 states and Puerto Rico, causing 27,219 cases of sickness and eight deaths. Pool chemicals can take care of many problems, but not always. Getting optimal results for safety comes down to having the right balance. It comes down to having the right users, those who adhere to the proper pool etiquette.
Most of the illnesses in pools, hot tubs and water playgrounds are caused by Cryptosporidium, a parasite that causes Cryptosporidiosis, which leads to diarrhea.
Crypto is spread by swallowing water that has been contaminated with fecal matter. Most germs are killed within minutes by common pool disinfectants like chlorine or bromine, but Crypto is a germ that can survive in properly chlorinated water for more than seven days. The diarrhea it causes can last for up to three weeks. And the number of Crypto cases have been steadily rising, with twice as many in 2016 as in 2014.