gd55光大彩票

Use deionized water equipment to remove diseases caused by water

Generally, only cysts can be found in normal shaped stools, and trophozoites can be found in the stools of diarrhea patients. After the mature quadrinuclear cyst is swallowed by humans, it will decapsulate in the duodenum to form trophozoites through the action of gastric acid, and continue to proliferation. The survival time of cysts in the environment is affected by temperature. (Deionized water equipment) When the water temperature is lower than 10C, the cyst can survive at least 77 to 84 days in the water. When the water temperature was 20, 3 days or 37C, 1 day later, the number of active soups decreased significantly.

The disease has a worldwide distribution, especially in the temperate tropics. The prevalence of Giardiasis caused by drinking water pollution has been reported in the United States, Canada, the United Kingdom, Scotland, Sweden and other countries (regions). There were 104 reports of drinking water in the United States from 1965 to 1988.

Giardiasis caused an outbreak. The largest outbreak of Giardiasis in the United States occurred in Roma City, New York, with 395 symptomatic cases and an infection rate of 10.6%. The most noticeable outbreak of Giardiasis occurred in 1970. Leningrad's inquiry survey of 1,419 tourists to the former Soviet Union showed that 324 people had Giardiasis. (Deionized water equipment) The time from entering the former Soviet Union to the appearance of illness is 14 days, and the course of illness is 6 weeks. It was confirmed that Leningrad was an infectious area, and the infection rate was highest among tourists who had drunk raw tap water.