January 12, 1987: A large outbreak of cryptosporidiosis began on this day. “Between January 12 and February 7, 1987, an outbreak of gastroenteritis affected an estimated 13,000 people in a county of 64,900 residents in western Georgia. Cryptosporidium oocysts were identified in the stools of 58 of 147 patients with gastroenteritis (39 percent) tested during the outbreak. Studies for bacterial, viral, and other parasitic pathogens failed to implicate any other agent. In a random telephone survey, 299 of 489 household members exposed to the public water supply (61 percent) reported gastrointestinal illness, as compared with 64 of 322 (20 percent) who were not exposed (relative risk, 3.1; 95 percent confidence interval, 2.4 to 3.9). The prevalence of IgG [Immunoglobulin G—an antibody isotype] to Cryptosporidium was significantly higher among exposed respondents to the survey who had become ill than among nonresident controls. Cryptosporidium oocysts were identified in samples of treated public water with use of a monoclonal-antibody test. Although the sand-filtered and chlorinated water system met all regulatory-agency quality standards, sub-optimal flocculation and filtration probably allowed the parasite to pass into the drinking-water supply. Low-level Cryptosporidium infection in cattle in the watershed and a sewage overflow were considered as possible contributors to the contamination of the surface-water supply. We conclude that current standards for the treatment of public water supplies may not prevent the contamination of drinking water by Cryptosporidium, with consequent outbreaks of cryptosporidiosis.”
Commentary: This outbreak caused a lot of concern in the drinking water community, but it was the epidemic of cryptosporidiosis in Milwaukee in April six years later that drove the second phase of the enhanced surface water treatment rule.
Reference: Hayes, E.B. et al. 1989. “Large community outbreak of cryptosporidiosis due to contamination of a filtered public water supply.” N. Engl J Med. 320:21(May 25): 1372-6.
January 12, 1870: Edward Bartow was born. “Edward Bartow (1870–1958) was an American chemist and an expert in the field of sanitary chemistry. His career extended from 1897 to 1958 and he is best known for his work in drinking water purification and wastewater treatment. He was well known as an educator, and his many students went on to leadership positions in the fields of sanitary chemistry and engineering….
He began his career as an instructor of chemistry at Williams College about 1896. His first academic appointment was as an assistant professor of chemistry at the University of Kansas. He taught there from 1897 to 1905. While in Kansas, he worked with the U.S. Geological Survey analyzing the waters of southeastern part of the state.
His next position was as Director of the Illinois State Water Survey. He also held the title of professor of sanitary chemistry at the University of Illinois from 1905 to 1920. He led efforts to eliminate typhoid fever by developing treatment methodologies for water purification. In 1914, he began the first large-scale investigations of the new sewage treatment process called activated sludge. A bronze plaque was placed on the grounds of the Champaign-Urbana Sanitary District to commemorate the work on this process done by Bartow and his colleagues. The Illinois State Water Survey became well known for producing high quality work and the fourteen volumes of bulletins and reports published during his tenure are classics in the field of sanitary chemistry and engineering.
From 1920 until his retirement in 1940, he was professor of chemistry at the University of Iowa. He significantly enhanced the department and when he left, the number of PhD degrees awarded totaled 240 in chemistry and chemical engineering….
Bartow received many honors including an honorary D.Sc. from Williams College in 1923. Several societies honored him with life memberships. In 1971, he was inducted into the American Water Works Association Water Industry Hall of Fame.”