Publications

the epidemiology and clinical aspects of the hemolytic uremic syndrome in minnesota.	the frequency of the hemolytic uremic syndrome, characterized by microangiopathic hemolytic anemia, thrombocytopenia, and renal failure, is increasing. although escherichia coli serotype o157:h7 has been implicated as a causative agent, more information is needed about the basic epidemiology and clinical aspects of this syndrome.	1990	2215593
results of a 6-month survey of stool cultures for escherichia coli o157:h7.	escherichia coli o157:h7 is a recently recognized enteric pathogen that causes acute hemorrhagic colitis. although the infection is usually self-limited, it may be complicated by hemolytic uremic syndrome and thrombotic thrombocytopenic purpura. at our institution, stool specimens are now routinely cultured for this organism. to determine the prevalence of e. coli o157:h7-associated diarrhea in our patient population, we surveyed all submitted stool cultures for 6 months for this organism. speci ...	1990	2195241
surveillance of escherichia coli o157 isolation and confirmation, united states, 1988.	in 1989, to examine patterns of testing for escherichia coli o157:h7 in state public health laboratories (sphls), cdc conducted a survey to determine the availability and type of escherichia coli o157:h7 testing in sphls during 1988 and the number of isolates confirmed at sphls if such testing was available. the results were compared with information on isolates submitted for confirmatory testing at cdc in 1988. thirty-nine (78%) of the 51 sphls were testing for e. coli o157:h7 in 1988; 26 confi ...	1991	2023580
transmission of escherichia coli o157:h7 infection in minnesota child day-care facilities.	escherichia coli o157:h7 infection can cause hemorrhagic colitis and hemolytic uremic syndrome. since 1988 the minnesota department of health has carried out surveillance for this infection. to assess the occurrence of person-to-person transmission within day-care facilities, we investigated facilities where an infected child attended after onset of symptoms.	1993	8426447
surveillance by molecular subtype for escherichia coli o157:h7 infections in minnesota by molecular subtyping.	escherichia coli o157:h7 is a leading cause of diarrhea and the hemolytic-uremic syndrome. current public health surveillance for e. coli o157:h7 requires considerable resources; traditional methods lack the sensitivity and specificity to detect outbreaks effectively.	1997	9241128
incidence of foodborne illnesses reported by the foodborne diseases active surveillance network (foodnet)-1997. foodnet working group.	in 1997, the foodborne diseases active surveillance program (foodnet) conducted active surveillance for culture-confirmed cases of campylobacter, escherichia coli o157, listeria, salmonella, shigella, vibrio, yersinia, cyclospora, and cryptosporidium in five emerging infections program sites. foodnet is a collaborative effort of the centers for disease control and prevention's national center for infectious diseases, the united states department of agriculture's food safety and inspection servic ...	2000	10852576
prevalence of foodborne pathogens in bulk tank milk.	bulk tank milk from 131 dairy herds in eastern south dakota and western minnesota was examined for the presence of for foodborne pathogens. campylobacter jejuni, shiga-toxin producing escherichia coli, listeria monocytogenes, salmonella spp., and yersinia enterocolitica were detected in 9.2, 3.8, 4.6, 6.1, and 6.1% of bulk tank milk samples, respectively. thirty-five of 131 (26.7%) bulk tank milk samples contained one or more species of pathogenic bacteria. isolates of salmonella belonged to gro ...	2001	11699446
colonic necrosis and perforation secondary to escherichia coli o157:h7 gastroenteritis in an adult patient without hemolytic uremic syndrome.	during a multistate outbreak of escherichia coli o157:h7 diarrhea, we encountered a woman who had hemorrhagic colitis complicated by ischemic colitis with perforation. to our knowledge, this has not previously been described in adult patients. because of the insensitivity of the commonly used diagnostic methods, this condition may be underrecognized.	2002	12384855
multilocus variable-number tandem repeat analysis distinguishes outbreak and sporadic escherichia coli o157:h7 isolates.	escherichia coli o157:h7 is a major cause of food-borne illness in the united states. outbreak detection involves traditional epidemiological methods and routine molecular subtyping by pulsed-field gel electrophoresis (pfge). pfge is labor-intensive, and the results are difficult to analyze and not easily transferable between laboratories. multilocus variable-number tandem repeat (vntr) analysis (mlva) is a fast, portable method that analyzes multiple vntr loci, which are areas of the bacterial ...	2003	14662916
outbreak of escherichia coli o157:h7 infections associated with nonintact blade-tenderized frozen steaks sold by door-to-door vendors.	steaks have not been recognized as an important vehicle of escherichia coli o157:h7 infection. during 11 to 27 june 2003, the minnesota department of health (mdh) identified four o157 infection cases with the same pulsed-field gel electrophoresis (pfge) subtype. all four case patients consumed brand a vacuum packed frozen steaks sold by door-to-door vendors. the steaks were blade tenderized and injected with marinade (i.e., nonintact). information from single case patients in michigan and kansas ...	2005	15954707
longitudinal microbiological survey of fresh produce grown by farmers in the upper midwest.	microbiological analyses of fruits and vegetables produced by farms in minnesota and wisconsin were conducted to determine coliform and escherichia coli counts and the prevalence of e. coli, salmonella, and e. coli o157:h7. during the 2003 and 2004 harvest seasons, 14 organic farms (certified by accredited organic agencies), 30 semiorganic farms (used organic practices but not certified), and 19 conventional farms were sampled to analyze 2,029 preharvest produce samples (473 organic, 911 semiorg ...	2006	16924919
soil survival of escherichia coli o157:h7 acquired by a child from garden soil recently fertilized with cattle manure.	this investigation was conducted to determine the survival of a naturally occurring escherichia coli o157:h7 in garden soil linked to a sporadic case of e. coli o157 infection in minnesota.	2006	16882151
characteristics of o157 versus non-o157 shiga toxin-producing escherichia coli infections in minnesota, 2000-2006.	escherichia coli o157:h7 (o157) is the shiga toxin-producing e. coli (stec) serotype most frequently isolated and most often associated with hemolytic uremic syndrome (hus) in the united states. non-o157 stec serotypes can also cause serious illness, but their impact as pathogens remains undefined. we compared characteristics of non-o157 and o157 stec infections identified through sentinel surveillance.	2009	19548834
Dynamics of Escherichia coli O157:H7 outbreak detection and investigation, Minnesota 2000-2008.	SUMMARYWe determined characteristics of Escherichia coli O157:H7 pulsed-field gel electrophoresis clusters that predict their being solved (i.e. that result in identification of a confirmed outbreak). Clusters were investigated by the Minnesota Department of Health (MDH) using a dynamic iterative model. During 2000-2008, 19 (23%) of 84 clusters were solved. Clusters of ?3 isolates were more likely to be solved than clusters of two isolates. Clusters in which the first two case isolates were rece ...	2011	22093879
use of traceback methods to confirm the source of a multistate escherichia coli o157:h7 outbreak due to in-shell hazelnuts.	traceback methods by state regulatory agencies were used to complement traditional epidemiological cluster investigation methods and confirmed hazelnuts (also referred to as filberts) as the vehicle in a multistate outbreak of escherichia coli o157:h7 infections. bulk in-shell hazelnut and mixed-nut purchase locations were identified during the initial epidemiological interviews. based on purchase dates and case onset dates, regulators in minnesota, michigan, and wisconsin traced product back th ...	2012	22289593
ground beef handling and cooking practices in restaurants in eight states.	eating in table-service restaurants has been implicated as a risk factor for escherichia coli o157:h7 infection. to explore this association and learn about the prevalence of risky ground beef preparation practices in restaurants, the environmental health specialists network (ehs-net) assessed ground beef handling policies and practices in restaurants in california, colorado, connecticut, georgia, minnesota, new york, oregon, and tennessee. eligible restaurants prepared and served hamburgers. eh ...	2013	24290692