An outside investigator hired by the county characterized Duncan's actions as "an abhorrent and shocking violation of the standard of conduct expected of a department head, a law enforcement officer, an elected Sheriff, an employee of Chisago County. During this important transition time with our new public safety center, it is not fair to the county to not have an active leader in place. This is the third surgery on this foot.
This outbreak is over. The information on this page has been archived for historical purposes only and will not be updated. Posted January 17, Outbreak Summary On October 30,PulseNetthe national molecular subtyping network for foodborne disease surveillance, detected a multistate cluster of Salmonella Typhimurium infections with a particular pulsed-field gel electrophoresis PFGE pattern and other genetic characteristics, referred to here as strain X.
One was a student and the 2 others were children of students in microbiology courses held at two different community college campuses.
CDC collaborated with public health officials in several states to investigate this multistate cluster of Salmonella Typhimurium infections associated with exposure to clinical and teaching microbiology laboratories.
Investigators used DNA analysis of Salmonella bacteria obtained through diagnostic testing to identify cases of illness that might be related. Between August 20, and June 29,a total of individuals infected with strain X of Salmonella Typhimurium were reported from 38 states: Among persons with available information, illness onset dates range from August 20, to June 14, Infected individuals ranged in age from less than 1 year to 91 years old, and the median age was 21 years.
Sixty-one percent of patients were female. Twelve percent of patients were hospitalized. One death was reported. The timeline of infections can be visually described with a chart showing the number of persons who became ill each day. This chart is called an epidemic curve or epi curve. The expected baseline for strain X in PulseNet is approximately 0 to 4 cases reported per week.
Beyond these cases, Salmonella is an important cause of human illness in the United States. Investigation of the Outbreak In an epidemiologic study conducted during February and March32 ill persons answered questions about exposures during the days before becoming ill.
Investigators compared their responses with those of 64 persons of similar age previously reported to state health departments with other illnesses controls. Preliminary analysis of this study suggested that exposure to clinical and teaching microbiology laboratories was a possible source of illness.
Illnesses were identified among students in microbiology teaching laboratories and employees in clinical microbiology laboratories. Additionally, multiple ill persons reported working specifically with Salmonella bacteria in microbiology laboratories.
The New Mexico Department of Health found that the strain isolated from patients was indistinguishable by PFGE pattern from a commercially available Salmonella Typhimurium strain used in laboratory settings.
This commercially available strain was known to be present in several teaching or clinical laboratories associated with ill students or employees infected with the outbreak strain. These data suggest this strain was the source of some of these illnesses.
Additionally, several children who live in households with a person who worked or studied in a microbiology laboratory became ill with the outbreak strain.The investigation found Duncan "lied" to the co-worker, "directly causing her fear, embarrassment, and stress.".
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