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Testing Results
Testing
TRACE OSU tests students, faculty and staff at campuses in Corvallis and Bend and at the Hatfield Marine Science Center in Newport. Participation is voluntary and open to all current members of the OSU community who reside close enough to be tested. Individuals are randomly selected from each group to estimate the actual prevalence of the novel coronavirus in each location.
NOTE: The results below differ from those shown on OSU’s COVID-19 website, which include the weekly number of confirmed and presumptive COVID-19 cases as provided to the university by the Benton County Health Department involving students, faculty and staff affiliated with Oregon State University’s Corvallis campus. While the health department includes TRACE OSU data, the county’s numbers also include testing results and presumptive cases from other health-care providers in Benton County. TRACE OSU reports only results from the TRACE project.
Number of positive cases in the previous week (October 12–16)
2
students
living on or near Corvallis campus
5
faculty and staff
living on or near Corvallis campus
0
students and employees
living on or near OSU-Cascades
1
students and employees
living on or near HMSC
Number of tests completed in the previous week (October 12–16)
509
students
living on or near Corvallis campus
465
faculty and staff
living on or near Corvallis campus
122
students and employees
living on or near OSU-Cascades
94
students and employees
living on or near HMSC
Cumulative number of tests since the beginning of the program (as of October 16)
1161
students
living on or near Corvallis campus
1136
faculty and staff
living on or near Corvallis campus
188
students and employees
living on or near OSU-Cascades
168
students and employees
living on or near HMSC
Percentage of tests that were positive (as of October 23)
The number of positive test results divided by the total number of tests that were run during the previous fourteen calendar days.
0.29%
students
living on or near Corvallis campus
0.54%
faculty and staff
living on or near Corvallis campus
0%
students and employees
living on or near OSU-Cascades
1.04%
students and employees
living on or near HMSC
Prevalence
Prevalence is a leading indicator of the risk posed by the coronavirus in a community. Higher prevalence means that more people carry the virus, and therefore your risk of contracting it is higher. Prevalence is a statistical measure that takes into account sampling design, and reliability of the tests.
TRACE OSU prevalence estimate (for week of October 12–16)
An estimate of the fraction of the population who are infected with the virus during the week the samples were collected. Prevalence differs from percent positivity because it adjusts for factors such as the sampling design and reliability of the test. We report prevalence as the number of people in the population that are infected per 1000 individuals.
7
per 1,000
OSU students living on or near Corvallis campus
18
per 1,000
OSU faculty and staff living on or near Corvallis campus
—*
No positive cases observed this week
OSU students and employees living on or near OSU-Cascades
18
per 1,000
OSU students and employees living on or near HMSC
* No positive cases observed this week. There may still be positive cases among this demographic.
TRACE Community prevalence estimate
An estimate of the fraction of the population who are infected with the virus during the week the samples were collected. Prevalence differs from percent positivity because it adjusts for factors such as the sampling design and reliability of the test. We report prevalence as the number of people in the population that are infected per 1000 individuals.
3
in 1000
in Corvallis on September 26 and 27
1
in 1000
in Bend on May 30 and 31
6
in 1000
in Newport on July 11 and 12
169
in 1000
in Hermiston on July 11 and 12
Wastewater sampling
Since all people who use toilet facilities contribute to wastewater flow, TRACE samples wastewater in communities and at OSU to complement individual testing. Wastewater provides another indication of the presence of the coronavirus in the region being sampled. Samples from wastewater in communities and OSU are analyzed at OSU.
OSU Wastewater score
OSU wastewater analysis results will be posted on this website the week of October 19.
Community wastewater scores
The data represented on this graph show the level and change in coronavirus concentrations found within wastewater collected from the city of Corvallis wastewater treatment plant.
Higher concentrations suggest greater numbers of COVID-19 infections at that time within the Corvallis community, while lower concentrations suggest fewer COVID-19 infections. Green circles on the graph indicate that the concentration of the virus was so low that it was below the limit of detection in the wastewater sample. The latest sampling dates were 9/28/20 and 9/29/20.
The data represented on this graph show the level and change in coronavirus concentrations found within wastewater collected from the city of Newport wastewater treatment plant.
Higher concentrations suggest greater numbers of COVID-19 infections at that time within the Newport community, while lower concentrations suggest fewer COVID-19 infections. Green circles on the graph indicate that the concentration of the virus was so low that it was below the limit of detection in the wastewater sample.
The data represented on this graph show the level and change in coronavirus concentrations found within wastewater collected from the city of Bend wastewater treatment plant.
Higher concentrations suggest greater numbers of COVID-19 infections at that time within the Bend community, while lower concentrations suggest fewer COVID-19 infections. Green circles on the graph indicate that the concentration of the virus was so low that it was below the limit of detection in the wastewater sample.