Criticism grew after Harvard’s Dr. Michael Mina told the New York Times last month about his concerns over test results with cycle levels of 30 or more. He argued for lower cycle thresholds but increased and more rapid testing, including of asymptomatic people who can spread the virus without knowing it.
A Canadian study this spring underscored his concerns, because researchers for the most part could not grow viral cultures from samples in COVID-19 patients whose positive PCR tests required more than 25 cycles or whose symptoms had occurred more than seven days prior to testing.
The takeaway shouldn’t be to reduce PCR testing or cycle thresholds, though, because all positive cases inform health officials as they conduct contact tracing and try to contain an outbreak, said Dr. Jared Bullard, a lead author and assistant medical director of the Cadham Provincial Laboratory in Winnipeg that conducts COVID-19 testing.
Cycle thresholds vary and are set by manufacturers based on the validated limits by which their tests are accurate.
Related: Catholic schools will sue Dane County Madison Public Health to open as scheduled
Notes and links on Dane County Madison Public Health. (> 140 employees).
Molly Beck and Madeline Heim:
which pushed Dane County this week not to calculate its percentage of positive tests — a data point the public uses to determine how intense infection is in an area.
While positive test results are being processed and their number reported quickly, negative test results are taking days in some cases to be analyzed before they are reported to the state.
The department said it was between eight and 10 days behind in updating that metric on the dashboard, and as a result it appeared to show a higher positive percentage of tests and a lower number of total tests per day.
The department said this delay is due to the fact data analysts must input each of the hundreds of tests per day manually, and in order to continue accurate and timely contact tracing efforts, they prioritized inputting positive tests.
“Positive tests are always immediately verified and processed, and delays in processing negative tests in our data system does not affect notification of test results,” the department said in a news release. “The only effect this backlog has had is on our percent positivity rate and daily test counts.”
Staff have not verified the approximately 17,000 tests, which includes steps such as matching test results to patients to avoid duplicating numbers and verifying the person who was tested resides in Dane County.
All 77 false-positive COVID-19 tests come back negative upon reruns.
Madison private school raises $70,000 for lawsuit against public health order. – WKOW-TV. Commentary.
WEAC: $1.57 million for Four Wisconsin Senators
Assembly against private school forced closure.
Wisconsin Catholic schools will challenge local COVID-19 closing order. More.
2017: West High Reading Interventionist Teacher’s Remarks to the School Board on Madison’s Disastrous Reading Results
Madison’s taxpayer supported K-12 school district, despite spending far more than most, has long tolerated disastrous reading results.
My Question to Wisconsin Governor Tony Evers on Teacher Mulligans and our Disastrous Reading Results
“An emphasis on adult employment”
Wisconsin Public Policy Forum Madison School District Report[PDF]
Booked, but can’t read (Madison): functional literacy, National citizenship and the new face of Dred Scott in the age of mass incarceration