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en.wikipedia.org/wiki/Presumptive_and_confirmatory_tests

Confirmatory tests cost more than simpler presumptive tests so presumptive tests are often done to see if confirmatory tests are necessary. Similarly, in medicine, a presumptive diagnosis identifies the likely condition of a patient, and a confirmatory diagnosis is needed to confirm the condition.

www.sog.unc.edu/sites/www.sog.unc.edu/files/course_materials/Presumptive and...

Presumptive and Confirmatory Forensic Tests Definitions: Presumptive tests - can establish the possibility that a substance, bodily tissue or fluid is present Confirmatory tests - are used to conclusively identify a substance or specific biological material References: President’s DNA Initiative (for serology tests)

sites.law.duke.edu/forensicsforum/2017/03/17/an-overview-of-presumptive-and...

Presumptive tests must generally be sensitive and confirmatory tests must generally be specific. Kobilinsky, Liotti, and Oeser-Sweat wrote, “Initially a presumptive screening test is used to identify the evidence. Presumptive tests are usually sensitive but not specific, and thus small amounts of the substance can be detected.

www.cteresource.org/verso/courses/8409/forensic-technology-tasklist/1053453292

Describe the difference between presumptive testing and confirmatory testing. Definition Description should include the definitions of . presumptive testing—chemical analysis of a sample that establishes the possibility that a substance is present; confirmatory testing—identification of the specific substance through further chemical analysis.; Process/Skill Questions

www.wwltv.com/article/news/health/coronavirus/coronavirus-what-is-a...

Currently, presumptive positive cases must have sample undergo confirmatory testing at the CDC. Laboratory-confirmed case of COVID-19: Anyone who has tested positive for the virus at the CDC ...

www.nj.com/coronavirus/2020/03/what-does-a-presumptive-positive-coronavirus...

Officials confirmed Thursday that a man from Fort Lee in Bergen County is the first person in New Jersey to have a presumptive positive test result for COVID-19, the disease caused by the coronavirus.

www.pennlive.com/news/2020/03/what-is-the-difference-between-a-presumptive...

Presumptive Positive: This is a person who tested positive for COVID-19 at a state or local laboratory. At least one respiratory sample must be positive for a case to be labeled presumptive positive.

www.reviewmed.com/presumptive-vs-confirmatory-drug-testing-which-is-appropriate

The problems with that are 1) the more drugs they test for, the more they can charge which potentially leads to excessive testing on multiple patients; and 2) ODG recommendations are that confirmatory testing only be done if the presumptive qualitative testing shows inconsistencies, other red flags, or the claimant is considered high risk for ...

www.sog.unc.edu/courses/webinars/presumptive-and-confirmatory-forensic-tests

"Presumptive and Confirmatory Forensic Tests" provides basic instruction on the difference between these two types of forensic evidence tests and explains why this distinction is so important. Participants will see examples of laboratory reports and learn about protocols that dictate which tests much be performed and what procedures must be ...