drug test

(noun)

Any chemical check for the presence of (usually illegal) drugs in a sample of one's blood, hair, or urine.

Examples of drug test in the following topics:

  • Drug Screening

    • Explaining why drug testing is necessary and following proven process guidelines will go a long way toward appeasing workers.
    • In Maryland, drug testing laws make it possible to screen for drugs using a hair specimen for pre-employment purposes only.
    • There are two kinds of employment drug testing: pre-employment drug screening and publish-employment drug testing.
    • Pre-employment testing is carried out prior to recruiting individuals to make certain that drug abusers do not enter into the business.
    • Nevertheless, the practice of drug testing in a company protects everyone.
  • Diagnostic Blood Tests

    • Blood tests are used to determine physiological and biochemical states such as disease, mineral content, drug effectiveness, and organ function.
    • They are also used in drug tests.
    • Although the term blood test is used, most routine tests (except for most hematology) are done on blood plasma instead of blood cells.
    • For these reasons, blood tests are the most commonly-performed medical tests.
    • While the regular glucose test is taken at a certain point in time, the glucose tolerance test involves repeated testing to determine the rate at which glucose is processed by the body.
  • Statistical Literacy

    • A research design to compare three drugs for the treatment of Alzheimer's disease is described here: http://www.nytimes.com/2012/10/11/health/alzheimers-prevention-studies-to-test-three-drugs.html?
    • For the first two years of the study, researchers will follow the subjects with scans and memory tests.
    • Assume the data were analyzed as a two-factor design with pre-post testing as one factor and the three drugs as the second factor.
    • What term in an ANOVA would reflect whether the pre-post change was different for the three drugs?
    • It would be the interaction of the two factors since the question is whether the effect of one factor (pre-post) differs as a function of the level of a second factor (drug).
  • Kirby-Bauer Disk Susceptibility Test

    • Kirby-Bauer testing measures sensitivity of bacteria to antibiotics by culturing bacteria on solid growth media surrounding sources of drug.
    • Kirby-Bauer antibiotic testing (also called KB testing or disk diffusion antibiotic sensitivity testing) uses antibiotic-containing wafers or disks to test whether particular bacteria are susceptible to specific antibiotics.
    • KB test results are usually reported as sensitive, intermediate, or resistant, based on the size of the zone of inhibition.
    • Clinicians can use KB test results to choose appropriate antibiotics to combat a particular infection in a patient.
    • Thus, clinical application of KB testing results can decrease the frequency with which antibiotic-resistant bacteria evolve.
  • Exercises

    • An experiment is conducted to test the claim that James Bond can taste the difference between a Martini that is shaken and one that is stirred.
    • An experiment testing whether echinacea decreases the length of colds.
    • A study comparing a drug with a placebo on the amount of pain relief.
    • (A one-tailed test was used. )
    • Would a sample value of M= 60 be significant in a two-tailed test at the .05 level?
  • Protease Inhibitors

    • The first approved protease inhibitor drug was released on the market in 1995, only 10 years after the discovery of HIV.
    • These drugs are an inseparable part of an HIV therapy.
    • The experimental protease inhibitor drugs Zmapp and Brincidofovir are currently being tested to treat the ebola virus disease.
    • One such drug is Nelfinavir.
    • The drug is ritonavir depicted here with a white molecule in the middle of the enzyme structure.
  • Hypothesis testing for nearly normal point estimates

    • H 0 : p control = p treatment (the drug doesn't work)
    • H A : p control > p treatment (the drug works)
    • H 0 : p control − p treatment = 0 (the drug doesn't work)
    • H A : p control − p treatment > 0 (the drug works)
    • In most hypothesis tests, a test statistic is a particular data summary that is especially useful for computing the p-value and evaluating the hypothesis test.
  • Biotechnology in Medicine

    • More accurate methods of determining appropriate drug dosages.
    • Improvements in the drug discovery and approval process.
    • The process of testing for suspected genetic defects before administering treatment is called genetic diagnosis by genetic testing.
    • Genetic testing involves the direct examination of the DNA molecule itself.
    • There are two major types of gene tests.
  • Minimal Inhibitory Concentration (MIC)

    • Minimum Inhibitory Concentration is the lowest drug concentration that prevents visible microorganism growth after overnight incubation.
    • MICs can be determined on plates of solid growth medium (called agar, shown in the "Kirby-Bauer Disk Susceptibility Test" atom) or broth dilution methods (in liquid growth media, shown in ) after a pure culture is isolated.
    • Because a lower MIC value indicates that less of the drug is required in order to inhibit growth of the organism, drugs with lower MIC scores are more effective antimicrobial agents.
    • This is important because populations of bacteria exposed to an insufficient concentration of a particular drug or to a broad-spectrum antibiotic (one designed to inhibit many strains of bacteria) can evolve resistance to these drugs.
    • (Here, the dilution series of the drug is set up from left to right: for example, well E1 might contain 100 units of drug; E2, 50 units; E3, 25 units; E4, 12.5 units; etc.).
  • Pharmacogenomics, Toxicogenomics, and Metagenomics

    • The effectiveness and safety of drugs can be determined through pharmacogenomics.
    • Pharmacogenomics, also called toxicogenomics, involves evaluating the effectiveness and safety of drugs on the basis of information from an individual's genomic sequence.
    • Genomic responses to drugs can be studied using experimental animals (such as laboratory rats or mice) or live cells in the laboratory before embarking on studies with humans.
    • Genome-wide studies can also help to find new genes involved in drug toxicity.
    • The gene signatures may not be completely accurate, but can be tested further before pathologic symptoms arise.
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