Medicine

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Author: search.filters.author.Abeyewickreme, W.Subject: search.filters.subject.Dirofilariasis-diagnosis

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    Dirofilaria repens: Cloning and Characterization of a Repeated DNA Sequence for the Diagnosis of Dirofilariasis in Dogs, Canis familiaris
    (Academic Press, 1994) Chandrasekharan, N.V.; Karunanayake, E.H.; Franzen, L.; Abeyewickreme, W.; Pettersson, U.
    A highly repetitive DNA element from the genome of the filarial nematode Dirofilaria repens has been cloned and sequenced. The 176-base pair repeating units are arranged in direct tandem and are clustered in the parasite genome. All repeats appear to belong to a single family although some elements have diverged significantly. The repeats are present in about 15,000 copies and constitute approximately 3.0% of the parasite genome. The cloned repetitive sequence hybridized only to D. repens DNA and was sensitive enough to detect 250 to 500 pg of D. repens DNA, a single microfilariae in infected blood samples, and a single third stage larvae in mosquitoes. The high specificity and sensitivity of the cloned fragment makes it ideal as a diagnostic probe for detecting D. repens in both the host and the vector.
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