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Deprecated: Implicit conversion from float 249.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Rev+Med+Suisse 2020 ; 16 (689): 699-701 Nephropedia Template TP
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Performance du frottis nasopharynge-PCR pour le diagnostic du Covid-19 - Recommandations pratiques sur la base des premieres donnees scientifiques #MMPMID32270938
Rev Med Suisse 2020[Apr]; 16 (689): 699-701 PMID32270938show ga
The Covid-19 pandemic imposes new diagnostic strategies in order to optimize the medical care of our patients. The current biblio-graphy, although of low quality, shows a sensitivity of 56 to 83 % for the Covid-19 PCR. Even though one negative test can exclude a Covid-19 in the majority of cases, the NPV (Negative Predictive Value) decreases with increasing prevalence (pre-test probability). This finding suggests the need for strict auto-isolation of patients until the resolution of their symptoms. For patients that present with typical symptoms, who have a presumed Covid-19 prevalence of -40-50 %, a negative test should be interpreted with caution and a repeat test may be needed.