AN RNA-BASED CLINICAL DIAGNOSTIC ASSAY USED TO IDENTIFY ACTIVE MICROBIAL INFECTIONS
Studies reveal the clinical efficacy of the CSI-Dx assay.

APPLIED RESEARCH

Studies reveal the efficacy of the CSI-Dx technology in a variety of clinical applications.

Culture-based methods have been regarded as the gold standard of diagnosis for infectious diseases (Laupland and Valiquette, 2013) and used as an essential tool in determining treatment regimens. However, these methods can take up to 96 hours to identify a pathogen and determine its susceptibility to antibiotics (Afshari et al., 2012). Some organisms, such as the causal agent of Lyme disease, B. burgdorferi, require special media and may take much longer to grow to detectable levels, if they grow at all (Schutzer et al., 2019). Factors that decrease the efficacy of culture-based methods include previous antibiotic treatment, growth media requirements that can be difficult or impossible to replicate, poor sample quality or preprocessing, low microbial load, and minor infection severity (Fenollar et al., 2006; Mancini et al., 2010; Afshari et al., 2012; Blauwkamp et al., 2019). Such methods fail to identify a pathogen as often as 50% of the time (Srinivasan et al., 2015). Situations where culture- based methods fail to identify pathogenic organisms in cases involving infection (culture- negative infections), have been shown to increase the risk of further complications due to uncertainties involving identification of pathogen(s) and associated resistances, which can delay the proper treatment required.

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Based on the current evidence, there is no diff erence in infection rates following IM fi xation of long bone fractures using a reamed or non-reamed technique. Using an IM fi xation technique has become the accepted standard in treating long bone fractures. Tibial fractures are the most common type of long bone fracture encountered and therefore are the most studied in the current literature.

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Septic arthritis is an orthopaedic emergency and needs prompt surgical treatment. Based on current evidence, there are no clear indications for the timing of surgical intervention in cases of osteomyelitis. The current literature does suggest monitoring disease progression, treatment effi cacy and resolution by trending C-reactive protein (CRP) levels.

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