Limited diagnostic possibilities for bloodstream infections with broad‐range methods: A promising PCR/electrospray ionization‐mass spectrometry platform is no longer available

Abstract

Abstract Fast and accurate detection of causative agents of bloodstream infections remains a challenge of today's microbiology. We compared the performance of cutting‐edge technology based on polymerase chain reaction coupled with electrospray ionization‐mass spectrometry (PCR/ESI‐MS) with that of conventional broad‐range 16S rRNA PCR and blood culture to address the current diagnostic possibilities for bloodstream infections. Of 160 blood samples tested, PCR/ESI‐MS revealed clinically meaningful microbiological agents in 47 samples that were missed by conventional diagnostic approaches (29.4% of all analyzed samples). Notably, PCR/ESI‐MS shortened the time to positivity of the blood culture‐positive samples by an average of 34 hr. PCR/ESI‐MS technology substantially improved current diagnostic tools and represented an opportunity to make bloodstream infections diagnostics sensitive, accurate, and timely with a broad spectrum of microorganisms covered.

Keywords

• 16S PCR
• bloodstream infections
• broad‐range PCR
• molecular diagnostics
• PCR/ESI‐MS