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A new interesting article has been published in Talanta. 2019 Dec 1; 205:120130. doi: 10.1016/j.talanta.2019.120130. Epub 2019 Jul 9. and titled:

Antibiotic-affinity chromatographic test strip for quantitative analysis and antibiotic resistance testing of Staphylococcus aureus.

Authors of this article are:

Shi Y, Yang H, He Y, Fu Z.

A summary of the article is shown below:

Bacterial analysis and antibiotic resistance testing (ART) are of great significance in clinical diagnosis and therapy of bacterial infectious diseases. In this work, a portable antibiotic-affinity chromatographic test strip has been developed for rapid analysis of Staphylococcus aureus (S. aureus) and further applied for ART of this pathogen. Porcine IgG was immobilized on a nitrocellulose membrane for capturing S. aureus based on the selective binding capability of the Fc fragment of IgG toward protein A on the surface of the target bacteria. Fluorescent microspheres modified with teicoplanin (TEI) were applied as signal substances to trace S. aureus utilizing the hydrogen bond conjugation between this antibiotic and Gram-positive bacteria. S. aureus can be analyzed within the concentration range from 1.4 × 103 CFU mL-1 to 1.4 × 107 CFU mL-1. The recovery values for spiked samples were 93.3-110.0%. The obtained results of ART for penicillin, daptomycin, gentamicin, cefoxitin and clindamycin against S. aureus showed agreement with those of traditional broth dilution method. The procedures for bacterial analysis and ART can be accomplished within 20 and 110 min, respectively. The antibiotic-affinity chromatographic test strip showed great promise in point-of-care testing because of its ideal portability and rapidity.Copyright © 2019 Elsevier B.V. All rights reserved.

Check out the article’s website on Pubmed for more information:

[link-preview url=https://www.ncbi.nlm.nih.gov/pubmed/31450481 forceshot=true]

This article is a good source of information and a good way to become familiar with topics such as: Antibiotic resistance testing; Chromatographic test strip; Point-of-care testing; Staphylococcus aureus; Teicoplanin.

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