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A new interesting article has been published in Appl Microbiol Biotechnol. 2019 Aug 6. doi: 10.1007/s00253-019-10068-x. and titled:

Multiplex flow cytometry serology to diagnosis of canine visceral leishmaniasis.

Authors of this article are:

Ker HG, Coura-Vital W, Valadares DG, Aguiar-Soares RDO, de Brito RCF, Veras PST, Fraga DBM, Martins-Filho OA, Teixeira-Carvalho A, Reis AB.

A summary of the article is shown below:

An accurate diagnosis of visceral leishmaniasis is an essential tool for control of the disease. While serologic methods are very useful, these conventional methodologies still present limitations in terms of sensitivity and specificity. The use of flow cytometry is a worldwide trend in the development of high-performance diagnostic methods. Herein, we describe a new flow cytometry serology test, characterized by the employment of the Cytometric Bead Array microspheres A4 and E4 coated with the recombinant antigens rLci1A and rLci2B respectively, to improve the serodiagnosis of canine visceral leishmaniasis. The tests were conducted in a wide variety of sera groups (n = 140), where the diagnostics development would be optimized accounting not just the ability to identify infected dogs with different clinical status, but also to exclude cross-reaction and differentiate vaccinated dogs from dogs infected. Serological testing of the antigenic system A4-rLci1A showed a sensitivity of 90.0% and specificity of 75%, while the E4-rLci2B testing demonstrated a sensitivity of 95.0% and specificity of 82.5%. The use of a multiplex assay of A4-rLci1A and E4-rLci2B, resulted in a diagnostic improvement, with a sensitivity of 95.0% and specificity of 91.2%. Our results show that this novel flow cytometry serology test is a viable tool for sensitive and specific serodiagnosis. Notably, the combination of distinct antigenic systems allows us to test for antibodies to multiple recombinant antigens from a single serum sample. This benefit emphasizes the importance of this methodology as an alternative in the serological diagnosis.

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

[link-preview url=https://www.ncbi.nlm.nih.gov/pubmed/31388731 forceshot=true]

This article is a good source of information and a good way to become familiar with topics such as: Canine visceral leishmaniasis;Flow cytometry;Leishmania infantum;Multiplexed diagnosis;Serological methods.

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