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Lavabre T, Polizopoulou ZS, Isèbe D, Cioni O, Rebuffel V, Blandin P, Bourgès-Abella N, Trumel C. Detection of circulating microfilariae in canine EDTA blood using lens-free technology: preliminary results. J Vet Diagn Invest 2021; 33:572-576. [PMID: 33733938 DOI: 10.1177/10406387211001092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Dirofilaria immitis causes life-threatening heart disease in dogs, thus screening of dog populations is important. Lens-free technology (LFT) is a low-cost imaging technique based on light diffraction that allows computerized recognition of small objects in holographic images. We evaluated an algorithm capable of recognizing microfilariae in canine whole blood using the LFT. We examined 3 groups of 10 EDTA blood specimens, from dogs with microfilaremia (group A), healthy dogs (B), and dogs with hematologic modifications other than microfilaremia (C). The LFT analyzer photographed repeated series of 5 images of all samples. The algorithm declared a sample positive if a microfilaria was detected on ≥1, ≥2, or ≥3 of the 5 images of a series. Microfilariae were detected visually in the images in 9 of 10 cases in group A; no microfilariae were seen in the images from groups B and C. Of the 30 cases, there were 14, 4, and only 3 false-positives with the 1 of 5, 2 of 5, and 3 of 5 image cutoffs, respectively. There were no false-negatives, regardless of cutoff. LFT seems useful for detecting microfilaria and could have application in clinical pathology.
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Affiliation(s)
- Typhaine Lavabre
- Département des Sciences Cliniques des animaux de compagnie et de sport, École nationale vétérinaire de Toulouse, Université de Toulouse, INSERM, ENVT, UPS, Toulouse, France.,CREFRE, École nationale vétérinaire de Toulouse, Université de Toulouse, INSERM, ENVT, UPS, Toulouse, France
| | - Zoe S Polizopoulou
- Diagnostic Laboratory, School of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | | | - Olivier Cioni
- Université de Grenoble Alpes, CEA, LETI, Grenoble, France
| | | | - Pierre Blandin
- Université de Grenoble Alpes, CEA, LETI, Grenoble, France
| | - Nathalie Bourgès-Abella
- CREFRE, École nationale vétérinaire de Toulouse, Université de Toulouse, INSERM, ENVT, UPS, Toulouse, France
| | - Catherine Trumel
- Département des Sciences Cliniques des animaux de compagnie et de sport, École nationale vétérinaire de Toulouse, Université de Toulouse, INSERM, ENVT, UPS, Toulouse, France.,CREFRE, École nationale vétérinaire de Toulouse, Université de Toulouse, INSERM, ENVT, UPS, Toulouse, France
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Barrera Tomas M, Tomas Chota GE, Sheen Cortavarría P, Fuentes Bonilla P, Inocente Camones MA, Santiago Contreras JC. Synthesis of acyl-hydrazone from usnic acid and isoniazid and its anti-Mycobacterium tuberculosis activity. REVISTA COLOMBIANA DE QUÍMICA 2017. [DOI: 10.15446/rev.colomb.quim.v46n3.61980] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Se evaluó el ácido úsnico (1), aislado del liquen Evernia prunastri (Cajamarca-Perú), producto natural conocido por sus actividades biológicas, y, del mismo modo, se evaluó la síntesis de su derivado acil-hidrazona (2), obtenido a partir de una reacción de condensación entre el ácido úsnico y la isoniazida en solución etanólica a reflujo, con un rendimiento global de 95%. Ambos compuestos fueron evaluados y comparados con la isoniazida según su actividad anti-Mycobacterium tuberculosis basada en el ensayo de susceptibilidad mediante el método TEMA. Los resultados mostraron que el compuesto 1 presenta valores de MIC de 16,0 μg/mL frente a las cepas H37Rv, TB DM 97 y MDR DM 1098, mientras que el compuesto 2 presenta valores de MIC de 2,0; 64,0 y 64,0 μg/mL respectivamente.
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