کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6116002 | 1215942 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of the preservative and temperature conditions on the stability of Leishmania infantum promastigotes antigens applied in a flow cytometry diagnostic method for canine visceral leishmaniasis
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
ایمنی شناسی و میکروب شناسی
میکروبیولوژی و بیوتکنولوژی کاربردی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The control of canine visceral leishmaniasis (CVL) is imperative, but euthanasia of seropositive dogs has been highly criticized. Commonly used, immunodiagnostic tests, including Dual-Path Platform®, enzyme-linked immunosorbent assay, and immunofluorescent antibody test, have failed at detecting asymptomatic dogs in endemic areas. In this context, new serological methods are needed. Flow cytometry serology has demonstrated potential as a test with excellent performance for CVL. In this study, we proposed to establish the best conditions for preserving Leishmania infantum promastigote antigens employed in this serology test. During 12 months of follow-up, promastigotes were maintained in different preservatives (phosphate-buffered saline with 3% fetal bovine serum, phenol 0.35%, thimerosal 0.01%, and formaldehyde 0.5%) and stored at 3 distinct temperatures (25 °C, 4 °C, and â20 °C). During the study period, the morphological characteristics of the promastigotes were assessed by flow cytometry according to the forward and side scatter parameters and also under optical microscopic analysis. Reactivity performance was evaluated as the percentage of positive fluorescent parasites in the sera of naturally infected and noninfected dogs. Microbiological analysis was performed at 2 time points, the first and sixth months, to rule out contamination of stored promastigotes. Taken together, our results indicated that the best conditions to preserve fixed L. infantum antigens were storage in formaldehyde at 4 °C. Promastigotes presented the best morphological profile, with appropriate antigenic stability even at 4 °C, in an inexpensive preservative for a long period of conservation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Diagnostic Microbiology and Infectious Disease - Volume 76, Issue 4, August 2013, Pages 470-476
Journal: Diagnostic Microbiology and Infectious Disease - Volume 76, Issue 4, August 2013, Pages 470-476
نویسندگان
Henrique Gama Ker, Rodrigo Dian de Oliveira Aguiar-Soares, Bruno Mendes Roatt, Nádia das Dores Moreira, Wendel Coura-Vital, Cláudia Martins Carneiro, Andréa Teixeira-Carvalho, Olindo Assis Martins-Filho, Rodolfo Cordeiro Giunchetti,