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Multilaboratory Evaluation of a Novel Lateral Flow Immunochromatographic Assay for Confirming Isolation of Mycobacterium bovis from Veterinary Diagnostic Specimens.

Abstract：

:A novel lateral flow immunochromatographic device (LFD) was evaluated in several veterinary diagnostic laboratories. It was confirmed to be specific for Mycobacterium bovis and M.caprae cells. The performance of the novel LFD was assessed relative to the confirmatory tests routinely applied after culture (spoligotyping or quantitative PCR [qPCR]) in each laboratory; liquid (MGIT or BacT/Alert) and/or solid (Stonebrink, Coletsos, or Lowenstein-Jensen) cultures were tested. In comparison to spoligotyping of acid-fast-positive MGIT cultures, percent agreement between positive LFD and spoligotyping results was excellent in two United Kingdom laboratories (97.7 to 100%) but lower in the Spanish context (76%), where spoligotyping was applied to MGIT cultures previously confirmed to be positive for M. tuberculosis complex (MTBC) by qPCR. Certain spoligotypes of M. bovis and M. caprae were not detected by the LFD in Spanish MGIT cultures. Compared to qPCR confirmation, the agreement between positive LFD and qPCR results was 42.3% and 50% for BacT/Alert and MGIT liquid cultures, respectively, and for solid cultures, it ranged from 11.1 to 89.2%, depending on the solid medium employed (Coletsos, 11.1%; Lowenstein-Jensen, 55.6%; Stonebrinks, 89.2%). Correlation between the novel LFD and BD MGIT TBc Identification test results was excellent when 190 MGIT cultures were tested (r = 0.9791; P < 0.0001), with the added benefit that M. bovis was differentiated from another MTBC species in one MGIT culture by the novel LFD. This multilaboratory evaluation demonstrated the novel LFD's potential utility as a rapid test to confirm isolation of M. bovis and M. caprae from veterinary specimens following culture.

journal_name

J Clin Microbiol

journal_title

Journal of clinical microbiology

authors

Stewart LD,McCallan L,McNair J,McGoldrick A,Morris R,Moyen JL,De Juan Ferré L,Romero B,Alonso E,Parsons SDC,Van Helden P,Araújo FR,Grant IR

doi

10.1128/JCM.00728-17

subject

Has Abstract

pub_date

2017-12-01 00:00:00

pages

3411-3425

issue

eissn

0095-1137

issn

1098-660X

pii

JCM.00728-17

journal_volume

pub_type

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Multilaboratory Evaluation of a Novel Lateral Flow Immunochromatographic Assay for Confirming Isolation of Mycobacterium bovis from Veterinary Diagnostic Specimens.