Development and Evaluation of a Serological Assay for the Diagnosis of Tuberculosis in Alpacas and Llamas

Frontiers in Veterinary Science
José Antonio Infantes-LorenzoFrancisco J Salguero

Abstract

South American camelids are susceptible to tuberculosis, caused mainly by Mycobacterium bovis and M. microti. Despite the tuberculin skin test being the official test for tuberculosis, it has a very low sensitivity in these species (14-20%). Serological tests present the advantages of being rapid, easy to perform and facilitate analysis of large numbers of samples in a short period of time. Novel antigen discovery and evaluation would provide enhanced detection of specific antibodies against members of M. tuberculosis complex. Here, we describe the development and evaluation of an ELISA-type immunoassays to use in the diagnosis of tuberculosis in llamas and alpacas based on P22, a multiprotein complex obtained by affinity chromatography from bovine Purified Protein Derivative (bPPD), that showed high sensitivity and specificity in mice, cattle and goats. This work was performed in two stages. First, a preliminary panel of samples collected from tuberculosis-free (n = 396) and M. bovis-infected herds (n = 56) was assayed, obtaining high specificity (100%) and sensitivity ranging from 63 to 96%. Subsequently, the use of the serological assay was tested using samples from two herds suffering from clinical M. bovis (n = 88) and M. ...Continue Reading

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Citations

May 15, 2020·Transboundary and Emerging Diseases·Sebastian GnatMariusz Dyląg
Jul 28, 2020·Frontiers in Veterinary Science·Claudia Arrieta-VillegasBernat Pérez de Val
Nov 12, 2020·BMC Veterinary Research·J A Infantes-LorenzoJ Bezos
Apr 2, 2021·BMC Veterinary Research·Paulo Alex Machado CarneiroJohn B Kaneene

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Methods Mentioned

BETA
ELISA
PCR
ELISAs

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