Abstract
Rapid and specific detection of Mycoplasma mycoides subsp. mycoides Small Colony (M. mycoides SC) is important for the effective control of contagious bovine pleuropneumonia. Although the United States has been free of this disease for over 100 years, it is necessary to develop modern diagnostic assays that are sensitive and specific for biological agents that would affect the US agricultural industry following accidental or intentional introduction into the US agricultural population. With this aim in mind, we have identified M. mycoides SC-specific genetic loci and developed TaqMan-based PCR assays for the detection of M. mycoides SC. The TaqMan assay allows for real-time detection of specific, amplified PCR products using portable equipment, enabling testing to be performed in the field. These assays are specific for M. mycoides SC, failing to amplify DNA from other organisms belonging to the M. mycoides cluster or two phylogenetically unrelated bovine mycoplasma species. Standard curves were drawn based on the linear relationships measured between the threshold fluorescence (C(T)) values and a measured quantity of genomic DNA. M. mycoides SC was successfully detected in bronchoalveolar lavage samples obtained from experimentally infected cattle. These TaqMan-based real-time PCR assays will allow for the rapid and specific detection of M. mycoides SC.
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