Affiliation:
1. Istituto Zooprofilattico Sperimentale delle Venezie
2. Istituto Zooprofilattico Sperimentale delle Venezie, Laboratorio di Medicina Forense Veterinaria
3. Istituto Zooprofilattico Sperimentale delle Venezie, Medicina di Laboratorio
4. University of Calgary
Abstract
Abstract
INTRODUCTION: The early diagnosis of Mycobacterium avium subsp. paratuberculosis (MAP) is one of the current challenges of farmers and veterinarians. OBJECTIVES: This work aimed to investigated the changes in metabolic levels associated with natural MAP infection in infected and infectious dairy cattle METHODS: The study included sera from 23 infectious/seropositive, 10 infected but non-infectious/seronegative, and 26 negative animals. The samples were selected from a collection of samples gathered during a prospective study. The samples were analyzed by quantitative nuclear magnetic resonance (NMR) spectroscopy and routine blood chemistry. The blood indices and the 1H NMR data were concatenated by low-level data fusion, resulting in a unique global fingerprint. Afterwards, the merged dataset was statistically analyzed by the least absolute shrinkage and selection operator (LASSO), which is a shrinkage and selection method for supervised learning. Finally, pathways analysis was performed to get more insights on the possible dysregulated metabolic pathways.RESULTS: The LASSO model achieved, in cross-validation, an overall accuracy of 91.5% with high values of sensitivity and specificity in classifying correctly the negative, infected, and infectious animals. The pathway analysis revealed MAP-infected cattle have increased tyrosine metabolism and enhanced phenylalanine, tyrosine and tryptophan biosynthesis. The enhanced synthesis and degradation of ketone bodies was observed both in infected and infectious cattle.CONCLUSION: In conclusion, fusing data from multiple sources has proved to be useful in exploring the altered metabolic pathways in MAP infection and potentially predicting negative animals within paratuberculosis-infected herds.
Publisher
Research Square Platform LLC
Reference32 articles.
1. Mycobacterium paratuberculosis. Factors that influence mycobactin dependence;Lambrecht RS;Diagnostic Microbiology And Infectious Disease,1992
2. Preclinical and clinical manifestations of paratuberculosis (including pathology);Whitlock RH;Vet Clin North Am Food Anim Pract,1996
3. The pathology and pathogenesis of paratuberculosis in ruminants and other species;Clarke CJ;Journal Of Comparative Pathology,1997
4. Johne's disease, inflammatory bowel disease, and Mycobacterium paratuberculosis;Chacon O;Annual Review Of Microbiology,2004
5. Rasmussen, P., Barkema, H. W., Mason, S., Beaulieu, E., & Hall, D. C.. Economic losses due to Johne's disease (paratuberculosis) in dairy cattle. (1525–3198(Electronic)).