Journal
PATHOGENS
Volume 11, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/pathogens11010061
Keywords
bovine; granuloma; lung; lymph node; mycobacteria
Categories
Funding
- USDA CRIS Agricultural Research Service [5030-32000-222]
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The bovine tuberculoid granuloma is a characteristic lesion of bovine tuberculosis, playing a key role in controlling the disease. However, it may also provide a niche for bacterial replication. Understanding the mechanisms behind granuloma formation and maintenance is crucial for assessing disease severity and vaccine efficacy.
The bovine tuberculoid granuloma is the hallmark lesion of bovine tuberculosis (bTB) due to Mycobacterium bovis infection. The pathogenesis of bTB, and thereby the process of bovine tuberculoid granuloma development, involves the recruitment, activation, and maintenance of cells under the influence of antigen, cytokines and chemokines in affected lungs and regional lymph nodes. The granuloma is key to successful control of bTB by preventing pathogen dissemination through containment by cellular and fibrotic layers. Paradoxically, however, it may also provide a niche for bacterial replication. The morphologic and cellular characteristics of granulomas have been used to gauge disease severity in bTB pathogenesis and vaccine efficacy studies. As such, it is critical to understand the complex mechanisms behind granuloma initiation, development, and maintenance.
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