Understanding Mycobacterium avium's Pathways in Infected Cattle
Author Information
Author(s): Janagama Harish K, Lamont Elise A, George Sajan, Bannantine John P, Xu Wayne W, Tu Zheng J, Wells Scott J, Schefers Jeremy, Sreevatsan Srinand
Primary Institution: University of Minnesota
Hypothesis
What are the transcriptional profiles of Mycobacterium avium subsp. paratuberculosis during natural infection in cattle?
Conclusion
The study reveals unique and common pathways of Mycobacterium avium associated with persistence and virulence in infected cattle tissues and macrophages.
Supporting Evidence
- 21% of the MAP genome was found in tissues, 8% in macrophages, and 3% in both.
- Upregulation of genes related to latency and cell envelope biogenesis was observed in intestinal tissues.
- Infected macrophages showed upregulation of genes involved in intracellular trafficking and secretion.
Takeaway
This study looks at how a germ called Mycobacterium avium behaves in sick cows, showing how it survives and causes disease.
Methodology
The study used postmortem examinations, histopathology, and microarray analysis to assess gene expression in infected tissues and macrophages.
Potential Biases
There may be bias due to the reliance on specific animal models that may not fully represent natural infection.
Limitations
The study is limited by the small sample size and the potential differences between in vitro and natural infection models.
Participant Demographics
Two subclinically infected dairy cattle were used in the study.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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