alexa Md. A. Motaleb | East Carolina University
ISSN: 2155-9597

Journal of Bacteriology & Parasitology
Open Access

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Md. A. Motaleb

Md. A. Motaleb Md. A. Motaleb
Department of Microbiology and Immunology
East Carolina University
Tel. 252-744-3129
Fax 252-744-3535

Dr. Md. A. Motaleb is working as an Assistant Professor under the Department of Microbiology and Immunology at East Carolina University.

Research Interest

When a tick feeds, the spirochetes migrate from the tick midgut to its salivary glands and then into the mammalian host. Borrelia burgdorferi is highly invasive: After deposition in the skin by a tick bite, spirochetes traverse the intracellular matrix, penetrate the vascular endothelial cell lining, and are disseminated to large joints, ears, heart and other tissues. However, the mechanisms involved in this invasive process, and how the organisms migrate from the tick midgut to the salivary glands, are unknown.Borrelia burgdorferi has a wave-like morphology and unique means of motility. The organelles for motility, periplasmic flagella, are located in the periplasmic space within the outer membrane sheath and cell cylinder. These spirochetes are able to swim in highly viscous, gel-like environments such as joints, connective tissues and brain where most externally-flagellated bacteria move slowly or stop swimming. Periplasmic flagella are essential for both motility and morphology of Borrelia burgdorferi, as mutations in the gene encoding the major periplasmic flagellar protein results in cells that are rod-shaped and non motile.
Bacterial pathogens are highly adapted, with survival strategies that require multiplication and living in hosts. Chemotaxis two-component phosphorelay systems are fundamental to many adaptive responses and are often essential for virulence in host organisms. While motility and chemotaxis are critical for many pathogenic organisms to colonize and/or cause disease, the role of these processes in Borrelia burgdorferi-mediated pathogenesis has not been determined.One of their immediate goals is to determine the extent to which motility and chemotaxis in Borrelia burgdorferi is involved in transmission and disease progression. Their long term goal is to identify a molecule or a pathway (e.g., chemotaxis signal transduction pathway) in the organism for which a novel pharmacological agent can be developed to better treat or prevent the multi-systemic Lyme disease.


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