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1.  Genetic and Molecular Characterization of a Dental Pathogen Using Genome-Wide Approaches 
Actinobacillus actinomycetemcomitans causes periodontitis, a costly chronic infection that affects a large number of patients. The pathogenesis of this dental infection is a multifactorial process that results in a serious degenerative disease of the periodontium. Although significant progress has been achieved after the identification of this gram-negative bacterium as the etiological agent of this infection, much remains to be done to understand in detail the bacterial factors and host-pathogen interactions involved in the pathogenesis of this disease. Classical research approaches have resulted in the identification of important virulence factors and cellular processes, although they have provided a rather narrow picture of some of steps of this complex process. In contrast, a much wider picture could be obtained with the application of tools such as bioinformatics and genomics. These tools will provide global information regarding the differential expression of genes encoding factors and processes that lead to the pathogenesis of this disease. Furthermore, comparative genomics has the potential of helping to understand the emergence and evolution of this human pathogen. This genome-wide approach should provide a more complete picture of the pathogenesis process of this disease, and will facilitate the development of efficient diagnostic, preventive, and therapeutic measures for this disease.
PMCID: PMC1262653  PMID: 15126217
A. actinomycetemcomitans; dental pathogen; genomics; bioinformatics; iron metabolism

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