Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.7/497
Título: Determinants of the Sympatric Host-Pathogen Relationship in Tuberculosis
Autor: David, Susana
Mateus, A. R. A.
Duarte, Elsa L.
Albuquerque, José
Portugal, Clara
Sancho, Luísa
Lavinha, João
Gonçalves, Guilherme
Palavras-chave: Tuberculosis
Mycobacterium tuberculosis
Host-pathogen interactions
HIV infections
Phylogeography
Age groups
HIV
Portugal
Data: 3-Nov-2015
Editora: PLOS
Citação: David S, Mateus ARA, Duarte EL, Albuquerque J, Portugal C, Sancho L, et al. (2015) Determinants of the Sympatric Host-Pathogen Relationship in Tuberculosis. PLoS ONE 10(11): e0140625. doi:10.1371/journal.pone.0140625
Resumo: Major contributions from pathogen genome analysis and host genetics have equated the possibility of Mycobacterium tuberculosis co-evolution with its human host leading to more stable sympatric host-pathogen relationships. However, the attribution to either sympatric or allopatric categories depends on the resolution or grain of genotypic characterization. We explored the influence on the sympatric host-pathogen relationship of clinical (HIV infection and multidrug-resistant tuberculosis [MDRTB]) and demographic (gender and age) factors in regards to the genotypic grain by using spacer oligonucleotide typing (spoligotyping) for classification of M. tuberculosis strains within the Euro-American lineage. We analyzed a total of 547 tuberculosis (TB) cases, from six year consecutive sampling in a setting with high TB-HIV coinfection (32.0%). Of these, 62.0% were caused by major circulating pathogen genotypes. The sympatric relationship was defined according to spoligotype in comparison to the international spoligotype database SpolDB4. While no significant association with Euro-American lineage was observed with any of the factors analyzed, increasing the resolution with spoligotyping evidenced a significant association of MDRTB with sympatric strains, regardless of the HIV status. Furthermore, distribution curves of the prevalence of sympatric and allopatric TB in relation to patients' age showed an accentuation of the relevance of the age of onset in the allopatric relationship, as reflected in the trimodal distribution. On the contrary, sympatric TB was characterized by the tendency towards a typical (standard) distribution curve. Our results suggest that within the Euro-American lineage a greater degree of genotyping fine-tuning is necessary in modeling the biological processes behind the host-pathogen interplay. Furthermore, prevalence distribution of sympatric TB to age was suggestive of host genetic determinisms driven by more common variants.
Peer review: yes
URI: http://hdl.handle.net/10400.7/497
DOI: 10.1371/journal.pone.0140625
Versão do Editor: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0140625
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