Leptospira interrogans sorovar Copenhageni e Icterohaemorrhagiae: relação evolutiva, diferenças genéticas e associação com desfecho clínico / Leptospira interrogans serovar Copenhageni and Icterohaemorrhagiae: evolutionary relationship, genetic differences and association with clinical outcome

A leptospirose é a zoonose mais disseminada mundialmente por infectar diversas espécies diferentes de animais mamíferos. Apresenta 22 espécies identificadas, sendo dez patogênicas, cinco intermediarias e sete saprofiticas, além de apresentar mais de 250 sorovares diferentes. Em Salvador, Leptospira interrogans sorovar Copenhageni é a causadora da epidemia urbana na cidade e apresenta ratos como seu hospedeiro reservatório. As formas clínicas da leptospirose podem variar de assintomática a formas graves. As manifestações clínicas mais graves envolve o desenvolvimento da síndrome Hemorrágica pulmonar severa, e óbito do paciente. Estudos para entender as diferenças genéticas entre as diferentes espécies e sorovares é de extrema importância para identificar fatores de virulência da bactéria, genes que possam está associado aos diferentes formas clinicas, e sua capacidade de se adaptar aos diferentes ambientes. Neste trabalho foi estudado o genoma de dois importantes serovares de L. interrogans, o sorovar Copenhageni e o serovar Icterohaemorrhagiae, e suas diferenças genéticas e associação com dados clínicos e epidemiológicos. Um total de 141 isolados...

There are 22 different species of Leptospira spp. in which 10 are pathogenic, 5 intermediate and 7 saprophytic species. In Salvador the Leptospira interrogans sorovar Copenhageni is the main serovar detected, responsible for the urban epidemics, and has rats as their main host. The clinical manifestations of leptospirosis can vary from asymptomatic form to severe disease like pulmonary hemorrhagic syndrome, and death. Studies to understand de genetic differences among the species and serovars are of great importance to identify virulence factors, genes that could be related to the different clinical manifestations and its capacity to adapt in different environments. Here, the genome of two epidemiologically important serovar of the L. interrogans, the serovar Copenhageni and serovar Icterohaemorrhagiae, and their genetic differences and the association of these differences with epidemiological and clinical data were studied. A total of 141 strains...

Coping with genetic diversity: the contribution of pathogen and human genomics to modern vaccinology

Vaccine development faces major difficulties partly because of genetic variation in both infectious organisms and humans. This causes antigenic variation in infectious agents and a high interindividual variability in the human response to the vaccine. The exponential growth of genome sequence information has induced a shift from conventional culture-based to genome-based vaccinology, and allows the tackling of challenges in vaccine development due to pathogen genetic variability. Additionally, recent advances in immunogenetics and genomics should help in the understanding of the influence of genetic factors on the interindividual and interpopulation variations in immune responses to vaccines, and could be useful for developing new vaccine strategies. Accumulating results provide evidence for the existence of a number of genes involved in protective immune responses that are induced either by natural infections or vaccines. Variation in immune responses could be viewed as the result of a perturbation of gene networks; this should help in understanding how a particular polymorphism or a combination thereof could affect protective immune responses. Here we will present: i) the first genome-based vaccines that served as proof of concept, and that provided new critical insights into vaccine development strategies; ii) an overview of genetic predisposition in infectious diseases and genetic control in responses to vaccines; iii) population genetic differences that are a rationale behind group-targeted vaccines; iv) an outlook for genetic control in infectious diseases, with special emphasis on the concept of molecular networks that will provide a structure to the huge amount of genomic data.

O desenvolvimento biológico em conexão com a guerra / The Biological development in connection with the war

O século XX foi cenário da construção de um sistema para a operacionalização da ciência estratégica das grandes potências, chamada Big Science. Este sistema é constituído por uma vasta rede institucional integrada, o "complexo militar-industrial-acadêmico", que desenvolve pesquisas estratégicas e direciona a ciência de ponta. O objetivo deste estudo foi investigar a lógica desta construção sob a ótica do poder, fazendo um contraponto entre os desenvolvimentos tecnológicos da Física e da Biologia. Os movimentos de poder identificam algumas características que, em tese, refletem o incentivo para indução do desenvolvimento científico da modernidade, potencializado na era atômica com a fabricação de armas de destruição em massa, as armas de alta tecnologia. Nesta perspectiva, buscamos a relevância do desenvolvimento biológico de interesse político-militar, tomando por base a fabricação de três gerações de armas ao longo do século XX, com crescente posicionamento na corrida armamentista. Esta análise envolve as décadas de 1940 até 1980, na busca de demonstrar uma convergência técnico-política nas trajetórias do desenvolvimento biológico e da guerra biológica, que culminou numa conexão científico-militar no início da era biotecnológica.

The XX Century was the scenario for the construction of a system devoted to operationalizing the strategic science of the great potentials named the Big Science. This system comprehends a vast institutional and integrated network, the "military-industrial-academic complex", which carries out strategic research and guides high quality science. The objective of this study was to investigate the logics of such construction under the perspective of power, highlighting a counterpoint between the technological development of Physics and Biology. The power movement points to some characteristics, that theoretically reflect the incentive to the induction of the scientific development of modern times, potentialized during the atomic age by the manufacturing of high technology weapons. In this perspective one can search the relevance of the biological development of political-military interest in the three-generation manufacturing of weapons throughout the XX Century, and the participation in the armaments race. This historiographic analysis encompasses the decades of 1940 through 1980, in an attempt to show the ethnical-political convergence in the paths taken by the biological development and the biological war which eventually led to a scientific and military connection at the beginning of the biotechnological era.