Oceanic islands share several environmental characteristics that have been shown to drive convergent evolutionary changes in island organisms. One change that is often assumed but has seldom been examined is the evolution of weaker immune systems in island species. The reduction in species richness on islands is expected to lead to a reduced parasite pressure and, given that immune function is ...

Three hybridizing species-the clade [(Drosophila yakuba, D. santomea), D. teissieri]-comprise the yakuba complex in the D. melanogaster subgroup. Their ranges overlap on Bioko and São Tomé, islands off west Africa. All three species are infected with Wolbachia-maternally inherited, endosymbiotic bacteria, best known for manipulating host reproduction to favor infected females. Previous analyses...

Plasmodium falciparum sensitivity to quinine in São Tomé was determined by in vivo and in vitro tests in 56 children with mild or cerebral malaria. Chloroquine sensitivity was assessed by in vitro tests in 105 parasitaemic asymptomatic children from the same community as the cases. The WHO standard methodology was used. No resistance to quinine was found by in vivo or in vitro tests in either g...

Todas as sociedades possuem uma cultura que dita regras de ser e estar em sociedade. A é das práticas mais importantes da afirmação identidade um povo. As culturas mudam à medida a sociedade se adapta aos novos modelos vida. Em muitos casos, o provoca mudanças contato entre povos fazendo com grupo assimila do outro. pesquisa visou compreender problemática violência contra mulheres idosas São To...

experience of double revolutionary upheavals in russia during the 20th century which produced a new socio-economic regularity on one hand and changed the political system from monarchial to democratic republic and then soviet state and finally presidential republic at the end of 20th century on the other hand are treated as democratic movements. in this regard, crumbling of ex-soviet regime and...