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Estimar la prevalencia de uso de anticoncepción hormonal de solo gestágenos (AHSG) entre las mujeres demandantes de anticoncepción reversible en atención primaria (AP).

The aim of the present study was to isolate and evaluate the diversity of rhizobial and endophytic bacterial strains from undisturbed native rainforests within an iron ore mining site of the Serra Norte de Carajás in the Eastern Brazilian Amazon region to assess their biotechnological utility in reclamation of areas. Experiments were conducted to capture strains from samples of the soil of these forests at the sites Arenito II, Noroeste II, and Sul IV using Macroptilium atropurpureumand Mimosa acutistipulavar. ferreaas trap host plants. Only M. atropurpureumnodulated, and the different bacterial strains were isolated from its nodules. There was no difference in the number of nodules among the areas, but the Arenito II bacterial community was the most efficient, indicated by the aboveground biomass production and suitable shoot mass/root mass ratio. Fifty-two (52) bacterial isolates were obtained, distributed in five groups, including nodulating and endophytic bacteria: 32 from Arenito II, 12 from Noroeste II, and 8 from Sul IV. The nodulating Bradyrhizobiumgenus was common to the three areas, whereas Paraburkholderiawas found only in Arenito II. The nodD1gene was amplified in all the strains of both nodulating genera. Strains of the nodulating genus Methylobacteriumwere also isolated from the three areas; however, they did not nodulate the host of origin, and their nodD1gene was not amplified. Endophytic strains were also isolated from the genera Paenibacillus, Pantoea, and Leifsoniain Arenito II, Leifsoniain Noroeste I, and Paenibacillusin Sul IV. The greater nodulation and rhizobial and endophytic bacterial diversity observed in Arenito II were probably due to the more suitable edaphic properties of the area. The isolated strains were incorporated in the collection of the Department of Soil Science of UFLA and will be investigated in relation to their symbiotic characteristics with native host plants, as well as their ability to perform other biological processes.

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