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- W2461227383 abstract "Being born too early or being born too small is the largest cause of neonatal mortality in the world. Compared to the rest of the world, Malawi has one of the largest burdens of preterm birth and neonatal stunting, with infection recognised as an important risk factor. Previous studies have used culture and molecular methods to identify bacteria that could be responsible for triggering labour and foetal growth restriction. The composition of the oral and vaginal microbiome has also been linked as the possible source of these bacteria. However, studies up to this point have been small and have not utilised the full potential of current sequencing technologies. In this thesis, I demonstrated using high-throughput sequencing of the 16S rRNA gene that certain organisms are associated with adverse birth outcomes. Contaminating bacterial taxa, PCR and sequencing error can be filtered post-sequencing to allow reliable reconstruction of microbial communities from low biomass samples such as the placenta. This revealed a specific community structure in the placenta and foetal membranes associated with severe chorioamnionitis. Analysis of communities in both matched vaginal and placental samples increased prevalence of Peptostreptococcus anaerobius, Sneathia sanguinegens and Prevotella amnii were associated with a smaller newborn size. These results provide further evidence of the important role the vaginal microbiome may play in seeding organisms found on placental tissues and therapeutic interventions could be designed to impact these communities with the goal of reducing the risk of preterm birth or intrauterine growth restriction." @default.
- W2461227383 created "2016-07-22" @default.
- W2461227383 creator A5022364233 @default.
- W2461227383 date "2016-03-28" @default.
- W2461227383 modified "2023-09-28" @default.
- W2461227383 title "Placental, oral and vaginal microbiomes and birth outcomes in rural Malawi" @default.
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