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- W4385233014 abstract "Abstract Comparing the abundance of microbial communities between different groups or obtained under different experimental conditions using count sequence data is a challenging task due to various issues such as inflated zero counts, overdispersion, and non-normality. Several methods and procedures based on counts, their transformation and compositionality have been proposed in the literature to detect differentially abundant species in datasets containing hundreds to thousands of microbial species. Despite efforts to address the the large numbers of zeros present in microbiome datasets, even after careful data preprocessing, the performance of existing methods is impaired by the presence of inflated zero counts and group-wise structured zeros (i.e., all zero counts in a group). We propose and validate using extensive simulations an approach combining two differential abundance testing methods, namely DESeq2-ZINBWaVE and DESeq2, to address the issues of zero-inflation and group-wise structured zeros, respectively. This combined approach was subsequently successfully applied to two plant microbiome datasets that revealed a number of taxa as interesting candidates for further experimental validation." @default.
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- W4385233014 date "2023-07-25" @default.
- W4385233014 modified "2023-09-25" @default.
- W4385233014 title "A Strategy for Differential Abundance Analysis of Sparse Microbiome Data with Group-wise Structured Zeros" @default.
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- W4385233014 doi "https://doi.org/10.1101/2023.07.24.549296" @default.
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