Figure 1.

Overview of network studies on host–microbiome relationships. High-throughput Omics technologies produce a large amount of data, including metagenomic, metatranscriptomic, metaproteomic and metabolomic data, allowing the description of microbial communities at different layers. These molecular profiles of the microbial community can be viewed in the context of data describing the host and environment. Based on these different types of data, network analyses provide a viewpoint of host–environment–microbiome relationships.