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Bacteria - Wikipedia
Many bacterial species exist simply as single cells, others associate in characteristic patterns: Neisseria form diploids (pairs), Streptococcus form chains, and Staphylococcus group together in "bunch of grapes" clusters. Bacteria can also group to form larger multicellular structures, such as the elongated filaments of Actinobacteria, the aggregates of Myxobacteria, and the complex hyphae of ...
Bacterial Infections: MedlinePlus
There are many types of bacterial infections. Learn about bacterial infections that can make you sick and how to treat them.