Tn16958 is a transposon, a mobile genetic element, primarily found in certain strains of the bacterium Mycobacterium tuberculosis. It carries genes that confer resistance to multiple antibiotics, including aminoglycosides and macrolides, which can complicate treatment options for tuberculosis. The presence of Tn16958 in bacterial genomes is of significant concern in public health due to its role in the spread of drug-resistant tuberculosis.