Reported bioorthogonal chemistries with promise for use in covalent targeting of bacterial glycans. The highlighted chemistries entail small chemical reporters that are distinctive in biological systems, bioinert, and undergo exquisitely selective covalent elaboration with the indicat ed reactive partners. The second order rate constants were reported in the following references: (a)75, (b)76, (c)83, (d)86, (e)73, (f)98, (g)86, (h)110, (i)113,116, (j)114, (k)115, (l)118, (m)119.