Enterococcus
Sensitive strains of these bacteria can be treated with ampicillin, penicillin and vancomycin.<ref name=Baron>{{cite book | author = Pelletier LL Jr. | title = Microbiology of the circulatory system. in: Baron S et al. (eds) Baron's Medical Microbiology. | edition = 4th | publisher = Univ of Texas Medical Branch | year = 1996 | url = https://www.ncbi.nlm.nih.gov/books/bv.fcgi?rid=mmed.section.5077 | isbn = 0-9631172-1-1 }}</ref> Urinary tract infections can be treated by antibiotics, but many virulent strains of Enterococcus'' are resistant. From a medical standpoint, an important feature of this genus is the high level of intrinsic antibiotic resistance. This rules out some important antibiotics.