B. henselae is generally resistant to penicillin, amoxicillin, and nafcillin. Epidemiology Homeless intravenous drug users are at high risk for Bartonella infections, particularly B. elizabethae. B. elizabethae seropositivity rates in this population range from 12.5% in Los Angeles, to 33% in Baltimore, Maryland, 46% in New York City, and 39% in Sweden. Phylogeny The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN). The phylogeny is based on whole-genome analysis. References External links August 30. 2014. People's Pharmacy Radio Podcast: Bartonella, website May 18, 2012 Bartonella spp. bacteremia and rheumatic symptoms in patients from Lyme disease-endemic region Medical publication, North Carolina State University, Raleigh, North Carolina, USA. Bartonella genomes and related information at PATRIC, a Bioinformatics Resource Center funded by NIAID New Bartonella Species That Infects Humans Discovered Bartonellaceae Bacteria genera Tropical diseases