Brucella abortus vaccine strain 19 Brucella strain-19 A live attenuated Brucella abortus vaccine that is licensed and used in many countries. Brucella S19 S19 has a 703 nucleotide deletion which interrupts both the coding regions of eryC (BAB2_0370) and eryD (BAB2_0369). The deletion affects the C terminal part of eryC and the N-terminal part of eryD proteins from B. abortus strains 2308 (BAB2_0369), 9–941 (BruAb2_0365) and B. suis (BRA0867). (http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2364660/) live attenuated Brucella abortus vaccine