Multinational Salmonella Paratyphi B variant Java (Salmonella Java) outbreak, August - December 2007.

Salmonella Paratyphi B and Java are biovars of common serotype 1,4,[5], 12:b:1,2 which respectively cause human paratyphoid fever and gastroenteritis. The d-tartrate fermenting variant S. enterica subspecies enterica serovar Paratyphi B dT+ (formerly called and referred to in this report as S. Java) is thought to be less virulent to humans than the non d-tartrate fermenting variant, although cases of invasive infection have been reported.