Background: Salmonella enterica subsp. enterica serovar Java (antigenic formula: 1,4,5,12:b:-) is also known as Paratyphi B variant L(+) tartrate(+). Salmonella Paratyphi B and Java are biovars of common serotype 1,4,[5],12:b:1,2 causing human paratyphoid fever and gastroenteritis, respectively. Different from ‘classical’ S. Paratyphi B, S. Java has an animal reservoir and leads to substantive outbreaks as a result of the contamination of food products.
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