Brucella abortus vaccine strain RB51 is a natural stable attenuated rough mutant derived from the virulent strain 2308. The genetic mutations that are responsible for the roughness and the attenuation of strain RB51 have not been identified until now. Also, except for an assay based on pulsed-field gel electrophoresis, no other simple method to differentiate strain RB51 from its parent strain 2308 is available. In the present study, we demonstrate that the wboA gene encoding a glycosyltransferase, an enzyme essential for the synthesis of O antigen, is disrupted by an IS711 element in B. abortus vaccine strain RB51. Exploiting this feature, we developed a PCR assay that distinguishes strain RB51 from all other Brucella species and strains tested.
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| http://dx.doi.org/10.1128/CDLI.6.5.760-764.1999 | DOI Listing |
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Systematic review on the effectiveness of Brucella abortus S19 and RB51 vaccine strains in field studies.
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Article Synopsis
- Brucella abortus (B. abortus) is a germ that can live inside certain immune cells called macrophages and it can make these cells die in a specific way called ferroptosis.
- In a study, scientists found that the rough strain of B. abortus, named RB51, causes ferroptosis in macrophages by changing levels of important molecules like iron and antioxidants.
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