Existing assays for rabies virus antibody prevalence studies either require high containment facilities or do not distinguish between neutralising and non-neutralising antibodies [59] [60] . Recently however, a neutralisation assay using retroviral pseudotypes was described [50] , not bound by the restrictions listed above and also allowing a choice of endpoint reporter proteins (bgalactosidase, green fluorescent protein or luciferase) [61] . A further benefit of this technique is its adaption to using small volumes of sera thus making them useful for surveillance.