Sekisui OSOM BVBLUE Test 183. Detects elevated vaginal fluid sialidase activity, an enzyme produced by bacterial pathogens associated with bacterial vaginosis including Gardnerella, Bacteroides, Prevotella and Mobiluncus. 92.8% sensitive, 98% specific versus Gram Stain. 1 minute hands-on-time; 10 minute read time. Instant color change provides clear easy-to-read results.. CPT Code: 87905QW. 25/BX. Priced per box.