Assessment of potency of inactivated Newcastle disease oil-adjuvanted vaccines using hemagglutination test and blocking ELISA.

Aim: The present study was aimed to establish a protocol for the evaluation of the potency of commercial inactivated Newcastle disease virus (NDV) oil-adjuvanted vaccines using hemagglutination test (HA) and blocking ELISA (B-ELISA) based on polyclonal antibodies.

Materials And Methods: Aqueous phases from a total of 47 batches of inactivated NDV vaccines manufactured by 20 different companies were extracted with isopropyl myristate. The viral antigen in each sample was detected and quantified by a standard HA test and a B-ELISA assay.

Closure of large oroantral fistulas using septal cartilage.

The aim of this work is to describe a relatively new technique for closure of large oroantral fistulas. Fistulas were treated surgically using autograft septal cartilage and a buccal pyramidal flap. There were 11 patients, 8 of whom had chronic oroantral fistulas.