RESUMEN
About 11 faecal samples from various regions of Tamil Nadu and Andhra Pradesh containing mixed spectrum of Eimeria species detected by morphometry viz. 15.4 × 11.2, 28.5 × 20.3, 31.1 × 18.5, 13.2 × 12.4, 20.8 × 17.5 and 22 × 18 µm for E. acervulina, E. brunetti, E. maxima, E. mitis, E. necatrix, E. praecox and E. tenella respectively were taken for the study. The oocysts were concentrated and purified using faecal harvest protocol. The genomic DNA is extracted as per kit protocol. The amplicons of sizes 539 bp (E. tenella) and 460 bp (E. mitis) obtained could be visualised in a single lane for the multiplex PCR assay using sequence characterized amplified region primers.
RESUMEN
Peste des petits ruminants (PPR) is a highly contagious, economically important viral disease of sheep and goats with high morbidity and mortality rates. In order to control the disease effectively, highly sensitive diagnostic tests coupled with potent vaccines are important pre-requisites. At present, there are three live attenuated PPR vaccines available in India including Sungri 96, Arasur 87 and Coimbatore 97. Indian Veterinary Research Institute (IVRI) Mukteswar developed the PPR Sungri 96 (isolate of goat origin) vaccine; while Tamil Nadu Veterinary and Animal Sciences University (TANUVAS) developed the Arasur 87 (isolate of sheep origin) and Coimbatore 97 (isolate of goat origin). In this study, the potency of these vaccines including a fourth vaccine from Institute of Animal Health and Veterinary Biologicals, Bangalore (IAH&VB) were tested as per the office International des Epizooties (OIE) guidelines by challenge studies in sheep and goats and their efficacies were evaluated using PPR C-ELISA. Potency tests of these vaccines in sheep and goats revealed that three of the vaccines were potent; however, the IAH &VB vaccine was comparatively less potent. The three vaccines could presumably be used for mass vaccination of both sheep and goats while contemplating PPR control program.