Abstract
A classical live attenuated sheep pox vaccine was prepared using the Ranipet strain of sheep pox virus (SPV) at the 50th passage in a secondary lamb testicular cell system. The TCID50 and RD50 were 109.63/ml and 109.51/ml, respectively. The SID50 of SPV challenge virus was 10/ml. The vaccine was found to have no adverse effects in laboratory animals, and was safe and effective in SPV seronegative lambs. In the field, 660 sheep were vaccinated with an immunizing dose containing 1×10 TCID50. Randomly selected vaccinated sheep mounted good cell-mediated immunity and humoral responses as measured by glucose utilization test and serum neutralization test, respectively, for the study period of 6 months.
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Bhanuprakash, V., Indrani, B., Hegde, R. et al. A Classical Live Attenuated Vaccine for Sheep Pox. Tropical Animal Health and Production 36, 307–320 (2004). https://doi.org/10.1023/B:TROP.0000026661.88631.50
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DOI: https://doi.org/10.1023/B:TROP.0000026661.88631.50