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An experiment was carried out to test the safety and potency of the Lapinized Hog Cholera and the Crystal Violet Hog Cholera Vaccines recently used in Paraguay. The results were summarized as follow :
Safety tests for both Lapinized Hog Cholera Vaccine and Crystal Violet Hog Cholera Vaccines were satisfactory. Two pigs for each kind of vaccine were inoculated with 10 doses/pig of respective vaccine. No any clinical sign (including fever reactio11) was observed during the experimental period. Lapinized Hog Cholera Vaccine inoculated pigs were challenged with 105 MLD virulent blood of ALD strain at 10 days post-vaccination, while Crystal Violet Hog Cholera Vaccine inoculated pigs were challenged with the same dose and same strain of virulent Hog Cholera virus at 21 days post-vaccination. All pigs except p[gs vaccinated with Crystai Violet Vaccine group A (See table l) survived to the cl!allenge.
Pigs vaccinated with one dose of Lapinized Hog Cholera Vaccine could stand the virulent Hog Cholera virus (l0'MLD, ALD strain) challenge at as early as 3 days post-vaccination, while those vaccinated with one dose of Crystal Violet Hog Cholera Vaccine group B at 2 weeks post-vaccination, and those vaccinated with one dose of Crystal Violet Hog Cholera vaccine group A not until 4 weeks post-vaccination (See table 2. )
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