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  Indian J Med Microbiol
 

Figure 3: LAT using field swine serum samples: (a) Negative field sample—The mixture remains opaque and no agglutination was observed; (b) Strong positive field sample—The particles agglutinated and migrated to the periphery leaving a clear solution; and (c) Positive field sample—Most of the particles have agglutinated but fluid is slightly opaque.

Figure 3: LAT using field swine serum samples: (a) Negative field sample—The mixture remains opaque and no agglutination was observed; (b) Strong positive field sample—The particles agglutinated and migrated to the periphery leaving a clear solution; and (c) Positive field sample—Most of the particles have agglutinated but fluid is slightly opaque.