Comparison of Six Methods of Detecting Salmonella typhimurium Infection of Chickens

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Abstract
Six methods were used in testing for prior exposure of chickens to S. typhimurium (ST). The most sensitive and reliable was the microantiglobulin (MAG) test; less reliable were the tube agglutination, microagglutination, rapid whole blood and rapid serum plate tests. The agglutinins demonstrated by the MAG test method were probably the direct result of exposure to ST and the MAG test detected the maximum number of birds previously exposed to ST. The cloacal swab culture method was inadequate.