TABLE 2.

Immunological reactivity of the 49-kDa protein of Salmonella serovar Typhimurium (wild)

Well no.Serum dilutionPrecipitin line intensitya
1None (pure serum)Intense blue area
21:10++
31:100+
41:1,000
51:10,000
61:50,000
7NAb (PBS only)
8NA (PBS at 1:10)
  • a ++, significant antigen-antibody reaction; +, visible reaction; −, no visible reaction.

  • b NA, not applicable.