TABLE 3.

Response kinetics of serum antibody to mycobacterial LAM-enriched antigen

Infection statusS/P ratio (mean ± SE) of serum responsesa
PreinoculationDay 50 postinoculationDay 124 postinoculation
Noninfected−0.06 ± 0.03 A0.00 ± 0.05 A0.04 ± 0.14 A
M. kansasii infected0.05 ± 0.06 A0.55 ± 0.26 B0.76 ± 0.38 B
M. bovis infected−0.10 ± 0.11 A0.01 ± 0.03 A1.64 ± 0.19 C
  • a Shown are S/P ratio means (±standard errors) of serum ELISA responses from noninfected (n = 10), M. kansasii-infected (n = 4), and M. bovis-infected (n = 9) cattle. The S/P ratios of test samples were calculated from absorbency values using the following formulai sample − negative control/positive control − negative control. The letters A through C indicate responses that differ (P < 0.05) for a specific time after inoculation (i.e., vertical comparisons). The same letter indicates that the antibody responses did not differ.