Table 3: Mean duration in days of M. bovis persistence in the environment on corn, hay, water and soil samples in season “A”, “B”, and “C” in shaded and nonshaded conditions.

Shade mean (Std. Dev.)No shade mean (Std. Dev.)t statisticP-value

Fall/Winter “A”12.79 (12.27)9.58 (9.38)−1.68.10
Winter/Spring “B”18.40 (20.65)17.41 (20.48)−0.20.84
Spring/Summer “C”7.18 (12.52)2.38 (4.03)−1.48.15