Table 1.

Infection of R. haemaphysaloides by exposure to mice infected with B. microti

Tick stage applied	No. of engorged ticks analyzed	No. of positive engorged ticks (%)	No. of ticks analyzed 4 week post molting	No. of positive molted ticks (%)*
Larva	20	19 (95.5)	80	35 (43.8)
Nymph	12	12 (100)	30	29 (96.7)

*P < 0.01