Table 1.

Results of the oral vaccination on cattle tick infestations.

Group (cattle no.)	No. female ticks	Female tick weight (mg)	Oviposition egg mass/tick (mg)	Fertility (No. larvae/tick)
SUB+IV (1)	36	233 ± 92	98 ± 61	592 ± 490
SUB+IV (3)	59	210 ± 68	116 ± 37	961 ± 620
SUB+IV (5)	73	234 ± 47	104 ± 38	819 ± 610
Average ± S.D.	56 ± 19*	226 ± 14	106 ± 9	791 ± 186**
Control IV (2)	113	206 ± 53	114 ± 40	1, 118 ± 571
Control IV (4)	116	207 ± 54	114 ± 39	1, 157 ± 558
Average ± S.D.	115 ± 2	207 ± 1	114 ± 0	1, 138 ± 28

Results are shown for each vaccinated and infested cattle (N = 3 for SUB+IV and N = 2 for IV). Data was analyzed statistically to compare results between ticks fed on SUB+IV and IV vaccinated cattle (

^*p = 0.02

^**p = 0.04; Student's t-test with unequal variance). Vaccine efficacy (E = 65%) was calculated as E = 100 x [1-(DT x DF)], where DT = No. female ticks in SUB+IV vaccinated calves/female ticks in IV vaccinated calves and DF = No. larvae/tick in SUB+IV vaccinated calves/No. larvae/tick in IV vaccinated calves.