Immune Response of Bos indicus Cattle against the Anti-Tick Antigen Bm91 Derived from Local Rhipicephalus (Boophilus) microplus Ticks and Its Effect on Tick Reproduction under Natural Infestation

Table 1

Number, weight, oviposition, and hatching of naturally infested R. (B.) microplus ticks collected from Bos indicus cattle immunized with the antigen Bm91 and injected with saline (control) and adjuvant, respectively (𝑁=6).

Parameter	Control	Adjuvant (% reduction)*	Bm91 (% reduction)
Tick number (mean ± SD)**	90 ± 64^NS	62 ± 40	81 ± 37
Tick weight in mg (mean ± SD)	84.0 ± 32.3^NS	80.4 ± 30.5 (4)	84.0 ± 30.2 (0)
Ticks ovipositing (%)	95.3^a	91.7^b (5)	94.3^ab (1)
REI (%)***	38.8 ± 9.7^a	38.5 ± 9.6^a (1)	36.6 ± 9.2^b (6)
Egg viability (%)	84.4^a	84.7^a (−1)	77.8^b (8)

*The percent reduction was calculated with respect to the control group.
**Values within the same row differ significantly (P < 0.05; 𝜒²-test).
***Reproductive efficiency index.
^NS𝑃>0.05.
^{a, b}Values within a line with different letters differ significantly (𝑃<0.05).