Table 1 Rhipicephalus (B.) microplus transmission of the B. bovis S17.2 and S18.2 vaccine strains, and the S17.2 clonal line parasite population
Group | B. bovis strains | B. bovis Bv80 genotype classification according to alleles and base pairs | No. of cattle used for tick feeding | Parasitaemia during dropping of engorged females (%) | Percentage female ticks hemolymph positive for kinetes out of 20 examined | No. of cattle each infested with ± 20,000 larvae | B. bovis genotype(s) detected following transmission |
|---|---|---|---|---|---|---|---|
1 | S17.2 (S16)a | A558; A627; A645; B585 | 2 | 0.20–1.5 | 95 | 1 | A558; A627; A645; B585 |
|  |  |  |  | 0.08–1.0 | 100 | 1 | A558; A627; A645; B585 |
2 | S18.2 (S17.2)a | A645; B585 | 2 | 0.60–1.7 | 100 | 1 | A645; B585 |
|  |  |  |  | 0.20–1.2 | 50 | 1 | A645; B585 |
3 | Not infected | – | 1 | – | 0 | 1 | No transmission |
4 | 9626-S17.2-cl (originating from 3 parasites of S17.2)a | A558 | 2 | 0.10–1.0; 0.09–0.8 | 0; 0 | 1; 1 | No transmission |