Table 3 Development of East Coast fever symptoms in cattle vaccinated with the multivalent antigen cocktail after exposure to Theileria parva-infected ‘low-line’ ticks

Pyrexia^a,b

Number of animals where symptom observed (%)

15 (83 %)

9 (90 %)

< 0.999^d

Day of first onset

10.3 (1.2)

11.1 (1.8)

0.801^e

Duration

5.8 (0.9)

5. 6 (1.4)

0.803^e

Regional lymph node parasitosis^a

Number of animals where symptom observed (%)

13 (72 %)

9 (90 %)

0.375^d

Day of first onset

13.5 (0.6)

14.0 (1.1)

0.774^e

Duration

4.2 (0.7)

3.7 (0.9)

0.547^e

Contra-lateral lymph node parasitosis^a

Number of animals developing symptom (%)

8 (44 %)

6 (60 %)

0.695^d

Day of first onset

16.1 (0.5)

17.2 (0.6)

0.211^e

Duration

3 (0.8)

2.5 (1.7)

0.825^e

Piroplasm^a

Number of animals where symptom observed (%)

5 (28 %)

4 (40 %)

0.678^d

Day of first onset

17.6 (0.6)

17.0 (0.4)

0.722^e

Duration

3 (0.6)

3 (0.7)

< 0.999^e

Nested p104 PCR detection of parasites

17 (94 %)

9 (90 %)

< 0.999^d

PIM antibodies

Number of animals where antibodies detected (%)

18 (100 %)

10 (100 %)

< 0.999^d

Average PP value^c

44.7 ± 16.1

53.4 ± 22.8

0.249^e