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Table 2 Tick weights of I. scapularis collected from BravectoTM-treated and untreated dogs in Study 2

From: A quantitative evaluation of the extent of fluralaner uptake by ticks (Ixodes ricinus, Ixodes scapularis) in fluralaner (BravectoTM) treated vs. untreated dogs using the parameters tick weight and coxal index

Infestation

Collection

Tick weighta [mg]

BravectoTM

Negative control

Mean

Min

Max

Mean

Min

Max

Week 1

Daily after infestation

1.0e

0.7

1.2

1.7

1.5

2.4

0.9e

0.6

1.9

3.6

3.1

4.1

0.7e

0.6

0.8

6.2

4.8

9.4

0.6e

0.4

0.9

12.2

5.9

23.5

0.6eb

0.4

0.8

22.8

11.4

37.5

0.6c

0.6

0.6

17.8

10.1

38.7

N/A

N/A

N/A

16.2

7.8

23.2

N/A

N/A

N/A

23.1d

13.6

56.9d

N/A

N/A

N/A

23.3

12.1

35.2

N/A

N/A

N/A

21.1

11.7

30.7

Week 4

Approx.12 h after infestation

1.7

1.0

2.7

1.8

1.0

2.4

Week 8

1.6e

1.0

2.1

1.8

1.3

2.1

Week 12

1.6e

0.7

2.2

1.8

1.4

2.1

  1. N/A Not applicable because no ticks were found on dogs
  2. aArithmetic mean, minimum (Min) and maximum (Max) tick weight
  3. b, cLess than three ticks per dog were present at tick collection. Therefore, the mean tick weight was derived from four (b) or one tick (c) in the treated group
  4. cNo statistical analysis was performed because only one tick was recovered from treated group
  5. dThe mean tick weight was derived from seven ticks in the negative-control group because a fourth tick (d) dropped from one control dog after tick collection and was included in the assessment
  6. eTick weight in treated group is significantly different from negative control (p-values in the range of 0.0108 to < 0.0001)
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Parasites & Vectors

ISSN: 1756-3305

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