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Table 2 The total number of ticks recovered and their attachment status, feeding status and condition

From: Development of a low-dose fipronil deer feed: evaluation of efficacy against two medically important tick species parasitizing white-tailed deer (Odocoileus virginianus) under pen conditions

Ixodes scapularis

Test group

Outcome for introduced ticks by end of 8-day observation period in terms of attached/ detached

Females (n)

Males (n)

Initial no. ticks placed on deer

No. ticks recovereda

Recovery (%)

Flat

Partially engorged

Fully engorged

Alive

Dead

Alive

Dead

Alive

Dead

Alive

Dead

T48 (48-h FDF exposure)

Attached

0

57

1

45

1

0

1

11

280

210

75

Detached

0

8

0

3

13

1

0

69

T120 (120-h FDF exposure)

Attached

0

55

1

19

0

0

0

12

280

221

78.9

Detached

0

48

0

1

1

0

0

84

Control

Attached

0

19

7

40

0

0

0

5

280

141

50.4

Detached

0

2

1

1

45

2

1

18

Amblyomma americanum

Test group

Outcome for introduced ticks by end of 8-day observation period in terms of attached/ detached

Females (n)

Males (n)

Initial no. ticks placed on deer

No. ticks recovereda

Recovery (%)

Flat

Partially engorged

Fully engorged

Alive

Dead

Alive

Dead

Alive

Dead

Alive

Dead

T48 (48-h FDF exposure)

Attached

3

31

13

54

0

0

17

41

280

219

78.2

Detached

0

19

0

3

0

0

26

12

T120 (120-h FDF exposure)

Attached

1

44

4

50

0

0

3

66

280

199

71.1

Detached

0

18

2

0

0

0

11

0

Control

Attached

22

0

94

0

0

0

101

6

280

236

84.3

Detached

0

0

0

1

0

0

12

0

  1. These data are for both Ixodes scapularis and Amblyomma americanum introduced onto white tailed deer fed FDF versus deer fed untreated placebo feed
  2. aRecovered ticks refer to ticks collected within the capsules. An additional 49 I. scapularis (12 female, 37 male) and 29 A. americanum (22 female, 7 male) were found trapped in the veterinary wrap collars. These data were excluded because we could not determine which specific animals these ticks were parasitizing