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Tables Accompanying the Article “Resistance to Internal Parasites in
Lambs of Hair Sheep Composite Breeds”

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Table 1: Means and standard errors for body weights (lb), fecal egg counts (FEC; eggs/gram of feces) and packed cell volume (PCV; %) during infection for ewe lambs in drylot following artificial infection with barber-pole worm (Haemonchus contortus) over 3 years

Measurement

Breed

Group1

Year

2000

2001

2002

Average

Mean body wt

DO

91.8 ± 1.1

90.7 ± 0.8

86.8 ± 1.5

89.8 ± 0.7

DP

103.3 ± 1.6

84.9 ± 1.0

89.7 ± 1.1

92.6 ± 0.7

KT

90.7 ± 1.1

90.5 ± 1.2

85.2 ± 1.2

88.8 ± 0.7

Mean FEC

DO

897 ± 122

2835 ± 303

2490 ± 468

2074 ± 190

DP

1064 ± 219

4064 ± 541

3866 ± 564

2998 ± 271

KT

539 ± 79

1188 ± 188

1720 ± 265

1149 ± 114

Mean PCV

DO

27.9 ± .5

25.0 ± .4

26.1 ± .7

26.3 ± .3

DP

29.5 ± .8

26.2 ± .5

25.5 ± .6

27.1 ± .4

KT

30.8 ± .6

28.9 ± .6

26.2 ± .6

28.6 ± .3
  1. DO = Dorset crossbred, DP = Dorper crossbred, and KT = Katahdin.
Table 2: Means and standard errors for body weights (lb), fecal egg counts (FEC; eggs/gram of feces) and packed cell volume (PCV; %) during infection for wether lambs following deworming and return to contaminated pastures over 2 years

Measurement

Breed
Group2

Year

2001

2002

Average

Mean body wt

DO

69.6 ± 1.0

83.2 ± 1.3

76.4 ± 0.8

DP

71.6 ± 1.1

81.1 ± 1.2

76.4 ± 0.8

KT

50.3 ± 1.4

90.8 ± 1.6

70.6 ± 1.1

HH

53.5 ± 1.4

65.5 ± 1.4

59.5 ± 1.0

Mean FEC

DO

1556 ± 151

953 ± 123

1255 ± 97

DP

1556 ± 160

944 ± 108

1250 ± 97

KT

1012 ± 135

351 ± 55

682 ± 73

HH

437 ± 60

284 ± 39

361 ± 36

Mean PCV

DO

24.4 ± 0.6

33.9 ± 0.8

29.2 ± 0.5

DP

25.9 ± 0.6

35.5 ± 0.7

30.7 ± 0.5

KT

26.1 ± 0.8

32.8 ± 1.0

29.5 ± 0.6

HH

27.4 ± 0.9

32.6 ± 0.9

30.0 ± 0.6
  1. DO = Dorset crossbred, DP = Dorper crossbred, and KT = Katahdin.

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Reprinted from BBSAI Newsletter, December, 2003.
Copyright 2003 BBSAI. All rights reserved.

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