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Table 1 Mean worm burdens in the abomasum and small intestine of lambs with 6-week old nematode infections either untreated, receiving daily mineral supplement with copper, or receiving COWP.

From: Evaluation of Copper Supplementation to Control Haemonchus contortusInfections of Sheep in Sweden

 

Group 1 Control

Group 2 Cu Supplement

p value 1 v's 2

Group 3 COWP

p value 1 v's 3

Abomasum

     

H. contortus

     

Adults

560

510

0.56

15

<0.001

Early L4

1525

1515

0.96

655

<0.001

Total

2085 (73%)*

2025 (75%)

0.74

670 (98%)

<0.001

T. circumcincta

     

Adults

220

85

0.14

60

0.06

Early L4

265

125

0.06

65

0.01

Total

485 (55%)

210 (60%)

0.06

125 (53%)

0.01

T. axei

     

Adults

100

135

0.41

60

0.30

Early L4

0

0

 

0

 

Total

100

135

0.41

60

0.30

Small Intestine

     

Trichostrongylus spp.

     

Adults

200

185

0.79

125

0.25

L4

0

0

 

0

 

Total

200

185

0.79

125

0.25

Nematodirus spp.

     

Adults

135

15

0.10

85

0.50

L4

0

0

 

10

 

Total

135

15

0.10

95

0.50

Cooperia spp.

     

Adults

10

15

 

0

 

L4

40

10

 

0

 

Total

50

25

 

0

 
  1. * number in parenthesis represents the percentage of infection as early L4 larvae