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| 6. Lung Worm Disease in Cattle |
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| 1) Husky coughing of infected cattle, as to blow off a foreign body in the trachea. | 2) A number of lungworms harboring bronchi of the lungs. |
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| 3) A number of lung worms seen in the trachea. | 4) Adult worm of Dictyocaulus viviparus. |
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