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Ruminant Lungworms and Miscellaneous Nematodes

Ruminant Lungworms and Miscellaneous Nematodes. Dictyocaulus. Large size Dictyocaulus in large airways. Yearling calf with “anoxic syndrome” during prepatent (1-3wk, phase II) of massive lungworm infection. “ Anoxic syndrome ”.

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Ruminant Lungworms and Miscellaneous Nematodes

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  1. Ruminant Lungworms and Miscellaneous Nematodes

  2. Dictyocaulus

  3. Large size Dictyocaulus in large airways.

  4. Yearling calf with “anoxic syndrome” during prepatent (1-3wk, phase II) of massive lungworm infection.

  5. “Anoxic syndrome” Initial lungworm infection 1-7 days is not associated with clinical signs.

  6. Lung lobe showing severe intersitial edema inflammation. Lesions and worms are concentrated in diaphragmatic and cardiac lobes.

  7. Pulmonary emphysema, bovine lungworms

  8. Pulmonary emphysema, bovine lungworms

  9. Histopathological Lesions Eosinophilic granulomatous inflammation with eventual alveolar epithelialization.

  10. Muellerius - alveolar level “blister lesions” of the sheep and goat protostrongylid lungworm transmitted by land snail intermediate host.

  11. Notched tail of Muellerius L1.

  12. Protostrongylus is a related lungworm that resides more toward the terminal bronchioles, with larger infarct-like lesions on the serosal surface.

  13. Stephanofilaria - umbilical lesion

  14. Stephanofilaria - Horn fly as intermediate host.

  15. Stephanofilaria - Histopathological lesions involve eosinophilic granulomatous inflammation.

  16. Muzzle disease due to Eleophora in sheep >5000 feet Rocky mountain ranges shared by deer, the “normal” host.

  17. Eleophora sometimes resides in digital arteries, with similar dermatitis of the lower limb.

  18. Adult filarid Eleophora in carotid arteries; microfilaria, debris as swept up to muzzle skin, resulting in inflammation, necrosis.

  19. Thelazia Infection

  20. Musca autumnalis (face fly) intermediate host of Thelazia lacrimalis in the Eastern U.S. The lesser housefly (Fannia spp) transmits eyeworms in the West.

  21. Thelazia effects

  22. Filarids: Site and Hosts

  23. Setaria microfilariae circulate in peripheral blood to be picked up by mosquito intermediate host.

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