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  1. 4 days ago · these diseases result from four different classes of causative pathogens: (i) protozoa (for chagas disease, human african trypanosomiasis, leishmaniases); (ii) bacteria (for buruli ulcer, leprosy, trachoma, yaws), (iii) helminths or metazoan worms (for cysticercosis/taeniasis, dracunculiasis, echinococcosis, foodborne trematodiases, lymphatic …

  2. It is acquired by swallowing water in which certain copepoda occur that act as vectors for the Nematoda. Anyone swallowing a copepod that happens to be infected with Nematode larvae in the genus Dracunculus, becomes liable to infection. The larvae cause guinea worm disease.

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