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The youngster had succumbed to a massive liver-fluke infestation. It was the worst he had ever seen. The bile ducts were thick, calcified and choked with literally thousands of the gray-green leaf-shaped trematodes. "Let's look at the others," he said. Two more post-mortems confirmed the diagnosis. Except for minor differences, the lesions were identical.
In other words, kill the flukes before they enter the Lani." "Old Doc never said anything about this," Blalok said. "Probably he never knew about it. I was looking over the herd books last night, and I saw nothing about trematodes, or anything that looked like a parasite pattern until the last few months." "Why not?" "My guess is that he was one of the first deaths."
Like all trematodes it has a three-stage life cycle, but unlike every other fluke, its life cycle is not fixed to definite intermediate hosts. Depending upon where it is, the fluke adapts. It still must pass through its life cycle, but its intermediate host need not be one species of snail, fish, or copepod. Any cold-blooded host will do.
Atkinson gave us an interesting little discourse on parasitology, with a brief account of the life history of some ecto- and some endo-parasites Nematodes, Trematodes. He pointed out how that in nearly every case there was a secondary host, how in some cases disease was caused, and in others the presence of the parasite was even helpful.
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