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发表于 2011-12-5 20:54
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East Coast fever kills hundreds of thousands of cattle in easten and central Africa every year, the animals become infected when they get bitten by ticks carrying the parasite that causes the disease, a parasite is an organism that feeds on other organisms.
?? directs the animal disease research unit in the agricultural research service, part of the united states department of agriculture, the service is working with international ?? stock research institute in ?? to find better ways to prevent parasite diseases in cattle, Doctor ?? is also a professor at washington state university, he points out that east coast fever is not a contagious disease, so animals can not give it to each other |
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