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first report of trypanosoma vivax infection in dairy cattle from costa outbreak of haemoparasitoses occurred from october 2007 to july 2008 in cattle from the district of rio cuarto, province of alajuela, costa rica. fifty animals of various ages out of 450 brown swiss were affected. the animals presented fever, severe anemia, jaundice, abortion or premature birth, loss of appetite, decrease milk production and accentuated weight loss in a short period of time. haemoparasites were observed in the blood smears: anaplasma marginale was present in 17 animals (60.7% ...200919414224
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