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Light micrographs of heparin 1-treated B. bovis in in vitro culture. Micrographs were taken on the first day of no treatment (A), treatment with 20 U of heparin per ml (B), and treatment with 100 U of heparin per ml (C). Note the increase in the numbers of abnormally multidividing forms (B) and free merozoites (C) (arrows) compared to those for the controls (A). Bars, 20 μm.
