Summary The effect of polymyxins D, B and E and aureomycin on the motility of bovine spermatozoa and upon the control of bacterial growth in bovine semen extended with citrate buffered yolk and stored at 5° C. was investigated. It was found that 2000 μg. of polymyxins D, B or E, or 100 μg. of aureomycin could be added per ml. of extender without spermicidal effects. These levels of antiobiotics were highly bacteriostatic and/or bactericidal.
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Foote et al. (1950) studied this question.
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