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Summary The effect of terramycin hydrochloride on the motility of bovine spermatozoa and on bacterial growth of bovine semen diluted with citrate buffered egg yolk and stored at 5° C. was investigated. It was found that 20mg. of terramyein hydrochloride could be added per 100ml. of diluted semen without spermicidal effects. This level of the antibiotic was bacteriostatic and/or bactericidal. On the basis of these results, higher concentrations of this material in diluted bull semen are not recommended.
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Stallcup et al. (1953) studied this question.
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