TRICHOMONAS FOETUS IN BULLS1

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Abstract
A method of detecting T. j. in bulls based upon the microscopic and cultural examination of separate ejacu-latory fractions from the sheath, seminal vesicles, and ampullae obtained by intrarectal massage is descr. More positives were obtained by microscopic than by cultural examination though the combined results exceeded those of either method. Organisms were found most frequently in the seminal fraction; least frequently in the sheath flushings. These examinations failed to reveal more than half the actual number of infected bulls. Trichomonads were found post mortem only on the glans penis and prepuce of 3 bulls though other parts of the genitalia were carefully searched. One bull remained infected for at least 11 rnos. without opportunity for reinfection. The only dependable method of control is prevention. This may be achieved by breeding clean bulls only to unexposed heifers and cows by natural service, and by breeding exposed heifers and cows either to infected bulls naturally or to clean bulls by artificial insemination.

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