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Show 134 Utah Academy of Sciences, Arts am;l Letters [Vol. XV, technique in current use utilizes two distinct sources of data for diagnosing: (1) breeding history, and (2) microscopic examination for the etiological agent. , Though the breeding history of trichomoniasis is not absolutely peculiar Infected to it, it is distinctive and is of importance in preliminary diagnosis. In bulls have drastically reduced breeding efficiency, and suffer impotency. Seldom cows fecundity is likewise reduced and usually entirely suspended. does normal impregnation and gestation occur during the course of the in fection. The oestral cycle may be normal or interrupted. Validity of history, of course, presupposes freedom from Bang's disease. It may be For definite diagnosis microscopic examination is mandatory. accomplished by either of two methods: First, material may be extracted by means of appropriate applicators and cotton swabs from infected organs and examined microscopically. This method has been successfully employed in Utah. Second, in a similar manner exudate may be removed by swabs or washing and cultured in a suitable medium. Incubation and subsequent cen trifuging effect concentration of the pathogens, thus increasing the proba bility of their detection. This method is advocated by eastern workers. Both methods, however, are crude and in the developmental stages. Their failure to demonstrate trichomonads is inconclusive evidence for negative diagnosis. Distribution in Utah.e-dn 1936 dairy herds at the Utah State Agricul tural College reacted negatively to Bang's disease yet abortion and sterility problems were present. T'richornonads were demonstrated by D. E. Madsen, Other herds state animal pathologist, and pronounced as, the causative agent. of Cache Valley, .both beef and dairy types, were subsequently found infected. In other counties of the state breeding histories characteristic of trichomonia sis are present, and because of this condition a survey of incidence has been initiated. In addition to infections found in Cache Valley herds, animals in herds in Davis and Utah Counties have been diagnosed as definitely positive. Since that time symptoms have persisted in these herds but repeated attempts Whether this is due to a gradual to demonstrate the organisms have failed. diminution of the number of parasites to a point beyond demonstrability, or Herds in Sevier to change to a different stage of the infection is not known. and Piute Counties have breeding histories characteristic of the disease, but to date no trichomonads have been observed, although intensive studies have The infection is believed to have an extensive range in Utah. been made. Economic Im:portanc,e.-The economic effects of trichomoniasis on the cattle industry are profound and obvious.' While the infection persists repro duction is inhibited. Owners of valuable Utah dairy herds report that their infected cows are still sterile from infections contracted twelve months ago. Bibliography 1. 2. 3. 4. 5. 6. Emmerson, M. A. 1932. Jour. Amer. Vet. Assn., 81 N. S. 34, 636. Wenrich, D. H., and Emmerson, M. A. 1933. Jour. Morphol., 55, 193. Cameron, H. S., Fincher, M. G., and Gilman, H. L. 1933. Cornell Vet., Vol. XXIII, No.3, July. McNutt, S. H. 1934. Iowa Vet., 5 (3). McNutt, S. H., Walsh, F. E., and Murray, C. Cornell Vet., Vol. XXIII, No.2, April. 1933. Schmidt, H. 1937. Amer. Vet. Med. Assoc., Vol. XC, May. |
