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Inhalt Von 5 Besamungsebern wurde in 4 zeitlich auseinanderliegenden Kombinationen Disperma zum Zwecke eines Fertilitdtstestes eingesetzt. In 2 der 4 Kombinationen wies der disperme Befruchtungstest eine erhebliche Diskrepanz zur parallel monosperm durchgeführten Fertilitätsprüfung auf. Für 2 Eber (Eber B and C) ergaben 2 verschiedene disperme Tests widersprüchliche Fruchtbarkeitswerte. Die disperme Insemination zum Zwecke eines Fertilitätstestes ist somit unbrauchbar. Contents Studies on the suitability of disperm for testing the fertility of A. I. boars. Disperm from 5 A. I. boars was used in four time combinations to test the fertility of these boars. In two of the four combinations the dispermic fertility test showed a considerable discrepancy with the fertility test made simultaneously with monosperm. For boars B and C, two different dispermic tests gave contradictory fertility results. Dispermic insemination is thus unsuitable for fertility tests. 相似文献
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As in other studied species the exclusively on the epithelial side existing ‘fenestrated endothelium’ of the pericryptal and subepithelial capillaries is doubtless the most important structural mark of the large intestinal function, too. Moreover, the direction of the mucosal capillary blood flow informs, that at first the release of the essential substances for the glandular secretion will take place, before epithelial transports concerning the resorption occur. As for the hemodynamic regulatory structures in the wall of the blood-vessels there are obviously differences in their existence depending on the species, respectively they are completely absent such as in the ruminants. Finally, it should be mentioned, that arterio-venous anastomoses could not be detected. 相似文献
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O. Krennrich 《Reproduction in domestic animals》1971,6(4):154-164
A review of the literature is presented on the strains of Mycoplasma isolated from the bovine genital tract and their relationship to infertility. Although Mycoplasmas have frequently been isolated from the genital organs of bulls, no typical clinical symptoms have been observed and no detrimental effects on spermatozoa have been shown. Mycoplasmas can be transmitted to cows by artificial insemination. In contrast to bulls, Mycoplasmas have been described as causing inflammatory changes such as cervicitir, endometritis and salpingitis in cows. Salpingitis, which may lead to obstruction of the oviduct, has the most serious consequences of later infertility. The author's own observations on the occurrence of Mycoplasmas in the herds in one area are briefly described. Prophylactic and therapeutic measures against genital Mycoplasma infections in cattle are also given. 相似文献
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