[in Japanese]

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1. A morphological study was carried on testes of four goats which had been affected with lumbar paresis (cerebrospinal filariasis) in their history. When autopsied, the macroscopic changes were observed rather likely normal in the testes of three goats, except possible few slight changes in weight, size, and color. However, in one case a deposition of crystalline material was found macroscopically. In the histological examination four goats had seminiferous tubules ranging from 184μ it to 219μ it in diameter. The crystalline material was proved to be calcium and the deposited area was found to be a seminiferous tubule itself.
2. Spermatogenic destruction was commonly observed in four cases though a degree of degeneration seemed to be variable from area to area even in one case. Beside the exfoliation of germ cells, karyolytic and multinucleate spermatids were frequently observed and binucleate spermatocytes were also encountered. Many tubules which lost the germinal epithelium completely were found.
3. An increased quantity of lipid material was found in many seminiferous tubules especially in those containing cell debris. The lipid in Sertoli cell seemed to be also increased than the normal. The interstitial tissue was found to be little changed from the normal. Those changes enumerated are fibrosis of connective tissue and an increase of lipid material.
4. Whether the destruction of spermatogenesis described here should be regarded as sequelae originating from the lumbar paresis (cerebrospinal filariasis) or the sequence of the side effects originating from piperazine-derivative and/or antimony agent which had been administered for treatment is not clarified.

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[in Japanese]

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1) Effects of in vitro aging on the DNA content of spermatozoa were studied with ejaculates from three Holstein bulls. The measurements of DNA were carried out cytophotometrically, using sperm in the semen stored at 5°C as control.
2) The content decreased in the dead sperm after 5 hr. incubation at 50°C, but no change occurred in the cold shock (with dry ice).
3) 35 hr. incubation at 37°C, both aerobic and anaerobic resulted in the different effect on the sperm DNA according to the initial amounts or the source of spermatozoa. There was no appreciable change in the bull [A] showing the highest initial content of sperm DNA, but it decreased in the bull [C] with the lowest content. In the bull [B] with the intermediate content, DNA decreased by the aerobic incubation.

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[in Japanese]

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[in Japanese]

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