Biomedical subjects

P Rittenbach

Publications and source records attributed to P Rittenbach.

At least 19 recordsLinked to original sources

PubMed1978

[Experimental study on cattle anemia due to immune antibodies. 3. Effects of anemia on the liver].

A characterisation in greater detail was undertaken of haemolytic anaemia caused by immune antibody and its effects on the liver of young cattle. Bioptate follow-up tests were applied to two animals, while bromosulphalein half-life and SGOT activity were determined in seven. Centrolobular liver necrosis was not reproducible. Some moderate liver cell damage was histologically detected. Certain responses recorded from the reticulohistiocytary part of the liver were interpreted as a consequence of aggravated damage to erythrocytes. The above moderate liver cell damage failed to produce statistically secured rises in bromosulphalein half-life nor SGOT activity.

Anemia, Hemolytic, Autoimmune↗

PubMed1975

[Studies on improving the fertility of aged sows. 3. Results of histological studies on puerperal involution and regeneration processes in the endometrium of lactating sows and sows after extremely early weaning].

Involution and regeneration following parturition was studied in 48 sows allowed to suckle their piglets normally, or from which the piglets were taken away at 5-8 days of age. Samples of uterus were obtained by biopsy 4, 8, 11, 14, 17, 20, 30, 32 and 40 days after parturition. In lactating sows, endometrial changes similar to those of oestrus in a normal cycle were present 32 days after parturition. This fact seems to justify the removal of piglets at 21-28 days of age. After very early weaning (5-8 days), incomplete oestrus-like changes in the endometrium were seen on the 17th day after parturition. The observed involutionary and regenerative changes in the puerperal uterus suggest that early weaning after 10-12 days of suckling is feasible, but it may be advisable to use drugs that would accelerate uterine involution.

Animals↗

PubMed1975

[Studies on improving the fertility of aged sows. 2. Results of histological studies on the structure of the endometrium in aged sows during estrous cycle].

Histomorphological and histometric techniques were employed to study cyclic processes in the endometrium. Specimens of uterus were obtained on the 1st, 5th, 8th, 13th, 17th and 21st days of the cycle. The effect of oestrogens, which are produced in large amounts during pro-oestrus, oestrus and to some extent in metoestrus, was reflected in proliferative processes in the epithelium, with increases in the cell population, thickness of the epithelium, and height of the superficial and glandular epithelium. During oestrus the subepithelial layer was broad and was rich in lymphocytes and neutrophile grandulocytes, while the lamina propria showed considerable oedema and hyperaemia. The action of gestagens during dioestrus led to an increase in glandular structures due to the development of more convolutions and a more even distribution of glands throughout the entire propria. There was evidence of active glandular secretion, which during the course of dioestrus resulted in a relatively low and single-layered superficial and glandular epithelium.

Animals↗

PubMed1973