共查询到20条相似文献,搜索用时 0 毫秒
1.
2.
3.
4.
5.
6.
The objectives were to determine effects of cornual insemination on endometrial characteristics and uterine bacterial flora. Forty cows were assigned randomly (10/group) to each of the following treatments: 1) control--no uterine manipulation; 2) uterine body insemination--deposition of the inseminate at the internal cervical os; 3) cornual insemination--one-half of inseminate deposited into each uterine horn anterior to the internal bifurcation and 4) cornual insemination plus endometrial biopsy--insemination into each uterine horn and trauma induced by endometrial biopsy. Animals were slaughtered and reproductive tracts were removed 5 d after treatment. Bacterial populations of the uterine lumen were evaluated by both flushings and swabbings of each horn. Treatment did not influence the presence of luminal bacteria as determined by flushing or swab samples. Gross endometrial characteristics were quantitated in all tracts. Characteristics considered were total endometrial surface area, discolored regions that appeared to be distinctly darker than the remaining portion of the endometrium and obvious surface damage. Discolored regions were evaluated as both total areas and percentage of endometrium. Treatment did not influence total or percent discolored areas. Microscopic evaluation of these tissues revealed increased edema when compared with nondiscolored regions but no disruption of the luminal epithelium was found. Surface damage was found only in the biopsied treatment group. Observation of the endometrium revealed that extensive regeneration occurred by 5 d after treatment. The data suggest that cornual insemination does not result in uterine trauma or bacterial presence 5 d after breeding, and the endometrium is capable of regeneration after trauma during estrus. 相似文献
7.
8.
9.
10.
M. Elizabeth Davies 《Veterinary research communications》1979,3(1):39-44
The use of a continuous culture artificial colon is described in experiments with caecal and dorsal and ventral colonic contents from the horse. The activity of the system was measured by volatile fatty acid estimation and the percentage of hay and cellulose digested was calculated. The vitamin B12 (cyanocobalamin) content of the continuous culture and the amount synthesised by individual bacteria isolated from the system and directly from the colonic content, was estimated. 相似文献
11.
12.
13.
Observations on the bacterial flora of the alimentary tract in three age groups of normal chickens 总被引:4,自引:0,他引:4
L Timms 《The British veterinary journal》1968,124(10):470-477
14.
《Livestock Production Science》1986,14(2):161-176
Nine growing pigs (10–40 kg) were cannulated either in the duodenum or ileum or caecum and fed a dry-milk powder diet. These pigs were used as donors of fresh intestinal contents for short (4 h) incubation experiments. From the incubations of duodenal contents, it appeared that the bacterial activity was not important. In consequence, the antibiotic effects of Virginiamycin and Spiramycin were also negligible. During incubations of ileal contents, eventually supplemented with free amino acids, on the other hand, 20–30% of the amino acids were degraded by the flora either by deamination, with formation of ammonia, or by decarboxylation with formation of amines: histamine, putrescine, cadaverine, tyramine, phenylethylamine. Cadaverine, the decarboxylation product of lysine, was the most important amine detected. Both processes were severely decreased when the antibacterials Virginiamycin (50 p.p.m.), Spiramycin (50 p.p.m.), Carbadox (50 p.p.m.) and copper sulphate (200 p.p.m.) were present during the incubation of the ileal contents. The fermentation of caecal contents was characterized by a pronounced production of ammonia, slightly inhibited by Virginiamycin and Spiramycin.Testing the amino acid decarboxylation activity of the dominant flora (E. coli, S. faecalis, L. acidophilus and L. fermenti) in the small intestine of the pig, it was found that E. coli is the main producer of amines in the small intestine of pigs.We conclude that the gut flora of pigs has a measurable negative influence on protein digestion in the small intestine and that this effect can be overcome by feeding nutritional antibacterials. 相似文献
15.
The intestinal flora in pigs with parakeratosis. V 总被引:1,自引:0,他引:1
I M?nsson 《Acta veterinaria Scandinavica》1965,6(3):261-267
16.
17.
18.
19.
20.
Studies were conducted into the quantitative composition of the gastro-intestinal flora in clinically intact store pigs. The methods are described in greater detail, followed by presentation of results. In the discussion particular reference is made to literature. Conclusions are drawn regarding the topographic distribution of the various germ groups in the gastro-intestinal tract of the store pig. 相似文献