Propionate loading test for liver function in spontaneously ketotic dairy cows     

Y Gr?hn 《Research in veterinary science》1985,39(1):24-28

Propionate utilisation by the liver in spontaneously ketotic dairy cows was investigated by determining blood glucose levels after an intravenous sodium propionate load (2.5 mmol kg-1). In addition, blood ketone body concentrations were measured after propionate loading. Cows were divided into three groups (control, mildly ketotic and severely ketotic) by their blood acetoacetate concentrations. Plasma glucose concentrations increased significantly after sodium propionate injection in all three groups (P less than 0.05). The maximum glucose concentration occurred earlier in the control group than in the ketotic groups. Changes in glucose concentrations following propionate loading of control and ketotic cows differed significantly at 20 minutes and beyond. Differences in the change in glucose concentration between mildly ketotic and severely ketotic cows were not significant. Acetoacetate concentration was significantly decreased at five minutes and beyond after the injection in ketotic cows, whereas beta-hydroxybutyrate concentration decreased more slowly. A decrease in beta-hydroxybutyrate concentration was significant at 40 minutes and beyond in the severely ketotic group and at 10 minutes and beyond in the mildly ketotic group after loading.  相似文献   

Plaque assay of bovine coronavirus in BEK-1 cells   总被引：1，自引：0，他引：1  

N Hirano  Y Sada  K Tuchiya  K Ono  T Murakami 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1985,47(4):679-681

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Effect of active vitamin D3 analogs on the osteoporosis of rats caused by ovariectomy     

Y Izawa  T Makita  H Ichiki 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1985,47(3):349-356

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Bovine leukaemia virus and enzootic bovine leukosis     

A Burny  C Bruck  Y Cleuter  D Couez  J Deschamps  D Gregoire  J Ghysdael  R Kettmann  M Mammerickx  G Marbaix 《The Onderstepoort journal of veterinary research》1985,52(3):133-144

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Bacterial diseases of potatoes in the major potato-growing areas in Turkey1     

K. BENLIOLU  Y. E. KTEM  M. ZAKMAN 《EPPO Bulletin》1991,21(1):67-72

In 1988 and 1989 bacterial diseases of potatoes in Central Anatolia were investigated by utilizing the EC method for the detection of ring-rot bacterium (Clavibacter michiganensis ssp. sepedonicus) and using selective medium. 91 samples containing 200 tubers from commercial and farmers’ stores in Central Anatolia were tested for the presence of C.m.sepedonicus and about 50 tubers of each sample were also tested for the presence of soft-rot erwinias. Five different bacteria that cross-reacted with C.m.spedonicus antisera were isolated from heel-end extracts. All cross-reacted bacteria differed from C.m.sepedonicus morphologically and none of them was pathogenic on eggplant. C.m. sepedonicus was not detected, but Erwinia carotouora ssp. carotouora and Erwinia carotovora ssp. atroseptica were present in 7 and 17% of the samples respectively.  相似文献   

Responses of peripheral blood mononuclear cells in calves infected with Theileria sergenti     

Y Yasutomi  M Onuma  H Asaoka  Y Kawakami 《Veterinary parasitology》1991,39(1-2):33-41

The role of peripheral blood mononuclear cell (PBMC) in Theileria sergenti-infected calves was studied by various in vitro assay systems. Proliferation of T cells in mixed lymphocyte protozoa culture (MLPC) increased with parasitemia, and the addition of monoclonal antibodies against T. sergenti merozoites in this MLPC enhanced the response. However, the addition of antibody-positive autologous serum resulted in the suppression of the response. Cell-mediated cytotoxicity of PBMC increased after peak parasitemia. This cytotoxicity increased on co-cultivation of PBMC with T. sergenti merozoites, but the addition of autologous serum suppressed the response.  相似文献   

Sero-epidemiological and pathological studies on enzootic bovine leukosis in Turkey.     

I Burgu  H K Urman  O R Kaaden  U Truyen  Y Ak?a  G Alcigir  S Berkin  F Alkan  A Atasever 《DTW. Deutsche tier?rztliche Wochenschrift》1991,98(6):226-228

The prevalence of enzootic bovine leukosis (EBL) in Turkey was investigated by serological screenings using the agargel immunodiffusion test (AGID). A total of 4,047 blood samples obtained from 2,780 cattle between one and 14 years of age and taken in 6-8 month-intervals in three dairy farms were tested for the presence of EBL-specific antibodies. A high prevalence of EBL-sero-positive animals was found amongst cattle in two of the farms. Furthermore, recommendations based upon the regulation implemented by an expert group of the European Commission and considering the local dairy management conditions were presented.  相似文献   

Survey of the reproductive features and insemination/mating results in full blood Arabian and Haflinger mare herds on stud farms in west and middle Anatolia     

N Tekin  N Yurdaydin  E Klug  Y Yavas  A Aksu  F Gülyüz 《DTW. Deutsche tier?rztliche Wochenschrift》1991,98(9):350-352

Within a German-Turkish university partnership documentation of reproductive data of brood-mares was performed as a part project of the cooperation contract. In the study Arab, Haflinger and cross-breed mares were included. The mares mainly were housed in big studfarms and a smaller part was kept under small private farms. Almost three quarters of both the Arab and Haflinger mares exhibited an estrous length of 1-4 days, whereas the others showed a heat duration of a period of 5-10 days. In the same group of probands a mean length of sexual cycle of 18-24 days could be observed in 38.2% of the Haflinger. The majority of the other mares in both races documented a cycle duration of more than 25 days. The remarkable short duration of heat is discussed as caused by the sharp change from winter to spring environment conditions in that area. An explanation of the marked long mean cycle interval is difficult and might be caused by inadequate documentation of the data. Conception results and foaling data as 83.4% resp. 78.8% in the Arabs and 76.6% resp. 74.8% in the Haflinger mares are within the international standard. Conception rate and foaling data in the cross-breed (72.3% resp. 55.3%) are low compared with data (96.9% 70.8%) of Arab brood-mares kept under stud condition in that area. These data point out the necessity of improving pre- and postconceptional care of the mares under stud conditions as well as in private keeping.  相似文献   

Density of steam-flaked sorghum grain, roughage level, and feeding regimen for feedlot steers.   总被引：3，自引：0，他引：3  

Y Xiong  S J Bartle  R L Preston 《Journal of animal science》1991,69(4):1707-1718

Two hundred fifty-two steers (366 kg) were assigned to a 3 x 2 x 2 factorial arrangement of three densities of steam-flaked sorghum grain (bulk [flake] density of 437, 360, and 283 g/liter, B34, B28, and B22, respectively), two roughage levels (9 [R9] and 18% [R18]) and two feeding strategies (ad libitum [AD] or multiple of maintenance [MM], 2.3, 2.5, and 2.7 MM for wk 1, 2, and 3, and 2.9 MM thereafter). Steers fed R18-AD gained faster than steers fed R18-MM (1.59 vs 1.52 kg/d, P = .10); for R9 diets, no difference (P greater than .25) was found between steers fed AD and MM (interaction, P = .07). Flake density did not affect ADG (1.53 kg, P greater than .2). Dry matter intake decreased (9.8, 9.3, and 9.0 kg/d, linear, P less than .001) and gain efficiency (G/DMI, kg of gain/100 kg of DMI) increased (15.7, 16.5, and 16.9, linear, P less than .001; quadratic, P = .19) as processing degree increased (B34 to B22). Percentage of choice carcasses for B34 (67.0%) was higher (linear, P = .05) than for B28 (51.9%) and B22 (52.3%). Fecal starch and pH were 10.8, 5.7, and 4.0%, and 6.11, 6.23, and 6.37 for B34, B28, and B22, respectively (linear, P less than .001). The correlation between fecal starch and pH was -.51 (P less than .001, n = 252). Enzymatic glucose release, in vitro 6-h gas production, microbial protein synthesis, and protein degradability were 375, 483, and 559 mg/g; 24.7, 28.2, and 31.1 ml/.2 g; 6.15, 6.88, and 7.84 g/100g; and 61.4, 56.6, and 42.2% for B34, B28, and B22, respectively (linear, P less than .05).(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

Effect of human growth hormone-releasing factor and(or) thyrotropin-releasing factor on growth, carcass composition, diet digestibility, nutrient balance, and plasma constituents in dairy calves   总被引：3，自引：0，他引：3  

H Lapierre  G Pelletier  D Petitclerc  P Dubreuil  J Morisset  P Gaudreau  Y Couture  P Brazeau 《Journal of animal science》1991,69(2):587-598

Sixty male dairy grain-fed calves, raised from 70 to 223 kg BW in individual crates, were used in a 2 X 2 factorial arrangement to determine the effect of administration of human growth hormone-releasing factor (1-29)NH2 (GRF) and(or) thyrotropin-releasing factor (TRF). Calves received twice-daily s.c. injections of .9% NaCl (control), GRF (5 micrograms/kg BW), TRF (1 micrograms/kg BW) or GRF (5 micrograms/kg BW) plus TRF (1 micrograms/kg GTRF). Average daily gain and days on feed were not affected by treatments, but TRF treatment increased (P less than .05) total intake of dry matter (DM) and feed conversion ratio: 3.00, 3.02, 3.08, and 3.22 kg DM/kg weight gain for control, GRF, TRF, and GTRF, respectively. During two 7-d periods, after 66 and 75 d of treatment, feces and urine were collected from 40 calves (5 per treatment per period). Treatment with GRF increased (P less than .05) digestibility of DM, nitrogen (N), and energy and tended (P less than .20) to increase N retention. At slaughter, withers height was increased (P = .05) by GRF and carcass length was increased (P less than .05) by TRF. Pituitary and liver weights were increased (P less than .05) by TRF. The combination of GRF and TRF slightly increased (P less than .10) protein content and decreased (P less than .05) fat content of the 9-10-11th rib section. After d 1, GRF treatment chronically increased (P less than .05) insulin concentrations and also increased (P less than .10) IGF-I concentrations on d 29 and 57. In summary, chronic treatment with GRF and(or) TRF did not improve growth or efficiency, although GRF increased digestibility of DM, N, and energy and the GRF plus TRF combination resulted in slightly leaner carcasses.  相似文献