Toxic elements in the sex organs of the cow and their relationship to fertility     

E Kudlác  I Simoník 《DTW. Deutsche tier?rztliche Wochenschrift》1990,97(10):396-398

The content of heavy metals (Cd, Hg, Pb, Cr, Cu and Zn) has been determined by atomic absorption spectrophotometry in parts of genital organs of cows with and without reproductive disorders, in blood, in placenta, in colostrum, and in the calf blood. The samples were collected in an industrially polluted area and in a relatively non-polluted area. It has been proven in the group of 99 cows that the biological quality of the oestrous cervical mucus is also influenced by toxic elements. The best conception rate after the artificial insemination (80.0%) has been found in cows with the cervical mucus without spermiotoxic properties. The genital organs of 49 cows culled because of reproductive disorders were examined. No significant differences in the content of heavy metals have been found in the separate parts of genital organs. There were also no differences between the cows with and without reproductive disorders. Toxic elements in blood have been found in cows after parturition and in newborn calves both in the polluted and the non-polluted areas. However, significant differences (p less than 0.01) were determined only in the content of Cd and Zn. The average content of all determined toxic elements in the samples of placenta in pluriparous and primiparous cows from the polluted and non-polluted areas was approximately at the same level. The content of Zn was 4.3 times higher than the hygienic standard in the colostrum of cows from the polluted area. The content of Zn exceeded the hygienic standard also in the non-polluted area, and the content of Cd and Hg was close to the hygienic standard there.  相似文献   

Acid-base balance of dogs in obstetrical clinical practice     

O Szenci  G Rónay  I M?rcz 《Acta veterinaria Hungarica》1986,34(1-2):109-115

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Clinical and pathological effects of the dermonecrotic toxin of Bordetella bronchiseptica and Pasteurella multocida in specific-pathogen-free piglets   总被引：1，自引：0，他引：1  

B Eliás  G Boros  M Albert  S Tuboly  P Gergely  L Papp  I Barna Vetró  P Rafai  E Molnár 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1990,52(4):677-688

The role of dermonecrotic toxin (DNT) of Bordetella bronchiseptica and Pasteurella multocida, purified by repeated chromatography in Sephacryl S-200 gel, in the pathogenesis of atrophic rhinitis (AR) of swine was studied bacteriologically, clinically and pathologically. Two-week-old specific pathogen-free (SPF) piglets were parenterally treated with 30 micrograms of DNT 3 times at 2-day interval and 7-week-old piglets were treated with 15 micrograms of DNT twice a week for 5 weeks. In 2- to 3-week-old piglets, both B. bronchiseptica DNT and P. multocida DNT produced nasal turbinate lesions with similar severity, characterized by damage of the cilia, epithelial metaplasia, intensive proliferation of osteoblasts, regressive changes, and diffuse osteocytic osteolysis. In 7- to 12-week-old piglets, treatment with B. bronchiseptica DNT failed to produce progressive changes in the nasal turbinates. Histopathological examination revealed osteogenic processes and osteoid synthesis besides the proliferation of osteoblasts and mild osteocytic osteolysis. Moreover, severe gross pathological lesions developed in the stomach, liver, kidneys, and lymphoid organs. The piglets' appetite and body weight gain gradually decreased during the DNT treatment and in the last week when the toxic signs appeared. Treatment of 7- to 12-week-old piglets with P. multocida DNT resulted in progressive AR. Histopathologically, diffuse osteocytic osteolysis was observed in the nasal turbinates. Neither clinical signs nor pathological lesions of the visceral organs developed in these piglets. The authors emphasize that the DNT of B. bronchiseptica basically differs from that of P. multocida in biological properties, though there are certain similarities between the DNTs.  相似文献   

Pathophysiology of the periparturient egg rise in sheep: the role of prolactin     

I A Jeffcoate  G Fishwick  K Bairden  J Armour  P H Holmes 《Research in veterinary science》1990,48(3):295-300

The involvement of prolactin in the periparturient rise in the faecal nematode egg count in sheep was investigated. Ostertagia circumcincta larvae (5000 third stage larvae three times weekly) were administered to adult immune ewes from three weeks before parturition to three weeks afterwards. Ten ewes were injected twice daily with 2-bromo-alpha-ergocryptine (bromocriptine), an antagonist of prolactin secretion, for two weeks starting two days after lambing while 10 ewes remained untreated. Bromocriptine treatment was initiated approximately two weeks pre partum in three other ewes. Plasma pepsinogen concentrations rose significantly by one week after the start of O circumcincta larval challenge in all the ewes but faecal egg counts remained negative until approximately one week post partum. Plasma prolactin concentration was reduced to a very low level in all bromocriptine treated ewes but this did not alter the dynamics of the periparturient rise in faecal egg counts. Neither cell-mediated nor humoral immunity of the ewes, as assessed by their sensitivity to BCG inoculation and by antibody titre raised against horse red blood cells, respectively, were impaired during the rise in faecal egg count, nor were these parameters altered by manipulation of plasma prolactin concentration. Lamb growth rate was not retarded by low plasma prolactin concentration in the bromocriptine treated ewes. These results are not consistent with the generally held hypothesis that elevated plasma prolactin concentration is directly associated with the periparturient rise.  相似文献   

Detection of African horsesickness (AHS) in recently vaccinated horses with inactivated vaccine in Qatar     

M M Hassanain  A I al-Afaleq  I M Soliman  S K Abdullah 《Revue d'élevage et de médecine vétérinaire des pays tropicaux》1990,43(1):33-35

Two 7-year old Arabian racing horses were reported to show typical AHS symptoms in Qatar and died shortly after. The horses had been vaccinated with formol inactivated vaccine approximately 10 days before the onset of the disease. Blood samples from these horses were collected and AHS virus isolated from one sample after intracerebral (i.c.) inoculation into suckling mice. The virus identity was confirmed by complement fixation test (CFT) using the virus antigen and reference type 9 of AHS virus hyperimmune serum. The serotype of the isolated virus was identified by serum neutralization test (SNT) using reference types of AHS virus. Two possibilities of the original source of this infection were suggested. The infection might be due first to the natural endemic occurrence of the virus in the country and secondly, to the presence of residual infectious virus in the inactivated vaccine.  相似文献   

Non‐linear thermodynamic laws application to soil processes     

I. Khabirov 《Archives of Agronomy and Soil Science》2013,59(5):387-393

An attempt has been made to analyze the possibility to use nonequilibrium thermodynamics for the soil dynamic open systems’ treatment. Entropy change of such a system is expressed by the entropy sum produced within the system and the entropy coming from or going into the outer sphere.

In the steady state, dynamic soil‐formation processes occur within an organized structure and are characterized by stable parameters close to equilibrium. Accordingly, when examining soil, one can proceed from the conventional thermodynamic equilibrium. However, the matter of Onzager‐Prigozhin general phenomenological theory applicability to soil processes is more complicated. To study soil stability it is necessary to go beyond the limits of linear thermodynamics.  相似文献   

Survival of the Newcastle disease vaccine virus in the air of poultry houses]     

R G Mavlikaev  Iu S Dutko  V I Burtsev  V I Lagunov 《Veterinariia》1979,(8):23-25

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Novel quinoline alkaloid from trunk bark of Galipea officinalis.     

I Jacquemond-Collet  S Hannedouche  I Fourasté  C Moulis 《Fitoterapia》2000,71(5):605-606

The isolation of N-methyl-4-hydroxy-3-(2',3'-epoxyisobutyl)-2-quinolone (1), a new natural compound, and candicine (2) from Galipea officinalis trunk bark is reported. This is the first report of candicine in the genus Galipea.  相似文献   

Effects of Population Density on the Vegetative Growth of Leafy Reduced-stature Maize in Short-season Areas     

S. H. Begna  R. I. Hamilton  L. M. Dwyer  D. W. Stewart  D. L. Smith 《Journal of Agronomy and Crop Science》1999,182(1):49-55

Maize hybrids which produce more leaves above the ear, with leaf area indices similar to conventional hybrids, which require fewer corn heat units to flowering and maturity, and tolerate higher population densities, should be better adapted for production in short season areas than currently available hybrids. Leafy reduced-stature maize hybrids, which have only recently been developed, have traits which address these criteria. The objective of this study was to evaluate the effects of different population densities (50 000, 100 000, 150 000, and 200 000 plants.ha⁻¹) on the vegetative growth of one leafy reduced-stature (LRS), one non-leafy reduced-stature (NLRS), and two conventional control hybrids (Pioneer 3979, < 2500 CHU, and Pioneer 3902, 2600–2700 CHU) at two locations. There were no differences among population densities for leaf number above the ear; however leaf area index increased as population density increased for all hybrids. The LRS hybrid had a greater average leaf number above the ear (2.7 and 2.0 more leaves than NLRS and the control hybrids, respectively). As a result the leaf area index value of LRS was much greater than the NLRS and similar to the conventional hybrids, but LRS matured substantially before the conventional hybrids. The LRS hybrid required fewer corn heat units to reach flowering and maturity and had more time for grain filling than the conventional hybrids. Therefore, LRS hybrids show promise for production in short season areas where maize cultivation is not economical due to shortness of growing season.  相似文献   

Serotypes of Pasteurella haemolytica and Pasteurella trehalosi isolated from farm animals in Hungary.     

L Fodor  J Varga  I Hajtós  T Molnár 《Zentralblatt für Veterin?rmedizin. Reihe B. Journal of veterinary medicine. Series B》1999,46(4):241-247

The biochemical and serological characteristics of 486 P. haemolytica and 31 P. trehalosi strains (517 in total) isolated from different lesions of cattle, sheep, goats, pigs and poultry were examined. A total of 476 P. haemolytica strains (97.9%) showed the characteristics typical of the former biotype A of P. haemolytica, while 10 isolates (2.1%), all from poultry, could not be biotyped. A total of 481 strains (93.0%) could be assigned to one of the 17 serotypes of P. haemolytica-P. trehalosi and 36 strains (7.0%) could not. The majority (83.6%) of the cattle isolates were serotypes A1 and A2. Among strains isolated from sheep all serotypes of P. haemolytica could be identified with the exception of A14, but serotypes A1, A2, A6, A8 and A5 were the most frequent. The overwhelming majority (94%) of the caprine isolates were A2, other serotypes occurred only sporadically. The pig isolates, which could be isolated only very rarely, represented different serotypes, while none of the 10 strains isolated from poultry could be biotyped or serotyped.  相似文献