摘要:

The role of prolactin and LH in the control of the function of the corpus luteum in the dog was studied. Experiments were performed to interfere with the secretion of a) prolactin by administering a dopamine agonist and b) LH by desensitisation with a long‐acting LHRH and by stimulation.

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694266

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

The major histocompatibility complex (MHC) of mammals number of mostly duplicated contains a large genes. In the HLA system (the MHC of man), which is by far the best‐studied major histocompatibility system so far, roughly 20 genes have been defined and mapped. They code for three classes of proteins: HLA‐A, ‐B and ‐C (Class I), HLA‐DP, ‐DQ and ‐DR (Class II) and serum complement components C2, C4 and Bf (Class III). Furthermore, the region contains genes for 21‐hydroxylase (21‐OH) and tumor necrosis factor (TNF).

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694267

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

Thein vitroactivity of flumequine in comparison with several other drugs was tested against 17P. multocida, 16P. haemolytica, 21S. dublin, 21S. typhimuriumand 21E. colistrains, isolated in (veal) calves in the Netherlands.

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694268

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

Over a period of six months, approximately 4700 blood samples were collected from 97 pig‐finishing farms in the provinces of Noord‐Brabant and Gelderland and screened for antibodies with respect to Aujeszky's disease virus (ADV), porcine influenza virus (PI) andActinobacillus(Haemophilus)pleuropneumoniae(App). There were significant differences in the percentages of seropositive pigs between the two provinces, which may be related to the difference in the density of the pig population in the two provinces.

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694269

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

Calves (n = 2) born to dams with experimentally induced brucellosis, and calves (n = 4) born to dams with naturally occurring infection were examined by the delayed‐type hypersensitivity (DTH) test for possibleB. abortusinfection. The results were compared with the serum agglutination test, complement fixation test, and Coombs test. Five calves were nursed by their dams for 8–10 weeks after birth. One calf was separated from its dam and fed artificial milk.

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694270

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

A two‐year‐old male Barsoi dog was presented after a two‐week period of muscle twitching and convulsions during exercise, which worsened to a state of tetraparesis and coma. Removal of a gastric foreign body, containing aluminium, resolved the presenting signs. Parallel with this clinical recovery the elevated serum levels of aluminium decreased to values of two normal control dogs, suggesting that the neurological signs were due to A1 intoxication.

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694271

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

Netobimin was tested for efficacy against Haemonchus contortus using 7 groups of 5 parasite‐free lambs of six month age. The lambs in group 1 and 2 were infected with 10,000 larvae of a benzimidazole susceptible strain and those in groups 3–7 with the same dose of a resistant strain. The following treatment scheme was applied 21 days after infection: lambs in groups 2 and 4 ‐ 7.5 mg kg‐1netobimin, in group 5 ‐ 20 mg kg‐1netobimin, in group 6 ‐ 5 mg kg‐1oxfendazole and in group 7 ‐ 3.8 mg kg‐1albendazole. The lambs in groups 1 and 3 remained untreated. All lambs were slaughtered 28 days after infection. Egg counts decreased in all lambs after treatment, but increased again in lambs in groups 4, 6 and 7. There was a slight increase in lambs in group 5, while those in group 2 remained negative. Post‐mortem worm counts showed a reduction of 99.8 per cent in lambs in group 2 compared to those in group 1. In lambs in group 4–7 the reduction of worm counts was respectively 40.9, 89.5, 24.7 and 40.7 per cent compared to those in group 3. Egg development assays carried out 20 days after infection showed an average LD50of 0.46 mg ml‐1thiabendazole for the resistant strain. After treatment (day 27) the LD50was 0.53, 0.48, 0.58, 0.56 and 0.47 in lambs in the groups 3–7. It is concluded that netobimin and other (pro) ‐benzimidazoles should not be used in cases of benzimidazole resistance and that levamisole, pyrantel tartrate or ivermectin are preferable.

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694272

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

The presence of 17β‐19‐nortestosterone (nandrolone, NT, 17β‐19‐NT) and its epimer 17α‐19‐nortestosterone (epiNT, 17α‐19‐NT) was investigated in the urine of six untreated boars, obtained from experimental farms. The presence of 17β‐19‐nortestosterone was screened by RIA and HPTLC and confirmed by GC‐MS analysis. Additionally, the two epimers (NT and epiNT) were investigated in the urine of a boar (two‐year‐old miniature male pig weighing 50 kg) before and after injection of 100 mg Laurabolin®(nortestosterone laurate, Intervet N.V, Belgium).

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694273

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

Direct diagnosis of swine influenza infection by an indirect immunofluorescence technique using anti‐nucleoproteine monoclonal antibody was compared with virus isolation. Five 8‐week‐old pigs were inoculated with 2 × 107 EID50of strain A H1N1Sww//4115/85. Clinical signs developed in only three pigs. Antigen was detected in nasal epithelial cells obtained from all animals the first day after inoculation; the antigen was detected in one pig 6 days after the infection. Fluorescence was present in the nucleus, nucleolus and cytoplasm of infected cells. The indirect immunofluorescence test was specific and as sensitive as virus isolation in embryonated eggs, allowing a rapid diagnosis that could be achieved within hours.

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694274

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694275

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor