摘要:

After intramuscular (IM) administration (dose 20 mg/kg) of three 20% (Terramycin®/LA (product A), Alamycin® LA (product B) and Terralon 20% LA (product C)) and two 10% oxytetracycline (OTC) formulations (Engemycin® 10% (product D) and Oxyject® 10% (product E)), to calves, pigs and sheep, the .OTC residue concentrations were determined in organs, muscle, fat, plasma, urine and at the injection sites at 10 days post injection (p.i.). At that time the irritation at the injection site was studied, too. The three 20%‐formulations (products A, B, C) and one 10%‐formulation (product E) induced considerable local irritation in and between the muscles. This was most pronounced in calves and pigs; in sheep the extent of irritation was limited. Ten days after administration of formulations A, B, C and E, OTC residues were found in organs and the OTC recovery at the injection sites varied widely among the three species. Following IM injection of product D minimal tissue irritation and no OTC residues could be detected at the injection site at 10 days p.i. The differences in local tissue irritation and the residue state of the carcass (including injection site) are related to the various solvent systems used in the formulations.

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694257

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

A flock of broiler parents was hyperimmunised against Newcastle disease (ND) by subcutaneous injection of an experimental high‐potency inactivated oil emulsion (IOE) vaccine in order to achieve high and long‐lasting passive protection in broilers. During the egg production period mean log2HI ND titre of the parents slowly decreased from 11.6 at 26 weeks of age to 10.0 at 53 weeks of age. Titres of day‐old progeny paralleled those of their parents. Mean protection of broilers against mortality following challenge with Herts 33 virus at the ages of 1, 2, 3 and 4 weeks was 86%, 73%, 54% and 44%, respectively.

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694258

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

Blood values of slaughtered pigs were determined in an attempt to relate the blood profile with the prevalence of abscesses. To this end 319 pigs were selected and grouped into classes on the basis of pathological ante‐ and post‐mortem findings. The classes thus distinguished were (i) no pathology, (ii) pleurisy or pneumonia and (iii) abscesses occurring singly, metastasised or in combination with other abnormalities.

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694259

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

A macroscopic description of four hearts showing three arterial ostia in the base of the pig's heart was carried out. Portions of the vascular walls were histologically examined in three hearts. All hearts belong to the Tetralogy of Fallot group.

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694260

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

In 40 canine patients with spontaneous atrial fibrillation (AF) cardiac performance was measured scintigraphically and correlated with the survival time (ST) following the diagnosis of AF.

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694261

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

The pharmacokinetics of chloramphenicol were studied in sheep after 3 single intravenous (IV), intramuscular (IM) and subcutaneous (SC) administrations (30 mg/kg). The two extravascular routes were studied during a crossover trial for a bioequivalence test. After IV and SC administrations, the plasma‐concentration time graphs were characteristic of a two‐compartment model, and after IM administration it was chracteristic of a monocompartment model. The two routes of absorption were not bioequivalent.

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694262

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

Thein vitrolymphoproliferative assay specific for bovine herpes virus type 1 (BHV1) was tested for its ability to predict whether an animal was protected against challenge with virulent BHV1 and for its ability to identify animals latently infected with the virus. Three animals that had been in contact with a field strain of the virus, three that had been vaccinated with a modified live‐virus vaccine seven weeks previously, six that had been vaccinated in the same way five months previously, and seven control animals that had had no previous contact with the virus were challenged with virulent BHV1. The 12 animals that had had previous contact with BHV1 all resisted the challenge well or fairly well, but six of them did not react positively in thein vitrolymphoproliferative assay. It was concluded that the assay did not give consistent evidence of the immune status of the animals. Four animals that had had previous contact with a field strain of BHV1 were treated with dexamethasone; they excreted BHV1 irrespective of whether they showed a positive response in thein vitrolymphoproliferative assay.

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694263

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

(1) The efficacy of toltrazuril (Baycox®) against coccidiosis was established on a broiler farm in an intermittent application during five consecutive growing periods. Treated birds were fed a broiler ration without anticoccidials. The efficacy of Baycox® was compared with the nicarbazin‐salinomycin shuttle. It was concluded that Baycox® retarded the onset ofEimeriainfection for several weeks. During the fifth rearing period coccidiosis problems emerged on the farm in all birds during medication, suggesting development of resistance. (2) During a laboratory experiment the efficacy of Baycox® was studied in birds after inoculation with different numbers of oocysts at 7, 10 or 15 days of age. Baycox® was applied at 10 and 11 days of age.

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694264

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

ISSN:0165-2176    

DOI:10.1080/01652176.1990.9694256

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor