ISSN:0165-2176    

DOI:10.1080/01652176.1981.9693808

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

The effect of 60 minutes’ intravenous infusions, before morning feeding, of ammonium acetate (18.6 micromole/min/kg of body weight) and ammonium acetate with propranolol (11 μg/min/kg of body weight) on the ruminal motility of sheep was examined. Ammonia has an adrenaline‐like action therefore propranolol, a beta‐receptor blocking agent, was administered in order to eliminate the possible effect of adrenaline on ruminal motility. The contractions of the dorsal sack of the rumen were registered by means of the balloon method, with the gauge inserted through the rumen fistula. The infusion of ammonium acetate caused an increase of the ammonia concentration in the blood to 0.6 mmolel/at the end of 60 minutes’ infusion. Already during the first 5 minutes of the intravenous infusion of ammonium acetate there was a decreased frequency of ruminal contractions, which was observed throughout the infusion. After the infusion there was a radical decrease of the concentration of ammonia in the blood, and at the same time an increase in the frequency of rumen contraction was observed.

ISSN:0165-2176    

DOI:10.1080/01652176.1981.9693809

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

A comparative study was undertaken regarding the extractability of glucosaminoglycans and mucoproteins in the tendon tissue of birds highly susceptible to synovitis, viz. broiler breed cocks (BB cocks), and of birds highly resistant to synovitis, viz. White Leghorn hens (WL hens).

ISSN:0165-2176    

DOI:10.1080/01652176.1981.9693810

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

Eight dogs, given imidocarb dipropionate subcutaneously at a dose of 6 mg/kg, were challenged with a sporozoite stabilate of a French strain of Babesia canis, prepared from infected Dermacentor reticulatus ticks, 2, 3, 4 or 5 weeks after treatment. Three control dogs were similarly infected but not preventively treated. One of the controls and one of the dogs treated 5 weeks prior to challenge died of babesiosis. Prepatent and incubation periods were similar in treated and control dogs, and all dogs showed important reductions in the packed cell volume. Relaps'es were commonly seen after recovery from the initial reaction. Although further work is needed before a final conclusion can be drawn to whether imidocarb is suitable as a chemoprophylactic against B. canis infection, it can be used as a curative drug.

ISSN:0165-2176    

DOI:10.1080/01652176.1981.9693811

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

The effect of spray washers and inside‐and‐outside bird washers on the microbiological quality of broiler carcasses was examined in 13 poultry slaughterhouses. The carcasses were sampled by means of the carcass rinse method; total and Enterobacteriaceae counts were estimated. The decrease in total and Enterobacteriaceae counts due to spray washing was as high as with the use of an inside‐and‐outside bird washer. From this investigation the conclusion can be drawn that the use of an inside‐and‐outside bird washer does not guarantee a better microbiological cleaning of the inside of the carcasses made ‘mandatory’ by EEC regulations.

ISSN:0165-2176    

DOI:10.1080/01652176.1981.9693812

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

A two‐month‐old female foal with duodenal stenosis is described. The foal was in poor condition and showed an abnormal stable behaviour. She stood preferably with her head stretched out and reposing on the mare's back or on the stable ridge. Salivation was an important symptom.

ISSN:0165-2176    

DOI:10.1080/01652176.1981.9693813

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

The sensitivity of microbiological assay methods for sulfonamides in muscle, kidney, serum, and milk was improved with Standard II Nähragar (Merck 7883), the medium being supplemented with trimethoprim, 1% sodium chloride, and 0.4% dextrose. The agar was seeded with 104spores of Bacillus subtilis BGA per ml medium. The trimethoprim concentrations per ml agar were, at pH 6.20, pH 7.0, and pH 8.0, respectively 0.30, 0.15 and 0.07 μg.

ISSN:0165-2176    

DOI:10.1080/01652176.1981.9693814

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

Investigations regarding the detection of Babesia bovis infections in Boophilus geigyi revealed that:a.By the egg crushing method, Babesia bovis infection in ticks is detected from the 5th day onward and up to the 22nd or 24th day before disappearing.b.By means of haemolymph puncture, infection could only be noticed from the 5th or 6th day up to the 14th day.c.Babesia bovis infection can be easily detected from days 1–4 in the larvae of ‘infected’ ticks. ‘Uninfected’ ticks which show negative egg infection have been found to produce infected larvae up to day 2, even though the percentage is comparatively low.

ISSN:0165-2176    

DOI:10.1080/01652176.1981.9693815

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

An unusual finding of Besnoitia besnoiti was discovered during histopathological examination of the adrenal gland of a cow brought to slaughter.

ISSN:0165-2176    

DOI:10.1080/01652176.1981.9693816

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

Serological examinations demonstrated that Egg Drop Syndrome 1976 (EDS'76) virus infection was of no significance in the Dutch poultry industry in 1980, in contrast to the situation in 1976–1978 when this infection was of widespread occurrence.

ISSN:0165-2176    

DOI:10.1080/01652176.1981.9693817

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor