Efficacy of an in-feed ivermectin formulation against gastrointestinal helminths, lungworms, and sarcoptic mites in swine   总被引：1，自引：0，他引：1  

R Alva-Valdes  D H Wallace  A G Foster  G F Ericsson  J W Wooden 《American journal of veterinary research》1989,50(8):1392-1395

The efficacy of ivermectin as an in-feed formulation was evaluated against naturally acquired gastrointestinal helminths, lungworms, and sarcoptic mites (experiment 1; n = 24) and against induced infection with intestinal nematodes (experiment 2; n = 24) in pigs. Treatments consisted of ivermectin administered in feed at concentrations calculated to provide 100 or 200 micrograms/kg of body weight/d for 7 days or of nonmedicated feed (controls) for 7 days. At concentration of 100 micrograms of ivermectin/kg/d, efficacy against naturally acquired infections was 97.7% for Ascaris suum, 97.8% for Metastrongylus spp, greater than 99% for Oesophagostomum spp, 100% for Macracanthorhynchus hirudinaceus, and 89.7% for Ascarops strongylina. Against induced infections (fourth-stage larvae), efficacy was 100% for A suum and 96.9% for Oesophagostomum spp. At concentration of 200 micrograms of ivermectin/kg/d, efficacy against naturally acquired infections was 100% for A suum, Hyostrongylus rubidus, Metastrongylus spp, and Ascarops strongylina; greater than 99% for Oesophagostomum spp; and 85.9% for Macracanthorhynchus hirudinaceus. Against induced infections (fourth-stage larvae), efficacy was 100% for A suum and 95% for Oesophagostomum spp. At concentrations of 100 and 200 micrograms of ivermectin/kg/d, efficacy against Sarcoptes scabiei var suis was evidenced by elimination of the mite by posttreatment day 14.  相似文献   

The relative importance of traits reported in the first three gosford random sample tests     

W. H. Foster 《British poultry science》1967,8(3):201-207

An analysis was performed on the published results of the first, second and third Gosford Random Sample Tests to determine which of the various biological traits reported had the greatest influence upon the overall ranking. Ten traits were considered. It was found that regression on survivors’ average egg production and laying house mortality removed 88.1 per cent of the variation in financial return. The addition of average egg weight and daily food consumption increased this figure to 93.3 per cent. The remaining traits, number of unsaleable birds at 500 days, body weight at 500 days, age at 50 per cent production, blood spots, meat spots and shell thickness, did not produce significant reductions except in so far as they were correlated with those previously mentioned.

The financial returns expected from improvements in the four important traits were:

• Per bird

• + 12 in survivors egg production 2S. 4¼d. ± 1¼d.

• —5 in percentage laying mortality is. 5d.± 1d.

• + 1 g. in average egg weight 10½d. + 1 ½d.

• —5 g. in food consumed per day 43/4d.± 1¼d.

Laying house mortality was found to be positively correlated among the entries with survivors’ average egg production and with average egg weight.  相似文献   

Suspected jute seed (Corchorus olitorius) poisoning of cattle     

RA McKENZIE  RB CALLINAN  DB UNGER  MA FLANAGAN 《Australian veterinary journal》1992,69(5):117-118

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Observations on a foraging association between two freshwater stream fishes     

J. A. Baker  S. A. Foster 《Ecology of Freshwater Fish》1994,3(3):137-139

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Prickly paddy melon (Cucumis myriocarpus) poisoning of cattle     

RA McKENZIE  RD NEWMAN †  AC RAYNER †  PJ DUNSTER 《Australian veterinary journal》1988,65(6):167-170

Twenty-six Hereford heifers died after eating mostly ripe fruit of Cucumis myriocarpus growing in a fallowed cultivation paddock. Four affected cattle were dehydrated and apparently had abdominal pain. Necropsy of three revealed intense congestion with haemorrhage of the alimentary tract, numerous C. myriocarpus seeds in ruminal contents, pulmonary congestion and oedema and, in two, swollen livers. Midzonal swelling and vacuolation of hepatocytes occurred in these two. C. myriocarpus fruit (83% by weight ripe) were dosed to two calves at 60 g wet weight/kg live weight. Both collapsed with tachycardia and dyspnoea and died within 6 h. Their packed cell volumes just before death had increased to 0.7. They had hydropic degeneration and necrosis of the ruminal mucosa, intense congestion and oedema of the rumen, abomasum and intestines, swollen and vacuolated hepatocytes and foci of myocardial degeneration and necrosis. Two other calves were dosed daily with 20 g fruit/kg for three days, then 40 g/kg for three days. One calf received a further 40 g/kg next day. Both calves developed persistent diarrhoea and neutrophilia, and their plasma gamma glutamyltransferase and bilirubin concentrations increased. Necropsy revealed necrosis and oedema of the rumen and swollen degenerate hepatocytes.  相似文献   

Book review     

W. H. Foster 《British poultry science》1980,21(4)

Commercial Chicken Production Manual, 2nd edition, by Mack, O. North. Avi Publishing Co., Inc., Westport, Conn., USA, 1978. 692 pp. Price $42.50.  相似文献   

Direct assay for bluetongue virus by intravascular inoculation of embryonating chicken eggs   总被引：5，自引：0，他引：5  

N M Foster  A J Leudke 《American journal of veterinary research》1968,29(3):749-753

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Feline immunodeficiency virus vaccine issues     

Beatty JA  Barrs VR  O'Brien CR  Foster SF  Foster DJ  Litster AL  Malik R 《Australian veterinary journal》2005,83(1-2):53-53

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Declawing the domestic cat: the technique of onychectomy     

S J Foster  N G Fowler 《The Veterinary record》1971,88(3):68-72

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The effect of light‐dark cycles of abnormal lengths upon egg production     

W. H. Foster 《British poultry science》1968,9(3):273-284

An experiment is described conducted on approximately 1000 pullets from six different strains over a period of almost one year. The three treatments used were cycles of 23, 24 and 25 hr composed of 15 light:8 dark, 15 light:9 dark and 15¼ light:9¾ dark. Egg production increased significantly (P <0.01) with increasing cycle length, the mean rates of lay, expressed as eggs per 100 birds per 24 hr, being 71.6, 72.9 and 73.8 for the 23‐, 24‐ and 25‐hr cycles respectively.

The relative effects of the treatments were found to remain unaltered throughout the experiment.  相似文献