Antimicrobial susceptibility and serotypes of Actinobacillus (Haemophilus) pleuropneumoniae recovered from Missouri swine   总被引：4，自引：0，他引：4  

W H Fales  L G Morehouse  K R Mittal  C Bean-Knudsen  S L Nelson  L D Kintner  J R Turk  M A Turk  T P Brown  D P Shaw 《Journal of veterinary diagnostic investigation》1989,1(1):16-19

The antimicrobial susceptibility of 73 Actinobacillus (Haemophilus) pleuropneumoniae isolates from swine in Missouri was determined with a microdilution minimal inhibitory concentration test system. Serotyping was accomplished by means of co-agglutination. Serotype 1 (39/73) and serotype 5 (30/73) were commonly found, whereas serotype 7 (4/73) was infrequently encountered. Most isolates (MIC90) were found susceptible to ampicillin (amoxicillin), cephalothin, penicillin, erythromycin, gentamicin, and kanamycin. Marked resistance was found with oxytetracycline, tylosin, and sulfadimethoxine. The data indicate that use of ampicillin (amoxicillin) or penicillin may correlate well with the favorable outcome of treatment.  相似文献   

Fumonisin B1 concentrations in feeds from 45 confirmed equine leukoencephalomalacia cases   总被引：1，自引：0，他引：1  

P F Ross  L G Rice  J C Reagor  G D Osweiler  T M Wilson  H A Nelson  D L Owens  R D Plattner  K A Harlin  J L Richard 《Journal of veterinary diagnostic investigation》1991,3(3):238-241

During the fall of 1989 and winter of 1990, numerous reports of equine leukoencephalomalacia (ELEM) occurred from many regions of the United States. Typically, horses were consuming feed partially or entirely composed of corn and/or corn screenings. From October 1989 through May 1990, samples from 55 confirmed or suspected ELEM cases were received at the National Veterinary Services Laboratories, Ames, Iowa, for fumonisin B1 analysis. Samples from 9 cases in 1984-1985 were also obtained. Fumonisin B1, a mycotoxin produced by Fusarium moniliforme, causes ELEM, but little is known of naturally occurring toxic or safe levels in feeds. To determine what levels of fumonisin B1 in feeds are associated with ELEM, 45 selected cases were studied. The fumonisin B1 concentrations ranged from less than 1 ppm to 126 ppm, with the majority of the samples above 10 ppm. All types of feeds were included: corn, screenings, sweet feeds, and commercially pelleted rations. The length of exposure varied from 7 to greater than 35 days. Horse feed samples not associated with ELEM were also collected and analyzed. None of the nonproblem feed samples contained fumonisin B1 levels greater than 8 ppm.  相似文献   

Letter to the Editor     

A. M. R. Nelson 《The Journal of small animal practice》1972,13(3):159-160

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Seizures as a manifestation of primary hyperparathyroidism in a dog   总被引：1，自引：0，他引：1  

S L Ihle  R W Nelson  J R Cook 《Journal of the American Veterinary Medical Association》1988,192(1):71-72

Hypercalcemia caused by primary hyperparathyroidism was believed to be responsible for seizures in a dog. A diagnostic evaluation showed no primary causes of seizures. After surgical excision of the adenomatous parathyroid gland, phenobarbital treatment was discontinued, without recurrence of seizures.  相似文献   

Toxic reactions in cattle treated with systemic organophosphate insecticides.   总被引：1，自引：1，他引：0       下载免费PDF全文

D L Nelson 《The Canadian veterinary journal. La revue veterinaire canadienne》1970,11(3):62-64

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Digestibility of forages in vitro as affected by content of "silica"   总被引：2，自引：0，他引：2  

G S Smith  A B Nelson  E J Bogino 《Journal of animal science》1971,33(2):466-471

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Toxicity of larger-than-recommended doses of naphthalophos to cattle, sheep, and goats     

D L Nelson  R G White  J O Mozier  A D Allen 《American journal of veterinary research》1970,31(1):199-201

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Tests for migratory history of the New Zealand common smelt (Retropinna retropinna (Richardson)) using otolith isotopic composition     

T. G. Northcote  C. H. Hendy  C. S. Nelson  J. A. T. Boubee 《Ecology of Freshwater Fish》1992,1(1):61-72

Abstract– Stable oxygen and carbon isotopic analyses were made for water at 24 sites, mainly from the Waikato watershed (North Island, New Zealand), and for carbonate from fish sagittal otolith material at each of the sites, mainly from the common smelt ( Retropinna retropinna (Richardson)), to test their potential use in identification of resident and anadromous/migratory stocks suggested in an earlier pilot study. Results provide strong evidence that ¹⁸O is precipitated in otoliths close to isotopic equilibrium with rearing waters. The smelt rearing and residency waters examined have characteristic oxygen and carbon isotopic 'signatures', and the ¹⁸O composition of the smelt otoliths mirrors this within about 1%0, making it possible to use the technique for determining resident and/or migrant history of the fish. The ¹³C otolith composition, though usually tracking that of probable rearing and/or residency waters, has a larger and more variable offset, possibly of metabolic origin, making its use less reliable as a habitat signature.  相似文献   

Histochemical study of the anulus fibrosus in normal canine caudal cervical intervertebral discs     

M J Burke  W J Banks  A W Nelson  H B Seim 《Research in veterinary science》1986,40(1):18-23

A qualitative assessment of glycosaminoglycans (GAGs) in the non-chondrodystrophoid canine cervical anulus fibrosus was performed using the Alcian blue/critical electrolyte concentration staining technique. Estimates of GAG concentration were deduced for two groups of dogs (average age four and eight years) by determining the hyaluronic acid, chondroitin sulphates and keratan sulphate 'alcianophilic indices'. Keratan sulphate was the predominant GAG in the four-year-old group of dogs. The concentration of keratan sulphate was equal to that of chondroitin sulphates in the eight-year-old group and the total GAG concentration was decreased. This qualitative assessment indicated that the concentrations of keratan sulphate decreased and chondroitin sulphates increased between four and eight years of age. Similar conclusions have not been reported for anuli in the thoracic and lumbar regions of the canine spine.  相似文献   

Use of goose red blood cells for detection of infection with psittacine beak and feather disease virus by haemagglutination and haemagglutination inhibition     

N SEXTON  WJ PENHALE  SL PLANT  DA PASS 《Australian veterinary journal》1994,71(10):345-347

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