The association between pupil sizes and blood constituents in cows with parturient paresis          下载免费PDF全文

Fenwick DC 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(5):426-429

  相似文献   

Rapeseed meal and egg taint: Treatment of rapeseed meal to reduce tainting potential     

G. R. Fenwick  A. Hobson‐Frohock  D. G. Land  R.F. Curtis 《British poultry science》1979,20(3):323-329

1. Treatment of rapeseed meal with calcium hydroxide suspension decreased the sinapine content by up to 90%. Smaller decreases were obtained by autolysis, steaming and treatment with ammonia.

2. When this treated meal was fed to susceptible ("tainting") hens the concentration of trimethylamine in the eggs was decreased to much less than that required to cause taint.  相似文献   

Rapeseed Meal and egg taint     

A. Hobson‐Frohock  R. G. Fenwick  D. G. Land  R. F. Curtis  A. L. Gulliver 《British poultry science》1975,16(2):219-222

1. Certain rapeseed meals in the diet of hens laying brown eggs result in the production, from some birds, of eggs which have a “ fishy ” or “ crabby ” odour because of the presence of trimethylamine.

2. Such susceptible birds have been used to demonstrate that the activity can be extracted from rapeseed meal with appropriate solvents.  相似文献   

BOOK REVIEW     

SG Fenwick 《Australian veterinary journal》2004,82(4):241-241

  相似文献   

First Detection of Ehrlichia canis in Cerebrospinal Fluid From a Nonthrombocytopenic Dog with Meningoencephalitis By Broad‐Range PCR          下载免费PDF全文

G. Kaewmongkol  P. Maneesaay  N. Suwanna  B. Tiraphut  T. Krajarngjang  A. Chouybumrung  S. Kaewmongkol  T. Sirinarumitr  S. Jittapalapong  S.G. Fenwick 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2016,30(1):255-259

  相似文献   

Changes in the glucosinolate content of oilseed rape plants following infection with turnip mosaic virus     

J. pak  J. Lewis  G. R. Fenwick 《Physiological and Molecular Plant Pathology》1993,43(6)

Low and high glucosinolate cultivars of oilseed rape were analysed for variation in both individual and total glucosinolate content up to 27 days after inoculation with turnip mosaic virus. Both infected and control plants of the two cultivars differed in the concentration of aliphatic, aromatic and indole glucosinolates. The biggest differences in glucosinolate content between the cultivars were found in the aliphatic and aromatic glucosinolate groups. Infected plants of the high glucosinolate cultivar, Solida, possessed lower amounts of glucosinolates, than did healthy control plants. Similar results were obtained with a low glucosinolate cultivar, S1. No significant difference was found between the two cultivars in resistance to turnip mosaic virus, using qualitative and quantitative ELISA to determine virus content in their tissues.  相似文献   

Salmonella Brandenburg--emergence of a variant strain on a sheep farm in the South Island of New Zealand     

Clark RG  Swanney S  Nicol CM  Leyland M  Fenwick SG 《New Zealand veterinary journal》2003,51(3):146-147

Salmonella Brandenburg was initially diagnosed in New Zealand in an aborted ewe from a Merino flock in mid-Canterbury in1996. The following year, the disease occurred on farms in mid-Canterbury and on one farm near Winton in Southland (Bailey1997). Since then, this bacterium has caused widespread abortion and deaths in pregnant ewes in Southland, coastal Otago and south- and mid-Canterbury. In cattle, the same organism has caused diarrhoea and dysentery in calves and adult cattle, and abortions and deaths in first-calving cows and, to a lesser extent, in second-calving and older cows. Salmonella Brandenburg has also caused diarrhoea and fetal deaths in dogs, and diarrhoea and deaths in foals. The outbreak strain has been extensively studied using pulsed-field gel electrophoresis (PFGE). All isolates tested to date have had an indistinguishable molecular pattern with the exception of a single isolate from a sheep-yard dust sample recovered in October 2000 that is the subject of this report. The molecular pattern of the variant strain differed from that of the epidemic strain by the absence of one high molecular weight band and the addition of three lower molecular weight bands.  相似文献   

Circulating cortisol, tumor necrosis factor-alpha interleukin-1beta, and interferon-gamma in pigs infected with Actinobacillus pleuropneumoniae     

Balaji R  Wright KJ  Turner JL  Hill CM  Dritz SS  Fenwick B  Carroll JA  Zannelli ME  Beausang LA  Minton JE 《Journal of animal science》2002,80(1):202-207

This study evaluated the time course of systemic cytokine concentrations in an acute model of pneumonia in pigs challenged intranasally with Actinobacillus pleuropneumoniae. Feed intake and serum cortisol were measured as overt clinical and systemic markers of disease onset, respectively, and serum tumor necrosis factor-alpha, interleukin-1beta, and interferon-gamma as representative systemic inflammatory markers. Crossbred barrows (n = 15), approximately 5 wk of age, were used in the study. Pigs were housed in an environmentally controlled facility at 25 degrees C and under continuous illumination in pens measuring approximately 1.5 m2. Pigs had free access to water and an unmedicated diet. Approximately 1 wk prior to disease challenge, pigs were fitted nonsurgically with venous catheters. At challenge, pigs were given 5 x 10(8) CFU Actinobacillus pleuropneumoniae intranasally (n = 8) or a similar volume of sterile growth media intranasally (Control; n = 7). Feed intake was estimated by the change in feeder weight at 12-h intervals from -12 to 72 h relative to the time of disease challenge. Blood sampling began 12 h prior to challenge and continued until 72 h after challenge. Pigs were sampled at -12, -6, and 0 h, then at 90-min intervals until 12-h post-challenge, continuing at 3-h intervals until 24-h post-challenge, then again at 6-h intervals until 72 h after challenge. Serum was harvested and frozen until assayed for cortisol, tumor necrosis factor-alpha, interleukin-1beta, and interferon-gamma. Feed intake was reduced in Actinobacillus pleuropneumoniae pigs during the intervals 0 to 12 h (P < 0.001), 24 to 36 h (P < 0.001), 48 to 60 h (P <0.05), and 60 to 72 h (P < 0.05). TheActnobacillus pleuropneumoniae-challenged pigs had elevated serum cortisol from 180-min to 18-h post-challenge (P < 0.001) and also at 36 (P < 0.05), 42 (P < 0.001), and 60 (P < 0.05) h following infection. Circulating cytokines were not affected by disease challenge. Thus, in this experimental model of pneumonia, weaned pigs demonstrated expected behavioral and endocrine characteristics of disease in the absence of significant changes in circulating inflammatory cytokines.  相似文献   

An epidemic of salmonellosis caused by Salmonella Typhimurium DT160 in wild birds and humans in New Zealand     

Alley MR  Connolly JH  Fenwick SG  Mackereth GF  Leyland MJ  Rogers LE  Haycock M  Nicol C  Reed CE 《New Zealand veterinary journal》2002,50(5):170-176

AIM: This study reports an outbreak of salmonellosis due to S. Typhimurium DT160 which caused extensive mortality in wild birds and enteric disease in humans in New Zealand during the winter and spring months of the year 2000. METHODS: Necropsies were performed and microbiological examinations undertaken on wild birds from populations in which mass mortality was reported, and on captive indigenous birds which died suddenly during the winter and spring of 2000. Affected tissues were examined histologically and isolates of S. Typhimurium were phage typed and examined using pulsedfield gel electrophoresis (PFGE). Isolates of S. Typhimurium obtained from cases of human enteric disease which occurred during these months were phage typed, examined using PFGE and compared with the bird isolates. RESULTS: Central and northern areas of the South Island and the southern North Island were worst affected with die-offs of several hundreds of sparrows and other birds reported in rural areas. Mortalities reached a peak in winter (July-August) 2000 and decreased to small numbers during the spring and early summer. The birds usually died of an acute septicaemia with multifocal necrotising lesions in the liver and spleen. Human cases throughout the country increased gradually over the same period. Isolates from birds, livestock and humans examined using PFGE were indistinguishable from one another. CONCLUSION: This strain of Salmonellahas emerged as a major cause of septicaemia in wild birds in New Zealand. Because of the close association between house sparrows (Passer domesticus) and humans, the organism also poses a serious zoonotic risk. The possibility that the infection may spread to involve indigenous species needs investigation.  相似文献   

Genomic typing of Streptococcus uberis isolates from cases of mastitis, in New Zealand dairy cows, using pulsed-field gel electrophoresis     

Douglas VL  Fenwick SG  Pfeiffer DU  Williamson NB  Holmes CW 《Veterinary microbiology》2000,75(1):27-41

Three hundred and forty-two Streptococcus uberis isolates were cultured from milk samples from subclinical and clinical cases of dairy cattle mastitis. The samples were collected from 15 different New Zealand farming regions, including eight specific farms, during field research trials and veterinary diagnostic investigations. Pulsed-field gel electrophoresis was used to determine and compare the degree of genetic dissimilarity between the restriction endonuclease fragment pattern of the 342 New Zealand and a single United States S. uberis isolate. The 343 isolates exhibited 330 different restriction endonuclease fragment patterns. The United States isolate had a pattern unlike any of the New Zealand isolates. Most of the isolates were genetically different strains (pattern deferred by at least 33%), but identical patterns were noted within the same or different quarters of an individual cow, different cows within the same farm, and from different cows from the same or different districts, farming regions or islands. Seven of the eight selected farms had at most only one pair of isolates with banding patterns, which differed by less than 33%. A high degree of dissimilarity was noted in individual herds in which all the samples were collected on the same day or over a 2-year period. The high degree of dissimilar isolates is an indication that S. uberis infections in New Zealand dairy cattle are largely due to the opportunistic nature of the organism in the cows' environment. Prevention and treatment of S. uberis mastitis will therefore need to be directed at a multitude of different strains present throughout the country as well as in individual herds.  相似文献