Detection of Haemobartonella felis (Candidatus Mycoplasma haemofelis) in Australia that is similar to the 'Ohio' strain     

Clark P  Foster SF  Spencer PB 《Australian veterinary journal》2002,80(11):703-704

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Acute febrile neutrophilic vasculitis of the skin of young Shar-Pei dogs     

Malik R  Foster SF  Martin P  Canfield PJ  Mason KV  Bosward KL  Gough A  Rippon G 《Australian veterinary journal》2002,80(4):200-206

Three young Shar-Pei dogs were presented for signs of an acute widespread dermatopathy associated with fever and malaise. Cutaneous lesions initially consisted of multifocal areas of skin discolouration (haemorrhagic papules, macules or plaques) or oedema, preferentially affecting the head and limbs. In some locations, pus-filled bullae were evident also. Cutaneous lesions exuded seropurulent liquid and, in time, usually progressed to full thickness necrosis and ulceration. Lesions were so widespread and severe that one of the dogs was euthanased because its owners could not afford the reconstructive surgery required to close the skin deficits left at the completion of otherwise successful therapy. Histological examination of representative biopsies showed neutrophilic dermatitis and vasculitis, which ultimately resulted in ischaemic necrosis of skin. Therapy with immunosuppressive doses of corticosteroids, and in one case cyclophosphamide, resulted in prompt amelioration of the underlying inflammatory process, although regions of skin deprived of their blood supply eventually became necrotic and sloughed. Healing occurred through granulation, contraction and epithelialisation. The physical findings in these three dogs were so similar that it is likely all suffered from the same breed-related syndrome, an immune-mediated vasculitis precipitated by some event, such as vaccination or an undetected infection. Whatever the inciting cause, it was most likely a one-off event, as the two surviving dogs were readily weaned off immunosuppressive medication without relapse.  相似文献   

Seasonal and annual changes in soil respiration in relation to soil temperature, water potential and trenching   总被引：2，自引：0，他引：2  

Lavigne MB  Foster RJ  Goodine G 《Tree physiology》2004,24(4):415-424

Soil respiration (rs), soil temperature (Ts) and volumetric soil water content were measured in a balsam fir (Abies balsamea (L.) Mill.) ecosystem from 1998 to 2001. Seasonal variation in root and microbial respiration, and covariation in abiotic factors confounded interpretation of the effects of Ts and soil water potential (Psis) on rs. To minimize the confounding effect of temperature, we analyzed the effect of Psis on rs during the summers of 1998-2000 when changes in Ts were slight. Soil respiration declined 25-50% in response to modest water stress (minimum Psis of -0.6 to -0.2 MPa), and between years, there was substantial variation in the relationship between rs and Psis. In the summer of 2000, 2-m2 plots were subjected to drought for 1 month and other plots were irrigated. The relationship between summertime rs and Psis in the experimental plots was similar to that estimated from the survey data obtained during the same summer. In late spring and early autumn of 2001, 2-m2 trenched and untrenched plots were subjected to drought or exposed to rainfall. It was dry in the early autumn and there was severe soil drying (Psis of -10 MPa in untrenched plots and -2 MPa in trenched plots). In spring, rs in untrenched plots responded more to modest water stress than rs in trenched plots, indicating that root respiration is more sensitive than microbial respiration to water stress at this time of year. The response to abiotic factors differed significantly between spring and autumn in untrenched plots but not in trenched plots, indicating that root activity was greater in early autumn than in late spring, and that roots acclimated to the sustained, severe water stress experienced before and during the autumn.  相似文献   

Molecular cloning and phylogenetic analysis of a cDNA encoding the cat (Felis domesticus) Ig epsilon constant region     

Weber ER  Helps CR  Foster AP  Perry AC  Gruffydd-Jones TJ  Hall L  Harbour DA  Duffus WP 《Veterinary immunology and immunopathology》2000,76(3-4):299-308

A feline splenic cDNA library was screened with a (32)P-labelled cDNA probe encoding the canine IgE epsilon heavy chain subunit. A cDNA sequence of 1614 nucleotides encoding the complete feline IgE heavy chain, as well as a portion of a variable region, was identified. A search of the GenBank database revealed an identity of 82% at the nucleotide level and 76% at the amino acid level between the feline epsilon heavy chain sequence and the canine homologue. In a separate study, feline genomic DNA, isolated from whole feline embryo cells, was subjected to PCR amplification using primers based on known partial genomic DNA sequences for the feline C epsilon gene. Following removal of an intron from the 683 bp PCR product, the coding sequence yielded an ORF of 506 bp. The DNA sequence of this PCR clone differed by a single nucleotide from the cDNA clone. This difference is silent, and therefore the proteins encoded by the two sequences are identical over the regions cloned and sequenced. Phylogenetic analysis of the constant regions of nine immunoglobulin epsilon genes revealed that the feline cDNA is most similar to the canine homologue.  相似文献   

Some aspects of fluid therapy in practice     

S J Foster 《The Journal of small animal practice》1970,11(5):337-357

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Isolation,characterization and protection studies in mice of a streptomycin-dependent mutant ofStreptococcus suis type 1/2     

N. Foster  J. J. Staats  M. M. Chengappa 《Veterinary research communications》1994,18(3):155-163

An avirulent, streptomycin-dependent (Str-D) mutant ofStreptococcus suis type 1/2 was produced and characterized by its antimicrobial susceptibility, growth kinetics, biochemical reactions and reversion rate. Homologous and heterologous vaccine trials in mice resulted in complete protection against challenge withS. suis types 1 and 1/2 and partial protection against challenge withS. suis type 2.Abbreviations Str-D streptomycin-dependent - CFU colony-forming units - PBS phosphate-buffered saline - IP intraperitoneal - LD₅₀ the dose that results in 50% mortality  相似文献   

Reproductive capacity of beef bulls. V. Fertility and freezability of successive ejaculates collected by different methods     

R C Martig  J O Almquist  J Foster 《Journal of animal science》1970,30(1):60-62

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Market stress-associated changes in serum complement activity in feeder calves.     

C W Purdy  A B Richards  G S Foster 《American journal of veterinary research》1991,52(11):1842-1847

Classical hemolytic complement (C) of calves was analyzed during a protocol designed to imitate the usual market handling of feeder calves from the southeastern United States. Serum C concentrations of the calves (n = 100 x 4 years) were evaluated on their farm of origin, on arrival at an auction market, on arrival at a feedyard, and during their first 4 weeks in the feedyard. Complement concentrations (measured in CH50 units) were typically lowest at the farm of origin and highest when the calves entered the auction market 28 to 133 days later. Serum C concentrations decreased after the calves encountered the severe stresses of being in the auction market for 7 days, 24-hour truck transport (1,932 km) to the feedyard, and the first 7 days in the feedyard. The C concentrations recovered after 21 to 28 days in the feedyard. Steers had significantly (P less than or equal to 0.05) lower C concentrations than did heifers in 3 of 4 years at the farm of origin, and in 2 of 4 years at the auction market. Morbid calves had significantly (P less than or equal to 0.05) lower C values than did healthy calves on day 7 in the feedyard in 3 of 4 years. There were significant differences in C concentrations of calves from different farms of origin in each of the 4 years. There was no significant difference in C concentrations of calves that were vaccinated vs those not vaccinated with Pasteurella haemolytica.  相似文献   

Successful treatment of a tarsocrural joint luxation in a pony     

JA LAING  SF CAVES  RJ RAWLINSON 《Australian veterinary journal》1992,69(8):200-201

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Effect of oral L-carnitine on its concentration in the plasma of yearling Thoroughbred horses     

C V Foster  R C Harris  E J Pouret 《The Veterinary record》1989,125(6):125-128

After an oral dose of 10 g of L-carnitine the plasma concentrations of free and total carnitine increased in five yearling thoroughbred horses, reaching a peak two to four hours after administration, but in two horses there was no increase. In the five which responded, the mean (+/- sd) peak increase in total carnitine concentration was 15.1 +/- 6.9 mumol/litre from a predose mean of 18.8 +/- 3.4 mumol/litre, and the mean peak increase in free carnitine concentration was 13.5 +/- 3.1 mumol/litre from a pre-dose mean concentration of 12.5 +/- 2.2 mumol/litre. These changes were similar to those observed previously in a group of adult thoroughbred horses given 10 g of L-carnitine. There was no consistent pattern of change in the concentration of acetylcarnitine in the seven yearling horses.  相似文献