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New Zealand Veterinary Journal

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October 26, 2016: New Zealand Veterinary Journal
J S Munday, S C Finch, J B Vlaming, B L Sutherland, L R Fletcher
AIM: To investigate whether Mediterranean tall fescue (Lolium arundinaceum (Schreb.) Darbysh. (syn Festuca arundinacea)) infected with selected fungal endophytes (Epichloë coenophiala (formerly Neotyphodium coenophialum)) caused equine fescue oedema when grown in New Zealand, and to examine the pathological changes associated with this intoxication. METHODS: Horses were grazed on Mediterranean tall fescue that was infected with the endophytes AR542 (n=2), or AR584 (n=3), or Mediterranean tall fescue that was endophyte-free (n=2)...
October 17, 2016: New Zealand Veterinary Journal
C Bingham, A Hodge, B Mariadass
AIM: To determine if there was a benefit from treating ewes with a low body condition score (BCS) with long acting anthelmintic products pre-lambing and to compare the effects of two commonly used treatment options. METHODS: The study was conducted on a single commercial hill country sheep and beef property in the central North Island of New Zealand. Mixed age twin-bearing ewes were preselected by the farmer as being in poor condition 4 weeks before the planned start of lambing, and were sequentially drafted into three equal groups identified with coloured ear tags...
October 17, 2016: New Zealand Veterinary Journal
S McDougall, C W R Compton, N Botha
AIMS: To determine the factors associated with the selection of antimicrobials by dairy veterinarians, and the attitudes of those veterinarians and dairy farmers to antimicrobial usage and resistance. METHODS: Facilitated focus groups of dairy farmers (n=22) and an anonymous online survey of dairy cattle veterinarians (n=206 respondents) were used to determine prescribing behaviour, factors affecting prescribing of antimicrobials, and the attitudes of veterinarians and farmers to the use of antimicrobials and the risk of antimicrobial resistance (AMR)...
October 16, 2016: New Zealand Veterinary Journal
P Cagnardi, R Villa, G Ravasio, L Lucatello, F Di Cesare, F Capolongo, A Boccardo, D Pravettoni
AIMS: To evaluate the pharmacokinetics of dexmedetomidine (DEX) administered I/V at a dose of 5 µg/kg bodyweight in dairy calves and to compare the sedative effects of anaesthetic protocols involving DEX and xylazine. METHODS: Nine dairy calves, aged 17-20 days, were treated with 5 µg/kg I/V dexmedetomidine. For pharmacokinetic evaluation, blood samples were collected over 12 hours and serum samples were analysed by high performance liquid chromatography-mass spectrometry...
October 12, 2016: New Zealand Veterinary Journal
C Rosales, N Krekeler, B Tennent-Brown, M A Stevenson, D Hanlon
AIMS: To describe selected periparturient variables in a sample of Thoroughbred mares and their foals on a commercial stud farm in New Zealand. METHODS: Data were collected for 969 foaling records from 592 mares by foaling attendants from one Thoroughbred stud farm in the Waikato region of New Zealand for the breeding seasons 2008-2013, inclusive, and collated retrospectively. The association between mare- and foal-level variables and gestation length, time of birth (expressed as the number of hours after midday), fetal membrane retention time, time for the foal to stand and suckle after birth, and foal mortality was quantified using linear and logistic regression models...
October 5, 2016: New Zealand Veterinary Journal
A L Ridler, R A Corner-Thomas, P R Kenyon, K J Griffiths
AIMS: To investigate associations between changes in liveweight and fetal loss in ewe lambs and to determine whether fetal loss was associated with concentrations of progesterone in early and mid-gestation. METHODS: Ewe lambs on two commercial sheep farms (Flock A; n=504 and Flock B; n=460) in the southern North Island of New Zealand were weighed, and body condition score was assessed, prior to breeding and throughout pregnancy. Pregnancy diagnosis was undertaken approximately 56 (PD1), 80 (PD2) and 110 (PD3) days after the start of breeding and fetal loss determined...
October 2, 2016: New Zealand Veterinary Journal
K E Dittmer, R E Morley, R L Smith
CASE HISTORY: A group of 545 pregnant rising 2-year-old Coopdale ewes on a Southland sheep farm were grazed over winter on a fodder beet (Beta vulgaris) crop. Subsequently, 45 out of approximately 750 lambs were born with a variety of skeletal deformities, including shortened limbs, varus and valgus angular limb deformities, palmar grade stance and cranial bowing of the carpus. Analysis of the crop showed the fodder beet contained a low percentage of phosphorus. In addition, 60 out of 460 rising 2-year-old ewes that had been grazed on the fodder beet crop as 1-year-olds had incisor abnormalities and malocclusion...
October 2, 2016: New Zealand Veterinary Journal
B Lebkowska-Wieruszewska, G Barsotti, A Lisowski, A Gazzano, H Owen, M Giorgi
AIMS: To assess the effect of food intake on the pharmacokinetics of grapiprant administered orally at 2 mg/kg, and to estimate its oral bioavailability in dogs. METHODS: Eight healthy female Labrador Retriever dogs, aged 4-10 years were used. In the initial trial two dogs were administered a 0.5 mg/kg I/V bolus of grapiprant dissolved in ethanol. In the second trial, six dogs were assigned to two treatment groups, using a randomised cross-over design, and received 2 mg/kg of grapiprant orally, as pure powder, after fasting for 12 hours or after being fed...
October 2, 2016: New Zealand Veterinary Journal
H M Golder, N Moss, G Rogers, B Jackson, N Gannon, Ptw Wong, I J Lean
CASE HISTORY: A herd of Holstein, Jersey, or Holstein-Jersey cross lactating cattle of mixed ages presented with a sudden drop in milk yield in 94/678 cows on 3 October 2014 (Day 0). The herd was located in Gretna in the Derwent Valley (Tasmania, Australia) and had been grazing dryland pasture. CLINICAL FINDINGS: On Day 0 the cows variably showed recumbency, peracute photosensitisation, inflamed coronary bands, conjunctival erythema, periauricular oedema, distress indicated by kicking at the flank, bruxism, discomfort, weight shifting, vocalisation indicating pain and depression...
October 2, 2016: New Zealand Veterinary Journal
E J Harrison, W E Scherrer, J Fragola, N G Patel, S R Perry, V Janković, A J Staatz
AIMS: To compare the prevalence of minor incisional complications in canine patients undergoing tibial plateau levelling osteotomy (TPLO) surgery that had a hydrogel liquid bandage (HLB) applied to their incision, with patients that had a light adhesive bandage applied. METHODS: Thirty dogs undergoing TPLO surgery were randomly assigned to either application of a light adhesive bandage to the incision, with removal 18-24 hours later, or application of a clear-drying polyethylene glycol HLB to the incision...
September 18, 2016: New Zealand Veterinary Journal
A Karkaba, J Benschop, K E Hill, A Grinberg
AIMS: To characterise methicillin-resistant Staphylococcus aureus (MRSA) isolates from infection sites in animals in New Zealand and assess the prevalence of subclinical MRSA colonisation in dogs and cats attending veterinary clinics in Auckland. METHODS: MRSA isolates from clinical specimens obtained by the main New Zealand veterinary diagnostic laboratories between June 2012 and June 2013, were genotypically characterised by DNA microarray hybridisation analysis and spa typing...
September 7, 2016: New Zealand Veterinary Journal
W D Roe, S Michael, J Fyfe, E Burrows, S A Hunter, L Howe
CASE HISTORY: A 1-year-old female New Zealand sea lion (Phocarctos hookeri) was intermittently observed in the Otago region of New Zealand over an 11-month period, always dragging her hind flippers. In December 2012 the sea lion was found dead, after a period of several days being observed to be harassed by male sea lions. PATHOLOGICAL FINDINGS: At gross postmortem examination the sea lion was in moderate body condition with signs of recent bite wounds and bruising...
September 2, 2016: New Zealand Veterinary Journal
E L Cuttance, W A Mason, K S Denholm, R A Laven
AIM: To evaluate the level of agreement of three indirect testing methods with concentrations of IgG in serum, and to determine their test characteristics for diagnosing failure of passive transfer (FPT), in dairy calves in New Zealand. METHODS: From 17 July to 30 November 2015, 471 blood samples were collected from dairy calves aged 0-8 days, from 19 different commercial dairy farms in the Waikato region of New Zealand. All serum samples were tested for concentrations of IgG and total protein (TP), and gamma-glutamyl transferase (GGT) activity, and 138 samples were tested using a digital Brix refractometer...
August 31, 2016: New Zealand Veterinary Journal
K Lawrence, N Broerse, L Hine, J Yapura, W J Tulley
AIMS: To determine the prevalence of failure of passive transfer (FPT) of maternal antibodies, to identify management factors associated with FPT, and to determine the relationship between interval from the start of calving and calf management practices on concentrations of total protein in the serum of calves, from a sample of spring-calving dairy herds in the Manawatu region of New Zealand. METHODS: This was an observational study involving 11 dairy farms in the Manawatu region serviced by Massey University Farm Services Clinic...
August 30, 2016: New Zealand Veterinary Journal
Richard Laven
No abstract text is available yet for this article.
November 2016: New Zealand Veterinary Journal
E L Cuttance, M A Stevenson, R A Laven, W A Mason
AIMS: To describe and evaluate the current practices used to manage and prevent facial eczema (FE) in North Island dairy herds, and determine the within-herd prevalence of cows with elevated activities of gamma glutamyl transferase (GGT), and with concentrations of Zn in serum <18 μmol/L. METHODS: Between January and May 2014, 105 herd managers from throughout the North Island of New Zealand were invited to participate in the study when regional spore counts for Pithomyces chartarum started to rise towards 30,000 spores/g pasture...
November 2016: New Zealand Veterinary Journal
Kva Kannan, W A Mason, E L Cuttance
AIMS: To determine the variability of concentrations of Zn in feed, when used as a supplement to prevent facial eczema, and to determine the variability in concentrations of Zn in serum between cows and herds that are being supplemented with ZnO in feed, using in-shed feeders or on a feed pad. METHODS: Sixteen commercial dairy farms in the Waikato region of New Zealand were enrolled, that were supplementing cows with ZnO in the feed using either an automatic in-shed feeder (ASF) or a feed pad (FP) using a feed-out or mixer wagon...
November 2016: New Zealand Veterinary Journal
M A Bryan, S Y Hea, S A Mannering, R Booker
AIM: To test the non-inferiority of a novel combination intramammary product containing penicillin and cloxacillin to a reference intramammary product containing oxytetracycline, oleandomycin, neomycin and prednisolone with regard to bacteriological cure and clinical cure. METHODS: Clinical cases of mastitis were sourced from 30 spring-calving dairy farms in the Southland region of New Zealand. Affected quarters were infused three times at 24 hourly intervals with either the novel combination product containing 1 g penicillin and 200 mg cloxacillin, or a reference product containing 200 mg oxytetracycline, 100 mg oleandomycin, 100 mg neomycin and 5 mg prednisolone...
November 2016: New Zealand Veterinary Journal
H Hunt, Gmb Orbell, K N Buckle, H J Ha, K E Lawrence, R A Fairley, J S Munday
CASE HISTORY: Between September and October 2013, 40 of 150 crossbred Friesian dairy calves on a farm in the Manawatu region of New Zealand developed neurological signs when between 1 and 3 months of age. Calves were grazed in multiple mobs and calves from each mob were affected. A variable response was observed to initial treatment with thiamine, fluoroquinolone antibiotics and non-steroidal anti-inflammatory drugs. CLINICAL AND PATHOLOGICAL FINDINGS: Affected calves exhibited a range of neurological signs that included generalised depression, hind limb ataxia with a stiff gait, and knuckling of the fetlocks...
November 2016: New Zealand Veterinary Journal
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