Paul Gotis‐Graham     

R Malik  A Chiu  C Klupiec  W Lee  P Tisdall  K DeMaere  PJ Canfield 《Australian veterinary journal》2014,92(5):148-148

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Livestock diseases and their control in New South Wales: 1901 to 1988     

PJ MYLREA 《Australian veterinary journal》1997,75(12):880-882

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The resistance of meat chickens vaccinated by aerosol with a live V4 Newcastle disease virus vaccine in the field to challenge with a velogenic Newcastle disease virus     

IG BELL  PJ NICHOLLS  C. NORMAN  AINI IDERIS†  GM CROSS† 《Australian veterinary journal》1991,68(3):97-101

Meat chickens housed on a commercial broiler farm in Australia were vaccinated once at 10 to 11 days-of-age by aerosol with live V4 Newcastle disease virus (NDV) vaccine. Groups of vaccinated and unvaccinated birds were flown to Malaysia, where they were challenged with a virulent strain of NDV. Survival rates in vaccinated chickens challenged 7, 14, 21 or 31 d after vaccination were 0.47, 0.77, 0.97 and 0.92, respectively. All unvaccinated chickens died due to Newcastle disease (ND) following challenge. Chickens in Australia and Malaysia were bled and the serums tested for haemagglutination-inhibiting (HI) antibody to NDV. Many vaccinated birds with no detectable antibody, and all birds with a log2 titre of 2 or greater, survived challenge. The results showed that this V4 vaccine induced protective immunity in a significant proportion of chickens within 7 d of mass aerosol vaccination. This early immunity occurred in the absence of detectable circulating HI antibody. Non-HI antibody mediated immunity continued to provide protection up to 31 d after vaccination. Almost all vaccinated birds were protected within 3 w of vaccination. It is concluded that the V4 vaccine is efficacious and could be useful during an outbreak of virulent ND in Australia.  相似文献   

Clinical and pathological findings of Babesia infection in dogs   总被引：1，自引：0，他引：1  

PJ IRWIN  GW HUTCHINSON 《Australian veterinary journal》1991,68(6):204-209

The clinical and pathological findings of Babesia infection in 32 dogs in northern Australia are presented. Eleven different breed types were represented from 6 localities in north Queensland and one locality in northern Western Australia. Twenty three (72%) were males. Babesia-infected dogs were grouped by the degree of haematological disturbance and clinical severity: Acute babesiosis (25/32), all pups with severe haemolytic anaemia; subclinical carriers (5/32) with non-specific malaise, characterised haematologically by a normal erythrogram but marked leucopenia; chronic anaemia, observed in 2 adult dogs. Pups were azotaemic (serum urea greater than 6.6 mmol/l) and had elevated serum bilirubin levels (20.8 to 48.5 mmol/l). Total serum protein was usually within the normal range. Pups that died were also hypoglycaemic and severely hyperkalaemic (K+ greater than 10 mmol/l). Low parasitaemias in routine blood smears complicated diagnosis but smears made from ear or toe capillaries, or after haematocrit concentration, greatly enhanced finding parasitised cells. At necropsy, pallor and jaundice were the most consistent observations. Haemoglobinuric nephrosis, an active reticulo-endothelial system and capillaries packed with large numbers of infected erythrocytes were the main histopathological findings. A combination of imidocarb dipropionate at 5 mg/kg body weight, given intramuscularly, with fluid therapy and blood transfusion was the most successful treatment.  相似文献   

Isolation of Haemophilus Taxon "minor group" from pigs     

PJ BLACKALL  AR MERCY  N BULLER  J DICKSON  R FOGARTY  D JAMESON 《Australian veterinary journal》1991,68(3):119-120

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Monensin controlled-release intraruminal capsule for control of bloat in pastured dairy cows   总被引：1，自引：0，他引：1  

LB LOWE  GJ BALL  VR CARRUTHERS†  RC DOBOS‡  GA LYNCH  PJ MOATE  PR POOLE†  SC VALENTINE 《Australian veterinary journal》1991,68(1):17-20

Monensin, a polyether ionophore antibiotic, is potentially an important agent for bloat relief in dairy cows grazing temperate legume-based pasture. A series of studies was undertaken to determine the effect of monensin, when delivered continuously in the rumen of lactating dairy cows by means of controlled-release capsules (monensin CRC). Such devices release approximately 300 mg/head/day for 100 d. A short-term pilot study made at Ruakura, New Zealand, tested monensin CRC in cows selected for high susceptibility to bloat and grazing lucerne (Medicago sativa) or red clover (Trifolium pratense). Treatment significantly reduced the incidence of bloat, while milk yield and protein yield were increased. There was no effect on fat yield. Following the pilot study, 6 large-scale field experiments involving a total of 368 lactating dairy cows, were made in Australia and New Zealand to confirm the effectiveness of monensin CRC for bloat control and to measure the effect of such treatment on milk production and composition. A severe bloat problem occurred in 2 experiments, mild bloat occurred in 2 others, while no visual signs of bloat were observed in the remaining 2 experiments. Bloat was significantly (P less than 0.05) reduced by monensin CRC treatment when data was pooled over the 4 experiments in which bloat occurred. Daily milk yield was increased in all experiments from a mean of 17.7 in untreated groups to 18.8 kg/head/day (P less than 0.05) in monensin CRC-treated cows. Protein percentage was not affected by treatment, while there was a decrease from 4.29 to 4.10% fat, although total fat yield was not affected.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

An evaluation of the cross-protection afforded by inactivated infectious coryza vaccines   总被引：2，自引：0，他引：2  

PJ BLACKALL 《Australian veterinary journal》1991,68(8):266-267

The cross-protection afforded by three inactivated infectious coryza vaccines was evaluated. Each vaccine contained one of the following strains of Haemophilus paragallinarum, HP31, HP60 and HP14. Strain HP31 belongs to Kume serovar C-2, strain HP60 belongs to Kume serovar C-4 while strain HP14 belongs to Kume serovar A-4. Four groups of twenty six-week-old specific-pathogen-free chickens were either given a single dose of an aluminium-hydroxide based vaccine (three groups) or left as unvaccinated controls. Three weeks after vaccination, all four groups were challenged with virulent H paragallinarum. One half of each group was challenged with the strain HP31 and the other half with strain HP60. The efficacy of the vaccines was assessed in terms of the prevention of the typical clinical signs and macroscopic lesions of infectious coryza as well as the prevention of any colonisation by the challenge organism. The serovar C-2 and serovar C-4 vaccines protected more than 50% of birds against either a serovar C-2 or C-4 challenge while the serovar A-4 vaccine protected less than 50% of birds.  相似文献   

The prevalence of itchmite, Psorergates ovis, among sheep flocks with a history of fleece derangement     

PW JOHNSON  JW PLANT  JC BORAY  SC BLUNT  PJ NICHOLLS 《Australian veterinary journal》1990,67(4):117-120

An investigation of sheep flocks in the main sheep raising areas of New South Wales showed that the itchmite Psorergates ovis was frequently associated with fleece derangement. In 26 of the 41 flocks examined, P. ovis was the only ectoparasite detected. P. ovis and the sheep body louse Damalinia ovis, were found in 5 flocks. No external parasites were found on sheep examined from the 10 remaining flocks. The type of fleece derangement most frequently recorded was rubbing which in some cases was combined with areas of chewed fleece. Among flocks, there were positive relations between the prevalence of fleece derangement and prevalence of itchmite or scurf and between itchmite count and mean scurf score. Within flocks, itchmite infested sheep or sheep with scurf had higher prevalences of fleece derangement than sheep on which no mites or no scurf were found. Itchmite infested sheep had a higher prevalence of scurf than those with no detectable mite infestation. There were no significant differences in itchmite populations or fleece derangement between untreated flocks and flocks treated with synthetic pyrethroids, organophosphates or arsenic and rotenone.  相似文献   

鸡传染性鼻炎流行病学调查（Ⅱ）   总被引：5，自引：0，他引：5  

张培君  陈小玲  苗得园  宋程  龚玉梅 《中国兽药杂志》2001,35(1):21-22

利用鸡传染性鼻炎PCR试剂盒和阻断ELISA试剂盒，对29份菌株、136份临床样品和1019份血清进行了检验和分析，结果PCR阳性率为36.4%，A型阳性率为10.3%，C型阳性率为6.4%。  相似文献   

A longitudinal study of lymphocyte subsets in a cohort of cats naturally-infected with feline immunodeficiency virus     

C. WALKER  PJ CANFFIELD†  DN LOVE†  DR McNEIL‡ 《Australian veterinary journal》1996,73(6):218-224

Despite the potential of feline immunodeficiency virus (FIV) as an animal model for human immunodeficiency virus (HIV) studies, the long term effects of naturally-occurring infection have not been determined. HIV infection causes an ongoing deterioration in immune function which directly correlates with disease, in particular acquired immunodefciency syndrome (AIDS). However, it is not known whether FIV-induced immunosuppression is progressive or related to the clinical condition. This study examined changes in lymphocyte subset numbers of serial samples, taken from cohorts of FIV-positive and FIV-negative cats over an 18-month period. FIV-positive cats were clinically staged as asymptomatic carriers (AC) or cats with AIDS-related complex (ARC), and FIV-negative cats matched and staged on the basis of similar diseases. During the course of the study, 4 FIV-positive cats developed AIDS, classed as the terminal stage of infection. There were no significant differences in the mean absolute numbers of any lymphocyte subset between the onset (to) and the completion (t18) of the study. Similarly there were no significant changes in subset numbers during the 18 months preceding the development of AIDS. While the study period was brief and the sample sizes small, it is postulated that FIV infection in Australia may not necessarily cause progressive immunodeficiency and that FIV-induced immunosuppression (as measured by subset analysis) may not be well correlated with the clinical status of the infected cat.  相似文献