Effects of dopamine and dobutamine on isoflurane-induced hypotension in Hispaniolan Amazon parrots (Amazona ventralis)     

Schnellbacher RW  da Cunha AF  Beaufrère H  Queiroz P  Nevarez JG  Tully TN 《American journal of veterinary research》2012,73(7):952-958

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Comparison of acetate tape impression with squeezing versus skin scraping for the diagnosis of canine demodicosis     

AV Pereira  SA Pereira  IDF Gremião  MP Campos  AMR Ferreira 《Australian veterinary journal》2012,90(11):448-450

This study compared the sensitivity of acetate tape impression and skin squeezing with that of deep skin scraping for the diagnosis of demodicosis in dogs. Demodex canis was detected in 100% of acetate tape impressions obtained after skin squeezing and in 90% of deep skin scrapings. There was a significant difference (P < 0.001) between the techniques in the total number of mites detected. Acetate tape impression with skin squeezing was found to be more sensitive than deep skin scraping and is an alternative diagnostic method for canine demodicosis.  相似文献   

Conventional and Doppler ultrasound for the differentiation of benign and malignant canine mammary tumours     

Feliciano MA  Vicente WR  Silva MA 《The Journal of small animal practice》2012,53(6):332-337

Objectives : The aim of this study was to evaluate the sensitivity of conventional and Doppler ultrasound for differentiation of benign and malignant mammary tumours in female dogs. Methods : Mammary tumours were evaluated from 60 animals and divided into two distinct groups, group 1 (benign tumours) and group 2 (malignant tumours). The tumours were assessed by conventional ultrasound, Doppler ultrasound mode, histopathology and immunohistochemical detection of vascular endothelial growth factor. Results : Conventional ultrasound examination was found to be ineffective in separating tumours into the two experimental groups. Similarly, using colour‐flow Doppler ultrasound, no correlation was found between the presence of vascularisation and its characteristics between the two groups. Triplex Doppler ultrasound yielded average maximum velocities of 28·71 cm/s for malignant and 19·91 cm/s for benign tumours, which were significantly different (P=0·01). For vascular endothelial growth factor, an average score of 2·22 was found for group 2 and 1·66 for group 1 (P=0·03). Positive correlations were found between vascular endothelial growth factor and presence of vascularisation (P=0·04 and r=0·3658) and between vascular endothelial growth factor and maximum velocity (P=0·03 and r=0·3913). Clinical Significance : Doppler evaluation may be used to predict malignancy of mammary tumours in bitches.  相似文献   

Shrinkage of microaggregates in Brazilian Latosols during drying: significance of the clay content,mineralogy and hydric stress history     

A. Reatto  A. Bruand  E. M. Silva  R. Gugan  I. Cousin  M. Brossard  E. S. Martins 《European Journal of Soil Science》2009,60(6):1106-1116

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Food intake and appetite control in a GH-transgenic zebrafish     

Camila Dalmolin  Daniela Volcan Almeida  Marcio Azevedo Figueiredo  Luis Fernando Marins 《Fish physiology and biochemistry》2015,41(5):1131-1141

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Inheritance of resistance to a Bacillus thuringiensis toxin in a field population of diamondback moth (Plutella xylostella)     

Amparo C. Martínez-Ramírez  Baltasar Escriche  M. Dolores Real  Francisco J. Silva  Juan Ferr 《Pest management science》1995,43(2):115-120

Inheritance of resistance to the Bacillus thuringiensis Berl. CryIA(b) crystal protein was studied in Plutella xylostella L. (diamondback moth). A field population 50-fold more resistant to CryIA(b) than a control susceptible strain was used. Dose-mortality curves of the resistant population, the susceptible strain and the F₁ from the two reciprocal crosses were compared. Resistance transmission to the F₁ was dependent on the sex of the resistant progenitor. Sex ratio of the survivors to high doses of CryIA(b) in the F₁ of the two reciprocal crosses did not corroborate the preliminary hypothesis of resistance being due to a recessive sex-linked allele. Since, in a previous work, the loss of CryIA(b) binding capacity of resistant insects had been demonstrated, binding to midgut tissue sections from F₁ individuals was also analysed. The presence of binding in all of the F₁ preparations showed that, at least, a recessive autosomal allele was responsible for the loss of binding capacity in the resistant population.  相似文献   

Collagen dysplasia (cutaneous asthenia) in a cat     

Sequeira JL  Rocha NS  Bandarra EP  Figueiredo LM  Eugenio FR 《Veterinary pathology》1999,36(6):603-606

Hereditary collagen dysplasias comprise a complex group of connective-tissue disorders that result in the reduced tensile strength of affected tissues. These processes are called cutaneous asthenia in the skin of dogs and cats. We report here the case of a crossbred male cat, aged 6 months, that presented with two skin wounds in the region of the right thorax and right iliac tuberosity. The skin of these regions and of the animal's dorsum was hyperextensible, smooth to the touch, and easily torn with minor trauma. Microscopic examination of skin samples revealed reduced dermal connective tissue consisting of shortened and fragmented collagen fibers. Normal fibers were intermingled with altered fibers. Ultrastructural changes in collagen fibers included disorientation of fibrils within the same bundle, marked spacing differences, and variation in the diameter of transverse sections. The fibrils maintained the transverse striations characteristic of normal collagen.  相似文献   

Detection of genomic variability in different populations of the cattle tick Boophilus microplus in southern Brazil     

Passos DT  Ferreira CA  da Silva SS  Richter MF  Ozaki LS 《Veterinary parasitology》1999,87(1):83-92

DNA from seven isolates of the cattle tick Boophilus microplus was analyzed by restriction fragment length polymorphism (RFLP). Three different cDNA clones, named P-9, P-25 and CP-12, isolated from a B. microplus cDNA library, were used as DNA probes. DNA sequences of P-9 have high similarity to ribosomal genes, whereas P-25 does not show significant homology with known sequences within databases. CP-12 is a cDNA clone encoding a cysteine endopeptidase gene. A limited degree of polymorphism was detected with P-9 and P-25, while CP-12 showed a different pattern of bands for each tick isolate. These findings suggest the existence of a complex genotypic diversity of the tick B. microplus population in endemic regions.  相似文献   

The use of preserved equine renal capsule to repair lamellar corneal lesions in normal dogs   总被引：1，自引：0，他引：1  

Andrade AL  Laus JL  Figueiredo F  Batista CM 《Veterinary ophthalmology》1999,2(2):79-82

The purpose of this study was to evaluate the use of equine renal capsule preserved in 98% glycerine to repair lamellar corneal lesions in normal dogs. For this purpose, 12 dogs, divided into six groups ( n  = 2), were used to evaluate the 1st to 7th day, 15th day and 30th to 60th postoperative day. In order to perform the histologic study, the clinical procedures were analyzed, while the recipient's corneas were collected. The photophobia and blepharospasm also were more intense in the 1st to 7th postoperative day, and regressed in the 15th postoperative day. Therefore, the edema and the vascular events were both more frequent in the intermediary phases and regressed in the late periods. On the other hand, the morphological evaluation demonstrated an inflamatory exudate, also in the intermediary and late periods. These results suggested that the equine renal preserved capsule could be a useful alternative tissue to repair lamellar corneal lesions in dogs.  相似文献   

Experimental infection of calves with a gI, gE, US9 negative bovine herpesvirus type 5     

Hübner SO  Oliveira AP  Franco AC  Esteves PA  Silva AD  Spilki FR  Rijsewijk FA  Roehe PM 《Comparative immunology, microbiology and infectious diseases》2005,28(3):187-196

In this work, a role for the genes encoding glycoproteins I (gI) and E (gE) and the US9 protein of bovine herpesvirus type 5 (BHV-5) in neuropathogenicity and reactivation of latent infections was examined. Calves infected intranasally with a gI/gE/US9 deleted recombinant shed up to 10(2.85) TCID50/ml infectious virus in nasal secretions. Calves infected with the wild type BHV-5 parental virus shed up to 10(5) TCID50/ml virus. No signs of disease were observed in calves infected with the recombinant virus, whereas those infected with wild type virus displayed respiratory and neurological signs. The recombinant was only able to reach the basal portions of the central nervous system. In contrast, wild type virus was found widespread within the brain. Reactivation with dexamethasone 60 days post-infection resulted in reactivation of wild type virus, whereas the recombinant virus could not be reactivated. These studies demonstrate that genes gI, gE and US9 of BHV-5 are important for its neuropathogenicity and its ability to reactive from latency.  相似文献