High-Performance Liquid Chromatography Determination of Meloxicam and Piroxicam with Ultraviolet Detection

A simple accurate and sensitive high-performance liquid chromatographic method for the determination of meloxicam and piroxicam concentrations in small volume plasma samples has been developed. Following a liquid extraction using chloroform, samples were separated by reversed-phase high-performance liquid chromatography on an XBridge C18 column (4.6 × 250 mm) and quantified using ultraviolet detection at 360 nm. The mobile phase was a mixture of water with glacial acetic acid (pH 3.0) and acetonitrile (50 : 50), with a flow rate of 1.0 mL/min. The standard curve ranged from 5 to 10,000 ng/mL for meloxicam in bearded dragon (Pogona vitticeps) plasma and piroxicam in crane (Grus rubicunda) plasma. Intra- and interassay variability for meloxicam and piroxicam were less than 10% and the average recovery was greater than 90% for both drugs. This method was developed in bearded dragon and crane plasma and should be applicable to any species, making it useful for those investigators dealing with small sample volumes, particularly when conducting pharmacokinetics studies which require multiple sampling from the same animal

Complete genome sequence of an astrovirus identified in a domestic rabbit (\u3cem\u3eOryctolagus cuniculus\u3c/em\u3e) with gastroenteritis

A colony of domestic rabbits in Tennessee, USA, experienced a high-mortality (~90%) outbreak of enterocolitis. The clinical characteristics were one to six days of lethargy, bloating, and diarrhea, followed by death. Heavy intestinal coccidial load was a consistent finding as was mucoid enteropathy with cecal impaction. Preliminary analysis by electron microscopy revealed the presence of virus-like particles in the stool of one of the affected rabbits. Analysis using the Virochip, a viral detection microarray, suggested the presence of an astrovirus, and follow-up PCR and sequence determination revealed a previously uncharacterized member of that family. Metagenomic sequencing enabled the recovery of the complete viral genome, which contains the characteristic attributes of astrovirus genomes. Attempts to propagate the virus in tissue culture have yet to succeed. Although astroviruses cause gastroenteric disease in other mammals, the pathogenicity of this virus and the relationship to this outbreak remains to be determined. This study therefore defines a viral species and a potential rabbit pathogen

Oncological Outcomes in Rats Given Nephrocarcinogenic Exposure to Dietary Ochratoxin A, Followed by the Tumour Promoter Sodium Barbital for Life: A Pilot Study

The potent experimental renal carcinogenesis of ochratoxin A (OTA) in male rats makes the dietary contaminant a potential factor in human oncology. We explored whether the tumour promoter sodium barbitate could shorten the otherwise long latency between exposure to toxin and tumourigenesis. Young rats, of a hybrid in which mononuclear leukaemia was rare, were given feed contaminated (5 ppm) with OTA for 36 weeks to initiate renal tumourigenesis. Some individuals were thereafter given sodium barbitate (500 ppm in drinking water) for life. Pathological outcomes were studied at or near the end of natural life. Renal tumours in males given barbitate became evident after latency of one year, but only slightly before those without barbitate. In contrast, female mammary tumourigenesis was advanced by at least 6 months synchronously in all rats given the OTA-barbitate regimen compared to tumourigenesis in controls. Diagnosis of malignant mammary angiosarcoma in a female given the OTA-barbitate regimen is a new finding in the rat. The long latency of OTA-induced renal tumourigenesis was not notably susceptible to accelerated promotion by barbitate, contrasting with an apparently marked effect of barbitate on development of mammary tumours

Flower in Winter at UT Gardens

A flower in winter at the UT Gardens.https://trace.tennessee.edu/utiaphoto_2013/1135/thumbnail.jp

Snowy Walkway at UT Gardens

A snowy walkway at the UT Gardens.https://trace.tennessee.edu/utiaphoto_2013/1137/thumbnail.jp

Specks the Chicken at UT Veterinary Medical Center

“Specks” the chicken, taken in the UT Veterinary Medical Center’s Avian and Exotics Ward, owned by our Veterinary technician.https://trace.tennessee.edu/utiaphoto_2013/1016/thumbnail.jp

Rose in Winter at the UT Gardens

Great UT color!https://trace.tennessee.edu/utiaphoto_2013/1134/thumbnail.jp

UT Gardens in Winter 2

UT Gardens in winter.https://trace.tennessee.edu/utiaphoto_2013/1138/thumbnail.jp

Spa Day at the Hospital

This chicken had a problem with her foot that required soaking them in a special solution for 15 minutes. She was a model patient in that she stayed still for this treatment and seemed to even enjoy it.https://trace.tennessee.edu/utiaphoto_2015/1069/thumbnail.jp

Opossum Rehabilitation

The Wildlife Clinic at UT College of Veterinary Medicine helps over 1200 injured native wildlife every year. This was an opossum whose mother had been run over by a car.https://trace.tennessee.edu/utiaphoto_2015/1066/thumbnail.jp