Guy D. Lester

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OBJECTIVE To determine factors associated with development of postoperative ileus (POI) in horses undergoing surgery for colic. DESIGN Prospective case-control study. ANIMALS 251 horses undergoing colic surgery, of which 47 developed POI. PROCEDURE Signalment, history, clinicopathologic data, pre- and postoperative treatments, lesions, complications,(More)
OBJECTIVE To identify factors associated with short-term survival in bacteremic neonatal foals, evaluate the racing performance of Thoroughbred survivors, and evaluate changes in causative organisms and their antimicrobial susceptibility. DESIGN Retrospective case series. ANIMALS 423 bacteremic foals. PROCEDURES Medical records of foals that were(More)
OBJECTIVE To determine prevalence of anthelmintic resistance in cyathostome nematodes of horses in the southern United States. DESIGN Cross-sectional study. ANIMALS 786 horses on 44 farms and stables in Georgia, South Carolina, Florida, Kentucky, and Louisiana. PROCEDURE Fecal egg count (FEC) reduction tests were performed on 44 large farms and(More)
A 4-year-old Arab mare was diagnosed with disseminated cryptococcosis, including osteomyelitis of the proximal phalanx of the left hind limb, osteomyelitis with associated soft tissue granuloma of a rib and disseminated, large cryptococcal nodules in the lungs. The lesion in the dorsoproximal aspect of the proximal phalanx had a large area of cortical lysis(More)
  • Guy D Lester
  • The Veterinary clinics of North America. Equine…
  • 2005
The immature foal frequently represents a significant management challenge to even the most experienced clinician. The clinical course typically involves complications to a range of body systems,including the musculoskeletal, respiratory, and gastrointestinal systems. Before the commencement of treatment, it is important to provide the owner with an(More)
OBJECTIVE To determine effect of xylazine hydrochloride (XYL), yohimbine hydrochloride (YOH), bethanechol chloride (BET), neostigmine methyl sulfate (NEO), or flunixin meglumine (FLU) on ileocecocolic myoelectric activity and passage of radiolabeled markers from the cecum. ANIMALS 6 healthy adult ponies. PROCEDURE A cecal cannula was surgically(More)
OBJECTIVE To evaluate the reliability of a method for inducing colic via small intestinal distention in horses and to examine the analgesic potential of bilateral electroacupuncture (EAP) at the Guan-yuan-shu (similar to BL21) acupoint. ANIMALS 5 healthy adult horses, each with a gastric cannula. PROCEDURE A polyester balloon connected to an electronic(More)
The aim of this retrospective study was to determine the clinical usefulness of thoracic ultrasonography compared to thoracic radiography in evaluation of Rhodococcus equi pneumonia. Criteria for patient inclusion in this study were: (1) isolation of R. equi from transtracheal aspirate, (2) radiographic evaluation of the pulmonary parenchyma, and (3)(More)
An experimental model of ascending placentitis was developed in the mare to characterize the uterine myoelectrical pattern in late gestation and determine how ascending placentitis altered this pattern. In experiment 1, myometrial electrical activity was analyzed during the early morning, late morning and evening hours in four mares in the last 15 days of(More)
Serum levels of the important hormone 1,25-dihydroxyvitamin D (1,25-diOHD, calcitriol) have not been extensively evaluated in patients with cystic fibrosis (CF) during the critical period of skeletal growth and development. This study was a cross-sectional, observational assessment of 25-hydroxyvitamin D (25-OHD, calcidiol) and 1,25-diOHD levels in 54(More)