(1985) Susceptibility of equine bacterial isolates to antimicrobial agents. A m. J. vet. Res. 46, 447-450. (1977) Therapeutic use of gentamicin in horses: concentrations in serum, urine and synovial fluid and evaluation of renal function. Ampicillin trihydrate in foals : Serum concentrations and clearance after a single oral dose. Equine vet. J. 16, 371-373. Burrows, 0. E., MacAllister, C. G., Beckstrom, D. A. and Nick, J. T. (1985) Rifampin in the horse: Comparison of intravenous, intramuscular and oral administration. Am. J. vet. Res. 46,442-446. Dalton, R. G. (1968) Renal function in neonatal calves: Insulin, thiosulphate and para-aminohippuric acid clearance. Br. vet. J. 124, 498-502. Ericcson, H. M. and Sherris, J. C. (1971) Antibiotic sensitivity testing. Report of an international collaborative study. Acta Parhol. Microbiol. Immunol. Scand. 211 [BI, 1-90, Feuer, 0. (1979) Action of pregnancy and various progesterones on hepatic microsomal activities, Drug. Metab. Rev. 9, 147-169. Friis. C. (1979) Postnatal development of renal function in piglets: Glomerular filtration rate, clearance of PAH and PAH extraction. Bid. Neonate 35, 180-187. 364-367. EQUINE VETERINARY JOURNAL Friss, C. (1983) Postnatal development of renal function in goats. In: Veterinary Pharmacology and Toxicology, Eds Y. Ruckebusch, P.-L. Toutain and G. D. Koritz. MTP Press, Lancaster. pp 57-62. Horster, M. and Valtin, H. (1971) Postnatal development of renal function : Micropuncture and clearance studies in the dog. J. d i n. Invest. 50, 779-795. Mannering, G. J. (1985) Drug metabolism in the newborn. Fed. Proc. Prescott, J. G. and Baggot, J. D. (1985) Antimicrobial susceptibility testing and antimicrobial drug dosage. J. A m. vet. med. Ass. 187, Treatment of Corynebacterium equi pneumonia of foals : A review. J. A m. vet. med. Ass. 187, 725-728. Reiche, R., Mulling, M. and Frey, H.-H. (1980) Pharmacokinetics of chloramphenicol in calves during the first weeks of life. J. vet. Pharmacol. Ther. 3, 95-106. Riviere, J. E., Traver, D. S. and Coppoc, G. L. (1982)Gentamicin tovic nephropathy in horses with disseminated bacterial infection. J. Am. vet. med. Ass. 180, 648-651. Short, C. R. and Davis, L. E. (1970) Perinatal development of drug-metabolizing enzyme activity in swine. J. Pharmacol exp. Ther. 174, Thornsberry, C., Anhalt, J., Barry, A. L. et al (1983) Methods for dilution antimicrobial susceptibility tests for bacteria that grow acrobically. Null. Comm. Clin. Lab. Standards: Fracture of the supraglenoid tubercle: Treatment and results in five horses PANKOWSKI, R. L., GRANT, B. D., SANDE, R. and NICKELS, F. A. (1986) Vet. Surg. 15, 33-39. FIVE horses, seven months to two years of age, were presented with fractures of the supraglenoid tubercle of three weeks to one year duration. The configuration of the fractures, the degree of displacement and articular involvement were variable. One horse, seven months of age, with a non-articular fracture was treated conservatively and was able to race successfully at two years of age. A second hors...