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Histochemical and Biochemical Observations on Muscles from Fasted-Refed Pigs

University of Wisconsin, Madison ², ^,3

Abstract

Four groups of porcine animals were studied to determine the effects of prolonged fasting and subsequent rehabilitation on various fat and muscle tissues of the body. A 42-day fasting period resulted in pigs with less fatback, smaller muscle fibers, thinner elongated intramuscular fat cells, fewer sudanophilic fibers and less intramuscular fat than littermate controls. A 16-day rehabilitation period was not of sufficient length to restore all of the deficiencies in the fat and muscle tissue of the fasted animals even though their body weights had been restored to that prior to starvation.

¹ Present address: Department of Animal Sciences, University of Kentucky, Lexington.

² Published with the approval of the Director of the Wisconsin Agricultural Experiment Station, Department of Meat and Animal Sciences. Paper No. 520.

³ Supported in part by a grant from the American Meat Institute Foundation, Equipment used was purchased in part by Public Health Service Grant No. U100266-09 from the National Center for Urban and Industrial Health.