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Appl Environ Microbiol. 1975 May; 29(5): 641-645
Copyright © 1975 American Society for Microbiology. All Rights Reserved.

Egg Production, Shell Thickness, and Other Physiological Parameters of Laying Hens Affected by T-2 Toxin1

R. D. Wyatt, J. A. Doerr, P. B. Hamilton and H. R. Burmeister

* Department of Poultry Science and Microbiology, North Carolina State University, Raleigh, North Carolina 27607, and Northern Regional Research Laboratory, Peoria, Illinois 61604

ABSTRACT

T-2 toxin has been reported to cause severe oral lesions and neural disturbances in young broiler chickens. T-2 toxin, when added at a level of 20 µg per g of feed, caused oral lesions but no abnormal neural disturbances in young broiler chickens. T-2 toxin, when added at a level of 20 µg per g of feed, caused oral lesions but no abnormal neural symptoms in laying hens. T-2 toxin had no effect on either hemoglobin, hematocrit values, erythrocyte count, plasma glucose, prothrombin times, or the sizes of the liver, spleen, pancreas, and heart. Lipid content of the liver was not altered. Feed consumption, however, was reduced, as were the total plasma protein and lipid concentrations and the total leukocyte count. Most important economically was the lowered egg production and a thinner egg shell. The timing and severity of the symptoms suggest that T-2 toxin causes primary oral lesions that reduce feed consumption with a consequent reduction in serum proteins and lipids, which culminate in decreased egg production. The leucopenia and thinner egg shell may be independent systemic effects of T-2 toxin in laying hens.

FOOTNOTES

1 Paper no. 4555 of the Journal Series of the North Carolina Agricultural Experiment Station, Raleigh, N. C.

Appl Environ Microbiol. 1975 May; 29(5): 641-645
Copyright © 1975 American Society for Microbiology. All Rights Reserved.





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