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Transbound Emerg Dis. 2011 Jun;58(3):274-9. doi: 10.1111/j.1865-1682.2011.01203.x.

Absence of heat intolerance (panting) syndrome in foot-and-mouth disease-affected Indian cattle (Bos indicus) is associated with intact thyroid gland function.

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Indian Veterinary Research Institute, Bangalore, Karnataka, India.


Foot-and-mouth disease (FMD) is a highly contagious and economically important viral disease with high morbidity and reduced productivity of affected animals. We studied the heat intolerance (HI) (panting) syndrome and the effect of FMD virus (FMDV) infection on thyroid gland function in Indian cattle (Bos indicus). Experimental infection with FMDV Asia 1 resulted in a mild form of disease with superficial lesions. Heat intolerance syndrome and its signs were not observed among the recovered animals. Subtle changes in the serum level of thyroid hormones, triiodothyronine (T₃) and thyroxine (T₄) were observed. However, there were no distinct histological changes in the thyroid gland, and FMDV antigens were not detected in the thyroid tissues. Our results thus suggest that the absence of panting syndrome in FMD-affected Bos indicus cattle may be associated with intact thyroid gland function.

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