Abstract
We have studied the susceptibility to Herpes Simplex Virus Type 1 (HSV-1) infection in malnourished rats. Groups of 10 rats were undernourished during suckling by offspring duplication. The animals were put on commercial diet and at 1, 2, 3, 5 and 8 weeks after weaning, infected in the eye by scarification with HSV-1, strain F. Significant differences in morbidity and mortality were observed between malnourished and control groups infected three weeks after weaning. Viral titres were higher in ocular washings and brains obtained from the malnourished group. This group showed a diminution in antigen dependent lymphocyte proliferation compared to control, and significantly lower delayed type hypersensitivity reaction against inactivated virus (malnourished = 0.16 +/- 0.02 mm, control = 0.26 +/- 0.03 mm, p < 0.05). Neutralizing antibodies in serum were lower in the malnourished group and lower levels of interferon were obtained in the malnourished group 24 h post-infection. We conclude that malnutrition during suckling induces a delay in the capability to overcome HSV infection.
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