Effect of gamma-irradiation on the survival and development of the infective larvae of the hookworm,Gaigeria pachyscelis

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Abstract
Irradiation of the infective larvae ofGaigeria pachyscelisRailliet and Henry, 1910 with gamma rays upto 160 Kr had no significant effect on thein vitrosurvival of these larvae for a period of 49 days, maintained either at room temperature (32.2–39.4°C) or at 4°C. However, the behaviour of the irradiated larvae in the lamb host was much changed, as shown by a marked reduction in the worm establishment and the development of stunted and sterile worms from these larvae. As the level of irradiation increased, there was a corresponding decrease in the subsequent worm establishment. It was found that male larvae are more sensitive to the effects of irradiation than female ones, particularly at higher levels.

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