[Glycogen and lipids in the developmental cycle of helminths]

Survival, vitality and potency for development and infectivity of the larvae of helminths are discussed in relation to lipid-glycogen disposition depending on the environment of first order (host) and the environment of second order (environment of the host). The "cycle" of glycogen and fat is demonstrated basing on the thesis on "helminths with short time and long time development" with Ascaris lumbricoides as example. The figure shows that the different quantitative parts of glycogen and fat are the physiological base for the function of the developmental cycle of A. lumbricoides.