[Development of Paragonimus westermani ichunensis in a reservoir host].

Experimental observations showed, that the muscle larva stage of the trematodes Paragonimus westermani ichunensis located in a reservoir host can enlarge its body size. A rate of growth in trematode individuals varied both among different host animals and within one host specimens. When rodents are infected with such muscle larvae, the individuals with the size exceeding 1.15 x 0.33 mm invade into the lungs oh host, while smaller individuals secondarily migrate to muscles.