The development of Hymenolepis diminuta tapeworms of inbred line WMS il1 in rats of the WAG alb. race in primary and secondary infections of varying intensity

Following its termination by the antihelminthic Yomesan, a primary infection due to the administration of 50 H. diminuta cysticercoids has no significant influence on the abundance, length or dry mass of tapeworms in a secondary infection of 7, 13 and 42 days, or 8 months duration in WAG alb. rats. Crowded primary and secondary tapeworm infections experienced only slightly greater proportional losses than low-abundance populations. In no period of study was there any destrobilation of tapeworms.