studies of s. mansoni development in rattus rattus show that there is better infectivity and survival for the caribbean strain than the cameroon strain : the percentage worm recovery 4 weeks after exposure in 34 % for s. mansoni from guadeloupe , 14 % for s. mansoni from the cameroons , and 31 % for the hybrids .
C0043122
caribbean
C0018301
guadeloupe