Abstract
Daughter sporocysts of Schistosoma mansoni released from mother sporocysts from Biomphalaria glabrata were cultured monoxenically for 21 days at 27.4 C in a medium consisting of a balanced salt-sugar solution supplemented with lactalbumin hydrolysate, inactivated fetal calf serum, serum Fraction A, and egg ultrafiltrate. The sporocysts were retained in transparent porous membranes so that their germinal development could be observed without interference from the underlying cells of Aedcs albopictus tissue cultures; the membrane permitted interchange of medium between sporocysts and cell cultures. The greatest increase in length, fivefold, occurred by 18 days. Progeny-daughters began to emerge at 9 days. The effects of pH, osmolality, and antibiotics were evaluated in axenizing solutions. Optimal conditions were a pH range of 6.5–7.6 and 113–153 mOsm. Antibiotics were not toxic.
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