TY - JOUR

T1 - In vitro culture of the avian echinostome Himasthla elongata

T2 - From redia to marita

AU - Gorbushin, Alexander M.

AU - Shaposhnikova, Tatjana G.

PY - 2002/8/1

Y1 - 2002/8/1

N2 - Axenic primary cultures of Himasthla elongata rediae harvested from hepatopancreas of naturally infected marine prosobranch snail Littorina littorea were maintained in Leibovitz's L-15 medium (osmolarity of approximately 780mOsm, pH 7.8, temperature 14°C under normal atmospheric conditions). Cultured rediae were active, motile and demonstrated high synthetic activity in metabolic labelling experiment. Long-term cultivation experiment showed 50% survival level of the rediae for up to 70 days and significant differences between mortality in redia groups derived from different host individuals. Half of the rediae in the most robust group survived for up to 163 days, when the experiment was terminated. Development and emergence of in vivo preformed cercariae and daughter rediae was observed. Cercariae in the culture also encysted, transformed into metacercariae and some of them in one to two weeks after the transformation spontaneously excysted into juvenile maritae. The employed culture system is characterized by a very low level of proteolytic activity. This system is suggested as a method permitting to obtain rediae secretory-excretory products free of host-derived contaminants.

AB - Axenic primary cultures of Himasthla elongata rediae harvested from hepatopancreas of naturally infected marine prosobranch snail Littorina littorea were maintained in Leibovitz's L-15 medium (osmolarity of approximately 780mOsm, pH 7.8, temperature 14°C under normal atmospheric conditions). Cultured rediae were active, motile and demonstrated high synthetic activity in metabolic labelling experiment. Long-term cultivation experiment showed 50% survival level of the rediae for up to 70 days and significant differences between mortality in redia groups derived from different host individuals. Half of the rediae in the most robust group survived for up to 163 days, when the experiment was terminated. Development and emergence of in vivo preformed cercariae and daughter rediae was observed. Cercariae in the culture also encysted, transformed into metacercariae and some of them in one to two weeks after the transformation spontaneously excysted into juvenile maritae. The employed culture system is characterized by a very low level of proteolytic activity. This system is suggested as a method permitting to obtain rediae secretory-excretory products free of host-derived contaminants.

UR - http://www.scopus.com/inward/record.url?scp=0036707341&partnerID=8YFLogxK

U2 - 10.1016/S0014-4894(02)00147-9

DO - 10.1016/S0014-4894(02)00147-9

M3 - Article

C2 - 12594965

AN - SCOPUS:0036707341

VL - 101

SP - 234

EP - 239

JO - Experimental Parasitology

JF - Experimental Parasitology

SN - 0014-4894

IS - 4

ER -