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Recovery of newborn larvae from cardiac tissues. International Journal for Parasitology24: 271–272. Newborn larvae (NL) of Trichinella spiralisin cardiac tissues were recovered by incubating cardiac tissue blocks of mice and gerbils infected with T. spiralisin RPMI-1640 medium supplemented with antibiotics and 5% FCS for 24 h in a humidified atmosphere of 5% CO2in air at 37°C. This technique is effective for the recovery of migrating NL in visceral tissues which are en route to skeletal muscles, and may help to clarify the involvement of NL in the pathogenesis of cardiac or cerebral lesions in trichinellosis.