[On micromorphological changes of bradyzoites of toxoplasma cysts in cerebral tissue after storage under freezing at--20 degrees C (author's transl)].
Toxoplasma bradyzoites in cerebral tissue are no longer infectious and able to replicate after 24 hrs of storage under freezing at--20 degrees C. No intact bradyzoites could micromorphologically be demonstrated in the cysts. Clear changes in the structure and lesions of the cell walls and basic substance of the cysts, and of the bradyzoites are held responsible for the destruction of the parasites being surrounded by host tissue.
D000818:Animals; D001921:Brain / Q000382:microbiology; D003140:Communicable Disease Control; D005516:Food Microbiology; D005615:Freezing; D006801:Humans; D008460:Meat; D051379:Mice; D009024:Morphogenesis; D014122:Toxoplasma / Q000254:growth & development / Q000472:pathogenicity / Q000648:ultrastructure*; D014123:Toxoplasmosis / Q000517:prevention & control; D014124:Toxoplasmosis, Animal
Uber mikromorphologische Veränderungen an Bradyzoiten von Toxoplasma-Zysten im Hirngewebe nach Tiefgefrieren bei--20 degrees C.