PMID: 1195157Nov 1, 1975Paper

Fine structure of the oocyst walls of Isospora serini and Isospora canaria and excystation of Isospora serini from the canary, Serinus canarius L

The Journal of protozoology
C A Speer, D W Duszynski

Abstract

Oocysts of Isospora serini and Isospora canaria, from the canary Serinus canarius, were broken, added to a cell suspension, fixed in Karnovsky's fluid, and studied in the electron microscope. The oocyst wall of each species had an electron-lucent inner layer, a more osmiophilic middle layer and an outer layer of electron-lucent (I. serini) or electron-dense material interspersed with some electron-lucent material (I. canaria). A few, relatively large lipid-like bodies were present in the outer or middle layer of the oocyst wall of I. canaria. As many as 9 membranes were present in the oocyst wall of I. canaria and 3 in that of I. serini. When exposed to a trypsin-sodium taurocholate fluid, sporozoites of I. serini excysted from 5-month-old sporocysts in vitro, but not from sporocysts stored for more than 6 months. No excystation occurred in 15-month-old I. canaria sporocysts. Similarities and differences in excystation between I. serini and other Isospora, Eimeria, and Sarcocystis species are discussed.

Citations

Sep 1, 1979·Zeitschrift Für Parasitenkunde·C A SpeerD W Duszynski
Jan 1, 1983·Zeitschrift Für Parasitenkunde·D S LindsayJ V Ernst
Aug 1, 1980·Parasitology·R M Pittilo, S J Ball
Aug 1, 1978·The Journal of protozoology·D W DuszynskiG A Castro
Nov 1, 1978·The Journal of protozoology·A A MarchiondoC A Speer
Nov 1, 1978·The Journal of protozoology·E ChristieJ P Dubey
Nov 1, 1984·The Journal of protozoology·P L Long, L P Joyner
Jul 25, 2006·Trends in Parasitology·Sabina I BelliDavid J P Ferguson
Oct 1, 1979·Acta Pathologica Et Microbiologica Scandinavica. Section B, Microbiology·D J FergusonW M Hutchison
Jun 1, 1979·Acta Pathologica Et Microbiologica Scandinavica. Section B, Microbiology·D J FergusonW M Hutchison
Jun 1, 1977·Acta Pathologica Et Microbiologica Scandinavica. Section B, Microbiology·D J FergusonJ C Siim

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