PMID: 9172830Jan 1, 1997Paper

Intraspecific variation in Cryptocaryon irritans

The Journal of Eukaryotic Microbiology
B K Diggles, R D Adlard

Abstract

Intraspecific variation in the ciliate Cryptocaryon irritans was examined using sequences of the first internal transcribed spacer region (ITS-1) of ribosomal DNA (rDNA) combined with developmental and morphological characters. Amplified rDNA sequences consisting of 151 bases of the flanking 18 S and 5.8 S regions, and the entire ITS-1 region (169 or 170 bases), were determined and compared for 16 isolates of C. irritans from Australia, Israel and the USA. There was one variable base between isolates in the 18 S region and 11 variable bases in the ITS-1 region. Despite their similar morphology, significant sequence variation (4.1% divergence) and developmental differences indicate that Australian C. irritans isolates from estuarine (Moreton Bay) and coral reef (Heron Island) environments are distinct. The Heron Island isolate was genetically closer to morphologically dissimilar isolates from Israel (1.8% divergence) and the USA (2.3% divergence) than it was to the Moreton Bay isolates. Three isolates maintained in our laboratory since February 1994 differed in sequence from earlier laboratory isolates (2.9% to 3.5% divergence), even though all were similar morphologically and originated from the same source. During this time th...Continue Reading

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Citations

Feb 27, 2007·Microbial Ecology·Thorsten StoeckWilhelm Foissner
Jun 9, 2011·Diseases of Aquatic Organisms·S M Picón-CamachoP Muñoz
Oct 12, 2005·Journal of Invertebrate Pathology·H J SmallG H Coombs
Mar 6, 2008·International Journal of Systematic and Evolutionary Microbiology·Thorsten StoeckJens Boenigk
Feb 11, 2012·Experimental Parasitology·Xiaohong HuangCheng Liu
Jan 31, 2006·The Journal of Eukaryotic Microbiology·Dana BarthThomas U Berendonk
Jun 11, 2002·The Journal of Parasitology·Karin D E EverettHarry W Dickerson
Aug 10, 2021·Ecology and Evolution·Sabine FlöderStefanie Moorthi

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