| carotenoid pigment in spirobacillus cienkowskii metchnikoff, a pathogen of cladocera. | | 1959 | 13622695 |
| phylogenetic characterization and prevalence of "spirobacillus cienkowskii," a red-pigmented, spiral-shaped bacterial pathogen of freshwater daphnia species. | microscopic examination of the hemolymph from diseased daphniids in 17 lakes in southwestern michigan and five rock pools in southern finland revealed the presence of tightly coiled bacteria that bore striking similarities to the drawings of a morphologically unique pathogen, "spirobacillus cienkowskii," first described by elya metchnikoff more than 100 years ago. the uncultivated microbe was identified as a deeply branching member of the deltaproteobacteria through phylogenetic analyses of two ... | 2008 | 18192404 |
| selective predation and rapid evolution can jointly dampen effects of virulent parasites on daphnia populations. | parasites are ubiquitous and often highly virulent, yet clear examples of parasite-driven changes in host density in natural populations are surprisingly scarce. here, we illustrate an example of this phenomenon and offer a theoretically reasonable resolution. we document the effects of two parasites, the bacterium spirobacillus cienkowskii and the yeast metschnikowia bicuspidata, on a common freshwater invertebrate, daphnia dentifera. we show that while both parasites were quite virulent to ind ... | 2008 | 18260781 |
| complex array of endobionts in petalomonas sphagnophila, a large heterotrophic euglenid protist from sphagnum-dominated peatlands. | petalomonas sphagnophila is a poorly studied plastid-lacking euglenid flagellate living in sphagnum-dominated peatlands. here we present a broad-ranging microscopic, molecular and microspectrophotometric analysis of uncultured p. sphagnophila collected from four field locations in nova scotia, canada. consistent with its morphological characteristics, 18s ribosomal dna (rdna) phylogenies indicate that p. sphagnophila is specifically related to petalomonas cantuscygni, the only other petalomonas ... | 2010 | 20376101 |