| a disease of freshwater fishes caused by tetrahymena corlissi thompson, 1955, and a key for identification of holotrich ciliates of freshwater fishes. | tetrahymena corlissi, a free-living protozoan, apparently caused the death of large number of guppies (poecilia reticulatus) and occasionally other fishes, in aquaria and hatcheries at several locations. apparently the disease occurs when the fish and protozoan populations are both at a high level of density. the signs include white spots and epidermal damage. histologically, t. corlissi could be seen in skin, muscle, and viscera; in some there was marked inflammation, in others there was little ... | 1975 | 805228 |
| cell size and proportional distance assessment during determination of organelle position in the cortex of the ciliate tetrahymena. | developing oral organelles of dividing tetrahymena corlissi appear to be positioned by mechanisms which assess distances as a proportion of the organism's overall dimensions. in some respects, the cortex of this protozoan obeys the 'french flag' rule formulated by wolpert for describing regulation of spatial proportions during differentiation of metazoan embryos. dividing tetrahymena of markedly different sizes occur when division is synchronized by starvation and refeeding. at the start of cell ... | 1976 | 932110 |
| phylogeny of the fish parasite ichthyophthirius and its relatives ophryoglena and tetrahymena (ciliophora, hymenostomatia) inferred from 18s ribosomal rna sequences. | phylogenetic relationships within the subclass hymenostomatia were inferred from the comparisons of three new ssrrna gene sequences from ichthyophthirius multifiliis (1,751 bp), ophryoglena catenula (1,748 bp), and tetrahymena corlissi (1,753 bp). using maximum-parsimony and distance-matrix methods, ichthyophthirius and ophryoglena were consistently paired and formed a sister group to the tetrahymenines, consistent with their placement in the ophryoglenina. tetrahymenids formed a monophyletic gr ... | 1995 | 7700154 |
| parasitic infections in live freshwater tropical fishes imported to korea. | we examined 15 species of ornamental tropical fishes originating from southeast asia to determine the cause of losses among 8 fish farms in korea. a total of 351 individuals belonging to 5 different families (1 species of characidae, 6 of cichlidae, 3 of cyprinidae, 1 of heleostomatidae, and 4 of poecilidae) were collected for the purpose of detecting metazoan and protozoan parasites. parasites were fixed and stained using routine methods, and identified. we found 3 ciliates, 2 monogeneans, 1 ne ... | 2002 | 12542094 |
| parasitic infections in freshwater ornamental fish in sri lanka. | a total of 1520 ornamental fish of 13 species from 26 export farms in sri lanka were collected between october 1999 and march 2000 and examined for parasites. fish species examined were guppy poecilia reticulata, goldfish carassius auratus, platy xiphophorus maculatus, molly poecilia sphenops, angel pterophyllum scalare, swordtail xiphophorus helleri, tetras hyphessobrycon species, barbs capeota and puntius spp., gourami colisa sp., carp cyprinus carpio, fighters betta spelendens and others (bra ... | 2003 | 12747641 |
| reponses of sheep to a vaccination of entodinial or mixed rumen protozoal antigens to reduce rumen protozoal numbers. | two rumen protozoa vaccine formulations containing either whole fixed entodinium or mixed rumen protozoa cells were tested on merino sheep with the aim of decreasing the number and/or activity of protozoa in the rumen. negative control (no antigen) and positive control (tetrahymena corlissi antigens) treatments were also included in the experiment. blood and saliva were sampled to measure the specific immune response. protozoal numbers in the rumen were monitored by microscopic counts. vaccinati ... | 2008 | 17697432 |
| some but not all tetrahymena species destroy monolayer cultures of cells from a wide range of tissues and species. | the activities of tetrahymena corlissi, tetrahymena thermophila, and tetrahymena canadensis were studied in coculture with cell lines of insects, fish, amphibians, and mammals. these ciliates remained viable regardless of the animal cell line partner. all three species could engulf animal cells in suspension. however, if the animal cells were monolayer cultures, the monolayers were obliterated by t. corlissi and t. thermophila. both fibroblast and epithelial monolayers were destroyed but the des ... | 2017 | 25733238 |
| histopathological study on parasites in freshwater ornamental fishes in iran. | during march 2012 through february 2013, 100 freshwater ornamental fishes in 22 species from some aquarium fish shops were examined. specimens were dissected and tissue samples consisted of liver, kidney, spleen, heart, intestine, ovary, brain and eye were fixed in 10 % buffered formalin and sections were provided and stained with hematoxylin and eosin, periodic acid-schiff, giemsa and acid-fast staining (ziehl-neelsen). at present study six species of protozoans consisting of eimeria spp. crypt ... | 2016 | 27605779 |
| sterol requirements of a ciliate tetrahymena corlissi th-x. i. a nutritional analysis of the sterol requirements of t. corlissi th-x. ii. metabolism of tritiated lopohenol in t. corlissi th-x. | | 1961 | 13715593 |