. Annals of tropical medicine and parasitology. Parasites. Text-Fig?. 19-22.—Stages in ingestion of bacillus as food All the bacteria which are propelled towards the cytostome by the anterior flagellum are not ingested, but the organism seems to have a special liking for certain bacteria. This was well illustrated in one case w^here a small oval flagellate attempted to swallow a strepto-bacillus which was longer than itself, but finding, after most of the bacillus was swallowed, that it was impossible to swallow all of it, the organism disgorged the bacillus again. This same bacillus was immed
. Annals of tropical medicine and parasitology. Parasites. Text-Fig?. 19-22.—Stages in ingestion of bacillus as food All the bacteria which are propelled towards the cytostome by the anterior flagellum are not ingested, but the organism seems to have a special liking for certain bacteria. This was well illustrated in one case w^here a small oval flagellate attempted to swallow a strepto-bacillus which was longer than itself, but finding, after most of the bacillus was swallowed, that it was impossible to swallow all of it, the organism disgorged the bacillus again. This same bacillus was immediately attacked by another organism with a similar result, and the same performance was gone through by at least twelve separate protozoa, all of which made unsuccessful attempts to swallow it. Sometimes two flagellates started at opposite ends of this bacillus at the same time and tried to swallow- it. This preference for special bacteria is also shown by the way these flagellates in fresh preparations tend to accumulate around certain clumps of bacteria, while other clumps are untouched. In stained preparations the ingested bacteria are seen to be contained in vacuoles, and to be in various stages of digestion. (3) Excretion. When living specimens are examined, the food vacuoles are seen to accumulate at the posterior end of the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Liverpool School of Tropical Medicine. Liverpool University Press [etc. ]
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectparasites, bookyear19
