Abstract
WE understand that Sir Ronald Ross is engaged at the Ministry of Pensions in the investigation of Giardi intestinalis, often known as Lamblia intestinalis, which, of the three or four common flagellates inhabiting the intestine of man, has the greatest claim to pathogenicity. Moreover, it differs from the others in being an inhabitant of the duodenum and upper part of the small intestine instead of the large intestine. It is probably the first parasitic protozoan to have been observed, for, as Dobeli has pointed out, the famous Dutch observer Leeuwenhoek saw it in his own stools so long ago as 1681. From that time down to the present day there has been much controversy as to the significance of its presence in the human intestine. Some regard it as a definitely harmful organism, while others believe that it does not damage its host in any way.
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An Intestinal Parasite of Man. Nature 111, 379 (1923). https://doi.org/10.1038/111379b0
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DOI: https://doi.org/10.1038/111379b0