. The practical study of malaria and other blood parasites. Malaria; Mosquitoes; Trypanosoma; Blood. 325 Genus Haemogregarina* The haemogregarines are unpigmented uni- cellular organisms, which, at one stage of their development, have a worm-like form. They occur as endoglobular parasites, and also as free forms in the plasma. I'he vermicule stage may be both endoglobular and free. ,The sexual and asexual cycles occur, as far as is known, in the same host. They occur in fish, amphibians, and reptiles, but not in mammals, and, unlike the gregarines, not in invertebrates. They are, so far as is
. The practical study of malaria and other blood parasites. Malaria; Mosquitoes; Trypanosoma; Blood. 325 Genus Haemogregarina* The haemogregarines are unpigmented uni- cellular organisms, which, at one stage of their development, have a worm-like form. They occur as endoglobular parasites, and also as free forms in the plasma. I'he vermicule stage may be both endoglobular and free. ,The sexual and asexual cycles occur, as far as is known, in the same host. They occur in fish, amphibians, and reptiles, but not in mammals, and, unlike the gregarines, not in invertebrates. They are, so far as is known, non-pathogenic, and they cannot be transmitted by inoculation from one animal to another. The cycle of development, as far as it is known, will be described under the various Fig. 70. H. vanarum {or Drepanidium ranavum) young form, Gametes jree in the Plasma, and Fission forms in Spleen. {Partly after Minchin) I. H. ranarum (= Lankesterella vanarum). Found in the blood of Rana esculenta (edible frog). This species includes, according to Laveran, two species, H. prtnceps and H. monilts, described by Labbe. Here, as in other species of Note,—Ample material for the study of these parasites is readily obtainable in the tropics. Frogs, toads, lizards, snakes, tortoises, etc., are commonly infected. Examine especially the liver and internal organs for developmental forms. Examine carefully for ticks, lice, etc, and possible cycles in these. Preserve all ecto parasites in spirit for subsequent 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 Stephens, John William Watson, 1865-; Christophers, S. R. (Samuel Rickard), 1873-; Liverpool School of Tropical Medicine. London, Pub. for the Univ. Press of Liverpool by Williams & Norgate
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