The malarial fevers, haemoglobinuric fever and the blood protozoa of man . val and later round in form, after which4 50 THE ETIOLOGY OF THE MALARIAL FEVERS. the microgametes or flagella are developed as in the other malarial plasmodia(see Fig. lo). Fresh Preparations.—The crescentic gametes of the aestivo-autumnalPlasmodia are developed within the red corpuscles and during their intra-corpuscular stage are distinguished from the schizonts by their limited amoeboidmotion, the early development of a greater amount of pigment within them,the crescentic or ovoid form acquired during the latter sta
The malarial fevers, haemoglobinuric fever and the blood protozoa of man . val and later round in form, after which4 50 THE ETIOLOGY OF THE MALARIAL FEVERS. the microgametes or flagella are developed as in the other malarial plasmodia(see Fig. lo). Fresh Preparations.—The crescentic gametes of the aestivo-autumnalPlasmodia are developed within the red corpuscles and during their intra-corpuscular stage are distinguished from the schizonts by their limited amoeboidmotion, the early development of a greater amount of pigment within them,the crescentic or ovoid form acquired during the latter stages of intracorpusculardevelopment, and their longer period of development. Their protoplasm ismore opaque and granular in appearance and the pigment is darker in before the gametes are liberated from the red corpuscles they have becomedefinitely crescentic in shape and may be differentiated into male and femaleforms. The red cell has shrunk about the parasite, forming a membrane-likecovering, one portion of which, that connecting the poles of the crescent,. Fig. io.—Tertian aestivo-autum^^aJ^J^ng form and microgametocyte.(Ovoid f^jaiirt^TC^hBto^^^sgraph X 1200. forms a hemispherical rtr0e^tian_r*ibi?««so-€alr^\bib of the crescent. Inthe youngest crescenticff(^Ws^theYpi^entispdisxfiftuted throughout the proto-plasm, but in the older Worms itbecomes collected fet the center or toward oneof the extremities. Tnfe border—&f**fee—crescen/f is sharply defined, beingrepresented by a single orSj^Me-^ fefraptive ^emline, often of a bright greencolor, due to the color of the reti~eorptrscle which forms an enveloping mem-brane. The pigment in the crescentic gametes is generally immotile, but in afew instances I have observed sluggish motility. The Macrogamete.—The macro gamete^ or female crescent, in bothspecies of aestivo-autumnal plasmodia, is distinguished from the microgame-tocyte, or male crescent, by its slender form, the arrangement of pigment, and thefact
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectb, booksubjectmalaria
