. Flies in relation to disease: bloodsucking flies. Flies; Flies as carriers of disease; Diptera. '^^1 LIFE-CYCLE OF MALARIAL PARASITE I35 and remain slightly connected together by means of cytoplasmic processes. After the formation of the sporoblasts a certain amount of protoplasm is left over, containing all the waste products and also some of the pigment granules originally present in the macrogamete. The nucleus of each sporoblast now divides into a large number of smaller ones which become arranged around the periphery. The surface of the sporoblast then exhibits a number of cytoplasmic p
. Flies in relation to disease: bloodsucking flies. Flies; Flies as carriers of disease; Diptera. '^^1 LIFE-CYCLE OF MALARIAL PARASITE I35 and remain slightly connected together by means of cytoplasmic processes. After the formation of the sporoblasts a certain amount of protoplasm is left over, containing all the waste products and also some of the pigment granules originally present in the macrogamete. The nucleus of each sporoblast now divides into a large number of smaller ones which become arranged around the periphery. The surface of the sporoblast then exhibits a number of cytoplasmic projections, each of which increases in length and takes with it a daughter-nucleus. Eventually the spindle- shaped process, with its contained nucleus, becomes free from. Fig. 41. Photomicrograph of sporozoites of malaria from the salivary glands of Anopheles (Py/etophnnts) costalis. X about 1000. After Hill and Haj'don. the mother sporoblast, and is then known as the sporozoite. Each sporoblast produces large numbers of these bodies, but a certain amount of protoplasm containing waste products is always left unused in their formation. The oocyst, which con- tains the whole of the sporozoites derived from the many sporoblasts, and by this time has increased enormously in size, eventually bursts, and the sporozoites are set free in the body- cavity of the mosquito. As the coelomic fluid bathes all the organs of the mosquito, the sporozoites are brought in contact with all parts of the body. They appear to have a predilection for the salivary glands and the majority bore their way into. 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 Hindle, Edward, 1886-. Cambridge, University Press
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjectdiptera
