. Sanitary entomology; the entomology of disease, hygiene and sanitation. sciata) on sores, and demonstrated in themosquitoes the flagellate forms of the parasite up to 48 hours, but histransmission experiments failed. He later (1911b) succeeded in gettingthis mosquito to take up the parasites and demonstrated developmentalstages in the gut. No evidence of infection could be found in experimentswith Culex quimquefasciatus (fatigans). Leptomonas algeriense Sergent and Sergent (1906) is parasitic inCulex pipiens and Aedes argenteus (calopus). 252 SANITARY ENTOMOLOGY Leptomonas cvlicis (Novy, Mac
. Sanitary entomology; the entomology of disease, hygiene and sanitation. sciata) on sores, and demonstrated in themosquitoes the flagellate forms of the parasite up to 48 hours, but histransmission experiments failed. He later (1911b) succeeded in gettingthis mosquito to take up the parasites and demonstrated developmentalstages in the gut. No evidence of infection could be found in experimentswith Culex quimquefasciatus (fatigans). Leptomonas algeriense Sergent and Sergent (1906) is parasitic inCulex pipiens and Aedes argenteus (calopus). 252 SANITARY ENTOMOLOGY Leptomonas cvlicis (Novy, MacNeal, and Torrv, 1907) is native toCulex pipiens and Culex qninquefasciotus (fatigans). Fantham and Por-ter (1915, 1916) fatally infected birds by feeding them on infected in-sects, proving it experimentally pathogenic to Passer domesticus andChelidon urbica. Mastigophora: Binucleata: Plasmodidae The Plasmodiums are the causative organisms of malaria, wliich are allcarried by the bite of mosquitoes. The cycle of schizogony occurs in man. Host I (Man) Host K (Mos«uiTo). I Cycle of Schizogony Cycle of SpoR0QO^Jv? In Homo Sapiens (Man/. InAmopheles OPR LIFE CYCLE OF PLASMODIUM The Cause of Pernicious 47. (Pierce.) and of sporogeny in the mosquito (fig. 47). This life cycle is very clearlyset forth in many textbooks and should be studied carefully by all stu-dents. Briefly it takes place as follows, starting with the minute sporo-zoite inoculated in man by the mosquito. This sporozoite is an elongatesickle-shaped body which bores into a red blood cell, and there fomtis anamoeboid shaped body known as tlie trophozoite, which gives off pseudo-podia that absorb nourishment from tlie cell. At first this trophozoiteis of uniform mass, but soon a vacuole is formed, and it may assume aring form. The trophozoite grows, withdraws its pseudopodia and be-comes a schizont. This divides into many merozoites, which burst thecell and escape into the blood stream. Tiiis completes the
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbenefic, bookyear1921
