. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . J HSPOROZOA-INTRACELLULAR, PRODUCING MANY SPORES »«*» 6. A. W. WILLIAMS, DEL. PROTOZOA 47 of the daughter organisms are usually formed anew. Multiple divisionis also observed. In the second case the flagellata may or may notconjugate before they encyst. Then they divide within the cyst. The sexual cycle varies much in different species. Isogamy hasbeen noticed between fully grown individuals as well as between smallerforms. The union of different-sized forms, or anisogamy, has also beenobserved. Al
. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . J HSPOROZOA-INTRACELLULAR, PRODUCING MANY SPORES »«*» 6. A. W. WILLIAMS, DEL. PROTOZOA 47 of the daughter organisms are usually formed anew. Multiple divisionis also observed. In the second case the flagellata may or may notconjugate before they encyst. Then they divide within the cyst. The sexual cycle varies much in different species. Isogamy hasbeen noticed between fully grown individuals as well as between smallerforms. The union of different-sized forms, or anisogamy, has also beenobserved. Also autogamy is said not to be infrequent. It is claimedthat certain of the flagellates pathogenic for man require a second hostfor the development of their sexual cycle. The flagellates are subdivided into several orders, in only two ofwhich are forms found which are pathogenic for man. (See Part II.)The different types of pathogenic flagellates are shown in Plate IV, i,Figs. 1-4. Among the most important pathogenic forms are thetrypanosomes. Trypanosoma.—^The name trypanosoma (boring animal) was givenby Gruby, in 1843, to certain free-swimming
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