Very active.
4.
483
In young cultures the forms found are usually oval, fusiform, or spindle-shaped. (Fig 4.5, 0.12.). In stained preparations, these show deep protoplasm beset with granules. The Nucleus is well defined and varies somewhat in position. It is usually more or less central with an inclination, in different parasites, towards the anterior or posterior extremity of the organism. The centrosome is always clear and stains very deeply. In practically all cases it is situated anteriorly, and in close apposition to the Nucleus. Springing from it the flagellum may be seen.
In certain instances the blepharoblast may be placed laterally or even posteriorly to the nucleus, but this is exceptional. (? Herpetomonas forms). By continued observation and in well-developed cultures, other forms are found which show the presence of a distinct undulating membrane. (Fig: 6.11.13, 0.14) These must be regarded as more or less adult forms of the parasite. They are actively motile, and vary much in size and shape. ...the...