Various instances of the formation of a chitinous capsule around parasites in mosquitos have been described in literature. Worms as well as Protozoa, Hyphomycetes and bacilli have been seen encapsuled in this way.
The material, upon which these observations were made is contained in the collection of the “Centraal Militair Geneeskundig Laboratorium” in Weltevreden (Java). To complete my observations many specimens in the collection of the British Museum were studied and compared.
This amoeba was found in the large intestine of a Macacus cynomolgus, that was killed because it suffered from paralysis of the hind legs and emaciation. The autopsy showed these symptoms to be dependent on a general tuberculosis, in which, besides many other organs, the spinal matter was involved. Microscopic examination of the intestinal contents revealed the presence of motile amoebae and cysts. Except some small tubercular foci in the serosa no pathological lesions could be detected in the intestine. Close examination of the mucosa failed to reveal any ulceration; blood and mucus were totally absent.
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