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79

ISTICS OF THE VARIOUS MALARIA PARASITES

Mannaberg)

Number
of
merozoites		Form
of
gametocyte		Alterations
in the infected
blood-corpuscles		Relative number
of parasites
seen in
peripheral
and visceral
blood
espectively		Influence
of
quinine		Liability to
reappearance
of parasite
after leaving
infective
regions
6-12A sphereThe red blood corpuscles are little discoloured, and are not materially altered in size; some appear smallerParasites seen in peripheral circulation throughout the whole cycle, and in as great numbers as in visceral bloodCauses disappearance of parasite readilyLiability persists for a very long period.
15-20 (often less)A sphereThe red blood corpuscles are often hypertrophied, and lose colour, it may be completely. Schüffner's dots in deeply stained specimensParasites seen in peripheral blood throughout the whole cycle, but not in such large numbers as in visceral bloodCauses disappearance of parasite readilyLiability persists for long period.
6-8 (even more)A crescent (?)The red blood-corpuscles shrink often, and are then either darker-stained (copper colour) or may be completely decolorizedAn enormously greater number of parasites present in internal organs as compared with peripheral blood The latter part of the cycle takes place in internal organs onlyCauses disappearance of parasite less readilyAfter a few months, less liability to recurrence.
6-8A crescent (?)The red blood-corpuscles shrink frequently, and are darkDittoDittoDitto.
10-12, rarely 15-16A crescentThe red blood-corpuscles shrink frequently; they are dark, or may be perfectly colourlessDittoDittoDitto
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