c
TABLE V. COMPARISON OF THE STIMULATORY EFFECTS OF UNTREATED PLASMA OF SEVEN SPECIES OF MOLLUSCS ON CYST
FORMATION OF Himasthla quissetensis
(After Cheng et al., 1966b.)
z z
M
Molluscan
species
No. of
specimens
pooled
Size of
molluscs
(length
of shell
in cm)
T . philippinarum
M . demissus
M . edulis
M . mercenaria
M . arenaria
C . virginica
c. gigas
5.1-5.8
7.4
4.7-6.5
6.5-7.2
4.1-5.2
7’0-12.0
12.1-14.0
Plasma
protein
Plasma
C O n C n
P H
(g/100 m u
1.95
6.55
1.85
6.65
1.80
7.31
2.05
7.40
2.05
6.70
2.25
6.35
2.00
6.51
No.
trials
of
No. of
cercariae
used
in each
trial
Mean time at
which 5004 of
cercariae encysted (min
after contact)
70
50
52
20
100
46
20
16 f 3.2
40 & 2.5
30 & 3.0
53
4.2
12 & 2.5
21 * 3.4
9 & 2.5