49
TRICHINOPOLY.
WATER SAMPLES COLLECTED ON 19TH AND 20TH APRIL 1912.
Remarks .—The river Cauvery was dry when samples were taken. The supply is intermittent
There was no rain since last analysis.
Bacteriological Analyses.
SAMPLE I.—FIRST TAP IN HEAD WORKS OF THE INFILTRATION
GALLERY.
Total colonies per cc. on agar at 37° C.—Countless.
Nu mb e r .
Lact os e.
Sacch
a r o s e . D u l c i t e . Adoni t e . I nul i ne .
V o g e s a n d P r o s k .
Indol.
o t i l i t y .
Group.
Name of bacilli.
Group and
Remarks.
Bile salt lactose, medium.
+
-
1 tube of 20 cc.
...
...
...
...
1
...
1 + +
-
- - - + - IV B. Coscoroba
... Group I, nil.
2 tubes of 10 cc.
...
...
...
...
2
2 + + - - - - + - IV
Do.
...
"
II, nil.
3
"
5 cc.
...
...
...
3
...
3 + + - - - - + -
IV
Do.
...
„
III, nil.
3
"
1 cc.
...
...
...
...
3
4 + + - - - - + - IV
Do.
...
,,
IV, 10.
3
„
.1 cc.
...
...
...
...
... .
..
3
5 + + - - - - + - IV
Do.
3
„
.01 cc.
...
...
...
. . . ...
3
6 + + - - - - + -
IV
Do.
7 + + - - - - +. - IV
Do.
Fœcal bacilli in 5 cc. and upwards.
No vibrios in 100 cc.
8 + + - - - - + - IV
Do.
... Class I, nil.
9 + + - - - - + -
IV
Do.
...
„
II, 10.
10 + + - - - - + - IV
Do.
...
„ III, nil .
SAMPLE II—FIRST TAP AFTER SERVICE RESERVOIR
Total colonies per cc. on agar at 37° C.—Countless.
1 + + + + - + - - III B. 67
..
... Group
I, nil.
2 + + + + - + - - III
Do.
...
II, nil.
3 + + + + - + - - III
Do.
..
...
„
III, 9.
4 + + + + - + - - III
Do.
...
„
IV, 1.
5 + + + + - + - - III
Do.
Bile salt lactose, medium.
+
-
6 + + + + - + - - III
Do.
7 + + + + - + - - III
Do.
8 + + + + - + - - III
Do.
...
... Class I, nil.
1 tube of 20 cc.
...
...
...
...
1
...
9 + + - + - + - - IV B. Lactis ærogenes ...
„
II, 10.
10 + + + + - + - - III B. 67
...
...
„
III, nil.
2 tubes of 10 co.
...
...
...
2
...
3
„
5 cc.
...
...
...
...
3
...
3
"
1. cc. ... ...
1
2
3
„
.1. cc.
...
...
...
1
2
3
„ .01 cc.
...
..
...
...
...
3
Fœcal bacilli in 5 cc. and upwards.
No vibrios in 100 cc.
SAMPLE III.—TAP NEAR CANTONMENT RAILWAY STATION.
Total colonies per cc. on agar at 37° C.—Cannot be counted.
1 + + - -
- + - IV I B. Coscoroba
... Group I, nil.
2 + + - - - - + - IV
Do.
. .
,,
II, nil.
3 + + - + - - - - IV B. Gasoformans
...
III, nil.
4 + + - -
- + - IV B. Coscoroba...
,,
,, IV, 10.
5 + + - - - - + - IV
Do.
6 + + - - - - + - IV
Do.
Bile salt lactose, medium.
+
-
7 + + - - - - + - IV
Do.
8 + + - - - - + - IV
Do.
... Class
I, nil.
9 + + - - - - + - IV
Do.
II, 10.
1
.
cc
. ... ...
1
....
.
20
of
tube
1
.. 6
10 + + - + - - - - IV B. Gasoformans
...
„
III, nil.
2tubes of 10 cc.
...
...
...
2
3
"
5 cc.
...
...
3
...
3
", 1 cc. . . . ... ... .. .
1
2
3
„
.1 cc.
...
...
...
...
1
2
3
„
.01 cc.
...
...
...
3
Fœcal bacilli in 5 cc. and upwards.
No vibrios in 100 cc.
REPORT.
The samples are all very similar and show one bad feature, the high total count. This is not an unusual
feature, though, in view of the effective action of the Infiltration Gallery, it is not easy to account for. It will
be noted that the bad results shown last year at this season and. ascribed to the repairs then being carried out
to the Infiltration Gallery do not reappear. Chemically the water is much as usual and, though inclining to
be hard, quite above the average.
1 .1