215
GUDIYATTAM.
WATER SAMPLES TAKEN-21sT DECEMBER 1910.
REMARKS.—There was a small flow of water in the Koundanya river when samples were taken. There has been about 16 .22 inches
of rain since last analysis. The supply is constant.
Bcteriological Analyses.
SAMPLE I.—TAP ADJOINING THE SERVICE RESERVOIR.
Total colonies per co. on agar at 37° 0- 108
C o l o n y n u m b e r
L a c t o s e .
S a c c h a r o s e .
D u l c i t e .
A d o n i t e .
I n u l i n .
V o g e s a n d P r o s k .
I n d o l .
M o t i l i t y .
G r o u p .
Name of Bacilli.
G r o u p a n d
Remarks.
Bile salt lactose, medium.
+
–
1 tube of 20 cc. ..
..
1
..
1 +
–
--
– – –
+
–
I B. Vesicu
losus
.. Group 1, 10.
2
+ – – – – –
+
–
I
Do.
..
„ II, nil.
2 tubes of 10 cc...
..
..
..
..
2
3
„
5 cc. ..
3
. .
3
+
–
– – –
– + – I Do.
..
„ III, nil.
4 +
– – – –
–
+
–
I
Do.
..
„ IV, nil.
3 „ 1 cc.
..
3
.
3 " .1 cc.
3
5 +
_ _ _ _ _ + _
I
Do.
6 +
– – _ _
_
+
_
I
Do.
3
„
.01 cc. .. . . .. .. ..
..
3
7
+ _ _ _ _
_
+
_
I
Do.
.. Class I, nil ,
Fœcal bacilli m 1 cc. and upwards
No vibrios in 100 cc.
8 +
_ _ _ _
_ + _
I
Do.
„ II,
nil.
9
+ _ _ _ _ _ + _
I
Do.
.
„ III, 10.
10 +
_ _ _ _ _
+
_
I
Do.
1 + +
_ + _ + _ _
IV B. Lactis ærogenes
Group I, nil.
SAMPLE II.—TAP NEAR MUHAMMADAN SCHOOL.
Total colonies per cc. on agar at 37° C—Countless.
2
+ +
_ + _
+ _ _
I V Do.
„ II, nil.
3
+
+
_
+
_
+
_ _
IV
Do.
„ III, nil.
4
+ + _ + _
+ _ _
IV
Do.
„ IV, 10.
5 + +
_ + _ + _ _
IV
Do.
Bile salt lactose, medium.
+
6 +
+ _ + _
+ _ _
IV
Do.
.
7 +
+ _ + _
+ _ _
IV
Do.
8 + + _ + _
+ _ _
IV
Do.
Class 1, nil.
1 tube of 20 cc ..
1
..
9 + + _ + _
+ _ _
1V
Do.
„ II, 10.
10
+
+
_
+ _
+
_
_
1V
Do.
„ III, nil.
2 tubes of 10 co. ..
..
..
..
2
3
5 cc. ..
..
..
..
..
3
. .
3 „
1 c c .
. .
. .
. .
. .
. .
3
. .
3
.1 oc. ..
3
3 „
.01 cc. ..
..
..
..
..
..
3
Fœcal bacilli in 1 cc. and upwards.
No vibrios in 100 cc.
SAMPLE III.—TAP IN FRONT OP TRAVELLERS' BUNGALOW.
Total colonies per cc. on agar at 37° C—1,110.
1
+
+ _
+
_ + _ _
IV B. Lactis ærogenes.
Group I, nil.
2
+ + _ + _ _
+ _ _
IV
Do.
„
II, nil.
3
+ + _ + _
+ _ _
IV
Do.
„ III, nil.
4
+ + _ + _
+ _ _
I V Do.
„ IV, 10.
Bile salt lactose, medium.
+
—
5
+ + _ + _
+ _ _
IV
Do.
6
+ + _ + _
+ _ _
IV
Do.
1 tube of 20 cc. ..
..
..
..
..
1
..
7
+ +
+ _
+
_
IV
Do.
8
+ + _ + _
+ _ _
IV
Do.
Class I, nil .
2 tubes of 10 cc. ..
..
2
..
9
+ + _ + _
+ _ _ I V
Do.
„
II,, 10.
3
3 „ 5 cc.
3
. .
10
+
+ _ + _
+ _ _
I V Do.
„ III, nil.
3 „ 1 cc.
3
. .
3 „ .1 cc.
2
1
3 ,,
.01 cc. . .
..
..
..
1
2
Fœtal bacilli in .1 cc. and upwards.
No vibrios in 100 cc.
REPORT.
On the whole the results got on this occasion compare favourably with those got previously. The water
taken from the tap adjoining the service reservoir can be said to be in a fairly satisfactory condition. The
total count is low, the number of fœcal germs moderate, and these are all of a most resistant kind. The
samples from the distributary system give progressively worse results ; high total counts the foetal germs of
a less resistant type and more of them. It has often been noticed previously that the relatively good water
of the eadworks suffers deterioration by passage through the pipes. It is satisfactory to note that the
dangerouspollution of the water of the service reservoir is no longer in evidence.
Chemically the water is only medium in quality. It is rather hard and the organic matter which is
chiefly of animal origin is on the high side. There is a steady improvement in the item oxidised nitrogen
which seems to point to the more distant sources of the water supply becoming cleansed. When first
examined this figure was thirty times higher than it is at present. It would form a notable advance if the
evidences of recent pollution could be correspondingly reduced.