Results of the Bacteriological Examination of the Kowloon Water Supplies for the year 1922.
MacConkey's Lactose Neutral Red Bile Salt Peptone Water.
Sample Date Rate of Filtration Total Colonies on Agar in 1cc at 37°C 1 c.c. 2 c.c. 5 c.c. 10 c.c. 20 c.c. 50 c.c. Presence of the Coli group Unfiltered 9-1-22 316 Filtered 9-1-22 271 ... Unfiltered 6-2-22 90 Filtered 6-2-22 ... Unfiltered 13-3-22 53 Filtered 13-3-22 7 Unfiltered 3-4-22 60 Filtered 3-4-22 16 Unfiltered 1-5-22 70 Filtered 1-5-22 3 Unfiltered 6-6-22 50 Filtered 6-6-22 16 Unfiltered 3-7-22 317 Filtered 3-7-22 13 Unfiltered 8-8-22 800 Filtered 8-8-22 40 Unfiltered 4-9-22 203 Filtered 4-9-22 18 Unfiltered 2-10-22 23 Filtered 2-10-22 5 Unfiltered 1-11-22 280 Filtered 1-11-22 36 Unfiltered 4-12-22 130 Filtered 4-12-22 9The rate of filtration is given by the Water Authority in gallons per square yard per day. Classification of the Coli group is that of MacConkey, + = Acid and Gas, 1 = Acid only, No Change.
1 c.c. 2 c.c. 5 c.c. 10 c.c. 20 c.c. 50 c.c. Presence of the Coli group + + + + + + Group IV in 5 c.c. Absent in 50 c.c. Group I. +1 + + + + + Group IV in 1 c.c. Negative up to 50 c.c. Group IV. + + + + + + Group I. + + + + + + No. B. Coli found in 5 c.c. Negative up to 50 c.c. + + + + + + Group IV in Group I in 1 c.c. Group IV. + + + + + + in 5 c.c. Group II. in 10 c.c Group I. Negative up to 50 c.c. + + + + + + Negative up to 50 c.c. + + + + + + Group IV in 50 c.c. Group IV is 50 c.c. + + + + + + Group II.F
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