[Report of the Medical Officer of Health for Wanstead and Woodford] page -

Wanstead and Woodford 1947

[Report of the Medical Officer of Health for Wanstead and Woodford]

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Table: As the sale by the local vendor of the product ceased it was not possible to make any further check.

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As the sale by the local vendor of the product ceased it was not possible to make any further check.

Nunber	Hot or cold mix	Local or outside manufacture	No. of colonies per ml. on Agar at 37deg. C. in 48 hrs.	Coliform test. Positive in 1/100 ml. in 3 tubes	Bact. coli. Present in 1/100 ml. in 3 tubes	Remarks by Public Health Laboratories	methylene blue reaction
Nunber	Hot or cold mix	Local or outside manufacture	No. of colonies per ml. on Agar at 37deg. C. in 48 hrs.	Coliform test. Positive in 1/100 ml. in 3 tubes	Bact. coli. Present in 1/100 ml. in 3 tubes	Remarks by Public Health Laboratories	Direct Decolourised in hours	After preincubation Decolourisec hours	Ministry s Provisiona Grading
1	—	Outside	300,000	3 in 3 tubes	0 in 3 tubes	Unsatisfactory sample containing excess number of bacteria.	3½	0	VI.
2	—	Outside	2 million	3 in 3 tubes	0 in 3 tubes	Unsatisfactory sample containing excess number of bacteria.	3½	½	VI.
3	Hot	Outside	3,300	0 in 3 tubes	0 in 3 tubes	Very satisfactory standard of bacterial purity.	4½	½	III.
4	Hot	Local	120,000	3 in 3 tubes	0 in 3 tubes	Passable standard of bacterial purity.	4½	½	III.
5	Hot	Outside	10,000	3 in 3 tubes	0 in 3 tubes	Satisfactory standard of bacterial purity.	4½	2½	II.
6	Hot	Local	250,000	3 in 3 tubes	0 in 3 tubes	Unsatisfactory, containing excessive number of organisms.	4½	0	IV.
7	—	Outside	50,000	3 in 3 tubes	0 in 3 tubes	Satisfactory standard of bacterial purity.	4½	4½	I.
8	Hot	Outside	150,000	3 in 3 tubes	0 in 3 tubes	Passable standard of bacterial purity.	4½	2½	III.
9	Hot	Local	12,000	3 in 3 tubes	0 in 3 tubes	Passable standard of bacterial purity.	4½	3	II.
10	Hot	Local	1 million	3 in 3 tubes	3 in 3 tubes	Unsatisfactory, contains excessive number of bacteria, including organisms of faecal origin.	4	0	IV.
11	Hot	Local	1,400	0 in 3 tubes	0 in 3 tubes	Very satisfactory sample of bacterial purity.	4½	1	III.
12	Hot	Outside	47,000	3 in 3 tubes	0 in 3 tubes	Satisfactory sample of bacterial purity.	4½	½	III.
13	Hot	Local	15,000	0 in 3 tubes	0 in 3 tubes	Passable standard of bacterial purity.	4½	3½	11.
14	Hot	Local	1,200	0 in 3 tubes	0 in 3 tubes	Very satisfactory standard of bacterial purity.	4½	4½	I.
15	Hot	Local	66,000	3 in 3 tubes	0 in 3 tubes	Satisfactory standard of bacterial purity.	4½	3	IT.
16	—	Outside	220,000	3 in 3 tubes	0 in 3 tubes	Unsatisfactory containing excessive number of bacteria.	4½	0	IV.
17	Hot	Local	9,000	3 in 3 tubes	0 in 3 tubes	Satisfactory standard of bacterial purity.	4½	1½	III.
18	Hot	Local	650,000	3 in 3 tubes	0 in 3 tubes	Unsatisfactory —excessive number of organisms and organisms of faecal origin in 1/10 ml.	4½	1	III.
19	Hot	Local	7,000	3 in 3 tubes	3 in 3 tubes	Unsatisfactory—contains organisms of faecal origin in 1/10 ml.	—	0	IV.
20	Hot	Local	1 million	3 in 3 tubes	3 in 3 tubes	Unsatisfactory — contains excessive bacteria and organisms of faecal origin.	—	0	IV.
21	Hot	Local	800	0 in 3 tubes	0 in 3 tubes	Excellent standard of bacterial purity.	—	3	II.
22	Hot	Outside	200,000	3 in 3 tubes	0 in 3 tubes	Passable standard of bacterial purity.	—	4	II
23	Hot	Local	280,000	3 in 3 tubes	3 in 3 tubes	Excessive bacteria coli. in less than 1/10 ml. indicating faecal contamination.	—	1½	III.
24	Hot	Local	120,000	3 in 3 tubes	3 in 3 tubes	Bact. coli. in less than 1/10 ml. indicating faecal contamination.	—	0	IV.
25	Hot	Outside	600,000	3 in 3 tubes	0 in 3 tubes	Unsatisfactory—excessive bacteria.	—	0	IV.