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A Bacteriological Analysis is now carried out weekly on samples of the milk supplied by the Dairy Farm to estimate its B. Coli Content.
5.--ANTI RABIC WORK.
The strains of fixed virus have been maintained during the year by regular passage through rabbits, and a sufficient supply of material is always kept in stock to treat twenty-four persons at any one time.
The number of patients treated was 55 as against 26 patients treated in 1923.
Twenty-five dogs' brains were examined for the presence of rabies, seven of these were positive, a slight increase over last year when of sixteen brains examined, five showed the presence of Negri bodies.
6.-CLINICAL EXAMINATIONS.
The number of examinations of various materials for diagnostic purposes carried out during the year was 7,438. The materials dealt with are given in detail in Table I attached.
These examinations are carried out on specimens sent to the Institute from the various Government Institutions and also from private medical practitioners.
7.-RIDEAL WALKER TEST FOR DISINFECTANTS.
Three examinations were made during the year on disinfectants supplied by Government Contractors.
8.-ANTI PLAGUE WORK.
A naked eye inspection is made daily of all rats sent to the Mortuary, 89,822 rats were inspected at the Victoria Mortuary during the year under review.
The number of microscopic examinations made was 3,618.
No cases of plague-infected rats were detected during the year.
9.- BACTERIOLOGICAL ANALYSES OF WATER SAMPLES.
The number of samples examined was 469, of these 460 were from water supplies in the Colony and nine were received from places abroad.