K 65
Annexe L.
BACTERIOLOGICAL INSTITUTE.
REPORT BY DR. E. A. SHAW, R.N., Acting Bacteriologist.
Staff.
Early in June, 1909, owing to the most unfortunate death of Dr. W. Hunter, the then Government Bacteriologist, my services were asked for to carry on his duties until the arrival in the Colony of the officer appointed to permanently succeed him. It thus falls to my lot to prepare this report for the year 1909, which is based in part on records left by Dr. Hunter, and by Dr. C. M. Heanley whose appointment as Assistant Bacteriologist terminated on April 4th. The newly appointed Bacteriological Assistant, Mr. Chan Tsun-kon, who commenced duty on 5th April, is showing very considerable aptitude for his work, and bids fair to thoroughly justify his selection for the post he occupies.
Buildings.
These have been maintained in good repair. During the Summer, I had the whole of the micro-photographic apparatus, which was placed in the upper storey of the Institute where its efficiency was much interfered with by its susceptibility to vibration, and consequent blurring of photographic plates, transferred to the basement where it now stands on a concrete floor, is much more steady and correspondingly increased in efficiency.
The Preparation of Vaccine Lymph.
On taking over the duties at the Institute in June, 1909, I found the prepared vaccine lymph was being stored in chambers cooled to a constant temperature of 65° F. Finding that from time to time, many tubes of lymph had to be rejected because of an obvious growth of contamination in them, and further finding on microscopical examination that this was fungoid in nature, for the growth of which 65° F. was a most favourable temperature, I determined to store the lymph at a temperature of 40° F. This answered admirably, and it is now very rarely necessary to reject a tube of lymph for the above mentioned reason; moreover the duration of potency of the lymph is by this procedure greatly prolonged; to as much as six months certainly in the case of lymph prepared in the hot weather and reported on by various vaccinators just recently.
In every case the lymph used for vaccinating the calves has been first intensified by passing through rabbits, which is found to greatly increase the potency of the final product.
In August specimens of calf vaccine (a.) dried, and (b.) lanolinated, and intended for tropical use, were received for examination and report from the Lister Institute, these were tested by myself on rabbits and by Dr. J. C. Thomson at Victoria Gaol on cases requiring vaccination, but neither was found by either of us to be as efficient as that made in this Institute. This dried and lanolinated
K 65
Annexe L.
BACTERIOLOGICAL INSTITUTE.
REPORT BY DR. E. A. SHAW, R.N., Acting Bacteriologist.
Staff.
Early in June, 1909, owing to the most unfortunate death of Dr. W. Hunter, the then Government Bacteriologist, my services were asked for to carry on his duties until the arrival in the Colony of the officer appointed to permanently succeed him. It thus falls to my lot to prepare this report for the year 1909. which is based in part on records left by Dr. Hunter, and by Dr. C. M. Heanley whose appointment as Assistant Bacteriologist terminated on April 4th. The newly appointed Bacteriological Assistant, Mr. Chan Tsun-kon, who commenced duty on 5th April, is showing very considerable aptitude for his work, and bids fair to thoroughly justify his selection for the post he occupies.
Buildings.
These have been maintained in good repair. During the Sum- mer, I had the whole of the micro-photographic apparatus, which was placed in the upper storey of the Institute where its efficiency was much interfered with by its susceptibility to vibration, and consequent blurring of phothographic plates, transferred to the basement where it now stands on a concrete floor, is much more steady and correspondingly increased in efficiency.
The Preparation of Vaccine Lymph.
On taking over the duties at the Institute in June, 1909, I found the prepared vaccine lymph was being stored in chambers cooled to a constant temperature of 65° F. Finding that from time to time. many tubes of lymph had to be rejected because of an obvious growth of contamination in them, and further finding on microscopical examination that this was fungoid in nature, for the growth of which 65° F. was a most favourable temperature, I determined to store the lymph at a temperature of 40° F. This answered admirably, and it is now very rarely necessary to reject a tube of lymph for the above mentioned reason; moreover the duration of potency of the lymph is by this procedure greatly prolonged; to as much as six months certainly in the case of lymph prepared in the hot weather and reported on by various vaccinators just recently.
In every case the lymph used for vaccinating the calves has been first intensified by passing through rabbits, which is found to greatly increase the potency of the final product.
In August specimens of calf vaccine (a.) dried, and (b.) lano- linated, and intended for tropical use, were received for examination and report from the Lister Institute, these were tested by myself on rabbits and by Dr. J. C. Thomson at Victoria Gaol on cases requir- ing vaccination, but neither was found by either of us to be as efficient as that made in this Institute. This dried and lanolinated
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