L 79
EXAMINATION OF RATS.
The results are given in Table I. The total number of Rats examined was 82,715 compared with 87,043 in 1913. 471 were found to be Plague-infected (249 in 1913).
BACTERIOLOGICAL EXAMINATION OF WATER.
The three chief water supplies of the Colony (Kowloon, Tytam and Pokfulum) were examined quarterly and the results are given in Tables II, III and IV.
In every case the sample was taken at its source, i.e., either directly before or directly after filtration.
The methods used in carrying out the examinations were the same as those described in my "Report on an Investigation of the Pokfulum Water Supply" (No.20 of 1911).
INVESTIGATIONS.
Mosquito Investigation.-In view of the opening of the Panama Canal and the possible importation of Yellow Fever, the Secretary of State by a letter of 22nd August, 1913, ordered that arrangements be made "to supply the Imperial Bureau of Entomology as soon as practicable with all information available as to the distribution of Mosquitoes and in particular of Stegomyia in Hongkong, and also for collections of mosquitoes to be sent to the Director of the Imperial Bureau".
The carrying out of this work was entrusted to me by the Principal Civil Medical Officer and though not yet completed, some definite results can now be recorded.
The total number of different samples of larvæ collected for breeding out purposes now amounts to 14,909; from these, over 41,000 adult mosquitoes have been bred out and pinned.
Approximately 26,000 of these species derived from over 6,000 different samples of larvæ have been finally dealt with. The Imperial Bureau of Entomology has made the diagnosis in 21,000 of these specimens, the remaining 5,000 being dealt with locally. 15,000 specimens still remain to be classified but it is expected that the majority of these can be classified here, only specimens of special interest being forwarded to the Imperial Bureau.
The following is a complete list of species so far found in Hongkong. In every case the diagnosis has either been made or confirmed by the Imperial Bureau of Entomology.
L 79
EXAMINATION OF RATS.
The results are given in Table I. The total number of Rats examined was 82,715 compared with 87,043 in 1913. 471 were found to be Plague-infected (249 in 1913).
BACTERIOLOGICAL EXAMINATION OF WATER.
The three chief water supplies of the Colony (Kowloon, Tytam and Pokfulum) were examined quarterly and the results are given in Tables II, III and IV.
In every case the sample was taken at its source, i.e., either directly before or directly after filtration.
The methods used in carrying out the examinations were the same as those described in my "Report on an Investigation of the Pokfulum Water Supply" (No. 20 of 1911).
INVESTIGATIONS.
Mosquito Investigation.-In view of the opening of the Panama Canal and the possible importation of Yellow Fever, the Secretary of State by a letter of 22nd August, 1913, ordered that arrangements be made "to supply the Imperial Bureau of Entomology as soon as practicable with all information available as to the distribution of Mosquitoes and in particular of Stegomyia in Hongkong, and also for collections of mosquitoes to be sent to the Director of the Im- perial Bureau ”.
The carrying out of this work was entrusted to me by the Principal Civil Medical Officer and though not yet completed, some definite results can now be recorded.
The total number of different samples of larvæ collected for breeding out purposes now amounts to 14,909; from these, over 41,000 adult mosquitoes have been bred out and pinned.
Approximately 26,000 of these species derived from over 6,000 different samples of larvæ have been finally dealt with. The Imperial Bureau of Entomology has made the diagnosis in 21,000 of these specimens, the remaining 5,000 being dealt with locally. 15,000 specimens still remain to be classified but it is expected that the majority of these can be classified here, only specimens of special interest being forwarded to the Imperial Bureau,
The following is a complete list of species so far found in Hongkong. In every case the diagnosis has either been made or confirmed by the Imperial Bureau of Entomology.
No comments yet.
Private notes are available after approval.