(41) 



XIII.— THE BACTERIOLOGY OF THE OYSTER AND OTHER 



SHELLFISH. 



Our investigations under this head have been made in the following directions : — 



1. The Identification and Differentiation of the Bacillus typhosus and B. coli 



communis. 



2. The action of sea-water upon the growth of the Bacillus typhosus. 



3. The infection of the oyster with the Bacillus typhosus. 



4. The bacteria present in the alimentary canal of the oyster and other shellfish. 



5. The occurrence of Bacillus enteritidis sporogenes in shellfish. 



In September, 1896, an abstract of our results was published at the Liverpool 

 Meeting of the British Association, and shortly afterwards the Local Government' Board 

 Report upon "Oyster Culture in Relation to Disease" appeared (November, 1896). 

 The report was a very full one, and was furnished by Dr. Bulstrode and Professor 

 Klein, and summarised by Sir Richard Thorne Thorne. The ground covered by 

 Professor Klein and by ourselves was much the same, and our results approximated to his. 

 Since then we have continued the work, and have repeated and extended our observa- 

 tions, of which the following are the more important. 



I. — The Identification and Differentiation of Bacillus typhosus and 



B. COLT communis. 



We have systematically tested the majority of the chief differential reactions 

 upon samples of B. typhosus and B. coli obtained from numerous sources, and have in 

 all cases found unmistakable differences between the two bacilli. 



