92 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



reactions as the non-transplanted bone-marrow. Biologically, bone- 

 marrow can therefore be transplanted into the spleen. In chronic 

 infections with streptococci and staphylococci extra-medullary deposits 

 make their appearance : these, however, are neither so large nor so 

 numerous as in chronic anaemia. 



Epidemic Dysentery on the Somme.* — G. Leygue and J. Haguenau 

 have studied an epidemic of 449 cases of bacillary dysentery which 

 occurred among French colonial troops to the south of the Somme during 

 the autumn of 1916. B. dysenteric Shiga was isolated in thirty- 

 six cases, B. dysenterise Flexner in five cases, and B. dysenterise Hiss 

 in twenty cases. In a smaller group of cases three other groups of 

 organisms were isolated, with the following group characteristics : — 



Type I 



Type II 



Type III 



o 



m 





Agar 



Litmus 

 Milk 



- 



Slight 

 tur- 

 bidity 



No 

 lique- 

 fac- 

 tion 



ditto ditto 



ditto 



ditto 



Colonies Slightly 

 a little redded 

 thicker 



than i 

 Flexner 



ditto ditto 



ditto ditto -f i -f - t-f 



-1- 



-f- 



-i- 



+ 



V ^ 



-I- 



Media uot fiagmeuted 



-f + 4-4- + 



s ^ ^ 



Media fragmented 



+ 



+ 1 + 



Agglutination was tried in 325 cases, with 190 positive results 

 (175 — to Shiga and 15 - to Flexner). Complement fixation was 

 performed in ten cases, with negative results. Mixed infections with the 

 enteric group were observed, B. paratyphosus A being isolated on four 

 occasions and B. paratyphosus B twice. Agglutination was positive with 

 B. typhosus in three cases and with B. paratyphosus A on one occasion. 



* Presse Med., xxv. (1917) pp. 4214. 



