. Pathogenic micro-organisms, including bacteria and Protozoa; a practical manual for students, physicians and health officers. Hacillus pestLs from agar culture. Bacillus i>cstis from bouillon culture. X 1100 diam. X 1100 iliain. Roman empire and before it terminated destroyed in many portionsof the country nearly 50 per cent, of the peo])le. The fourteenthcentury saw the whole of Europe .stricken. E.\cej)t for occasionalcases, Euro])e and America have of late been free, but in India thedisease has recently broken out in all its horrors so that at the present 423 424 PA THOGENIC MICRO-ORGA


. Pathogenic micro-organisms, including bacteria and Protozoa; a practical manual for students, physicians and health officers. Hacillus pestLs from agar culture. Bacillus i>cstis from bouillon culture. X 1100 diam. X 1100 iliain. Roman empire and before it terminated destroyed in many portionsof the country nearly 50 per cent, of the peo])le. The fourteenthcentury saw the whole of Europe .stricken. E.\cej)t for occasionalcases, Euro])e and America have of late been free, but in India thedisease has recently broken out in all its horrors so that at the present 423 424 PA THOGENIC MICRO-ORGANISMS. Fig. 134 time over 500,000 persons die annually from it. Among the mostfatal forms of infection is that of the lungs. Pneumonic cases arenot alone very serious, but they readily spread the infection. Thebacillus exciting the disease was discovered simultaneously by Kiia§atoand Yersin (1894) during an epidemic of the bubonic plague in is found in large numbers in the fluid from the recentbuboes characteristic of this disease and in the lymphatic glands;more rarely in the internal organs excep


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