620 MICROBIOLOGY OF THE DISEASES OF MAN AND ANIMALS. 



toxaemia is due to absorption from this site rather than to the presence of 

 the bacteria in the blood. 



The bodies of the bacteria are distinctly pyogenic. 



Secondary infections are prone to follow upon influenza so that 

 abscess, gangrene of the lung, and empyemia are not infrequent. 



Influenza bacteria have been found in the lungs, middle ear, meninges, 

 brain and spinal cord. 



Immunity after natural infection is transitory if present at all. 



The organisms are eliminated through the gates of entrance. Infec- 

 tion is for the most part direct, and follows close contact with a patient 

 or carrier. 



The bacteria are said to persist for many years in the bronchial secre- 

 tions of convalescents and healthy individuals. 



Therapeutically there is no specific measure for the control of this 

 disease. Remembering that the infective agent is ejected during the 

 coughing and speaking of the patient and is present in great numbers 

 in the sputum, personal hygienic measures in both patient and contact 

 should prove very effective. 



HLEMORRHAGIC SEPTIOEMIA.* 



Bacterium bomsepticum. 



Haemorrhagic septicaemia belongs to a class of similar diseases grouped 

 under the general head of Pasteur elloses. 



This disease has been reported from many portions of North America, 

 from some sections of South America and many European countries. 

 It is known under a variety of names, as cornstalk disease, buffalo disease, 

 pneumo-enteritis, etc. 



Bact. bovisepticum.pioduces a serious disease and affects a wide variety 

 of domestic and wild animals. The domestic animals most commonly 

 affected are cattle, sheep, horses and goats; the disease being much more 

 common among cattle than among other classes of stock. 



The onset of disease is usually sudden, and the case acute. Haemor- 

 rhagic septicaemia does not spread f-rom herd to herd but appears in 

 isolated outbreaks usually at wide distances apart. It is a common 

 experience to find a serious outbreak in one herd without any appearance 



*Prepared by M. H. Reynolds. 



