266 Manual of Veterinary Microbiology. 



horse it causes the formation of an ahscess. In tlie 

 mouse* it produces, in addition, metp.stases hy "v^ay 

 of the lymphatics and blood vessels. Natural in- 

 fection takes place through diflerent channels but 

 more especially through the respiratory and digestive 



mucous mem- 

 ^^' ■ branes. Its ab- 



sorption is facili- 

 tated by the 

 presence of solu- 

 tions of continu- 

 ity, but it has 

 not been shown 

 that these are 

 necessary. Ac- 

 cidental or ope- 

 .. rative wounds 

 also sometimes 

 furnish ports of 

 Streptococcus equi, pus of strangles of horse, entry for the 



y'*^'A 





•.....•••••••. 



"^.....••* 



X 1000. (Kitt.) 



Virus; castration 



wounds, for example, may be infected by the surgeon 

 himself, his hands or instruments being soiled with 

 the germs from previously handling horses suffering 

 from strangles. The disease is transmitted from the 

 mother to the foetus. Whatever may be its mode of 



* [An important differential test in distinguishing this disease 

 {in its less characteristic forms) from glanders consists in the in- 

 oculation of mice. White and gray house mice are highly sus- 

 ceptible and die from inoculation with strangles, but are insus- 

 ceptible to glanders. Field mice, on the contrary, die from inocu- 

 lation with glanders, but develop only a local lesion from inocula- 

 tion with strangles. — Th. Kitt : Bacterienkunde, p. 254.— D.] 



