598 A MANUAL OF BACTERIOLOGY 



form like Leptomonqs (Fig. 55, 6). The parasite is inocu- 

 lable into certain animals, provided large doses of virus 

 be injected into the loin or peritoneal <5avity. It has 

 been stated to be transmitted to man by a bug (? a 

 Conor Mnus), but this is very doubtful. 



In Oriental sore, or Delhi boil, a parasite practically 

 identical with the Leishman-Donovan body is present, 

 but as the two diseases run a totally different course, it is 



FIG. 55. a. The Leishman-Donovan body. b. The flagellated form 

 (Leptomonas) developing in citrated blood, c. Seven parasites in 

 a large mononuclear leucocyte. (After James, Patton, and Rogers.) 



probably a distinct species (L. tropica). On cultivation 

 it develops a flagellated form. The disease has a seasonal 

 prevalence, and Wenyon suggested that it is conveyed 

 by a mosquito, a species of Stegomyia. 



In North Africa, Nicolle has observed a Leishmaniasis of 

 children due to another species (L. infantum). It is trans- 

 missible to the dog and monkey, and can be cultivated. 

 The disease has recently been found all along the Mediter- 

 ranean littoral. It may be transmitted by dog fleas. 



About 30 per cent, of cases of kala-azar give a slightly 

 positive Wassermann reaction. 



