TRYPANOSOMIASIS 



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with parasites belonging to the flagellate family Trypanoso- 

 midae. The term is analogous to Teniasis and Coccidiosis. 

 There are a number of different trypanosomiases now recog- 

 nized, being caused by different species of Trypanosoma. 

 Among these the following may be mentioned : 



[. Surra. A disease of equines, camels, elephants and 

 certain other animals in India, attributed to Trypanosoma 

 Evansi. 



2. Nagana, nygana or Tsetse fly disease of Africa. Af- 

 fecting cattle, horses, mules, asses, antelopes, camels and 

 certain other animals. It is attributed to Trypanosoma Briicei. 



3. Dotirine or maladie du co'it of Algiers, France amd 

 Spain. It attacks the horse and the ass in particular, but may 

 be transmitted to certain other animals. It is attributed to 

 Trypanosoma equiperdum.. 



4. Mai de caderas of South America. It affects horses, 

 asses, cattle, hogs and certain other animals. It is attributed 

 to Trypanosoma equinum. 



5. Rat trypanosomiasis attributed to Trypanosoma Lewisi. 

 By some authors this parasite is alleged to be identical with 

 the horse surra organism, but it is quite certain that rats may 

 harbor a distinct species. Until the results of further investi- 

 gations are recorded it is deemed best to consider these as dis- 

 tinct infections. Musgrave and Clegg conclude that proof 

 sufficient to establish the individuality of the Trypanosoma 

 causing trypanosomiasis in domestic animals has not yet been 

 advanced. These authors consider the trypanosoma found in 

 domesticated animals in the Philippine Islands as 7>. Evansi. 



It is important to note the observation of Musgrave and 

 Clegg that "in all the forms of trypanosomiasis the infection 

 seems to involve particularly the genitalia, the skin, and the 

 organs of special sense. The skin symptoms consist of rough- 

 ening of the hair, which also falls out in places ; a thickening 

 of the epidermis, often with exfoliation, and in some stages of 

 the disease, various skin eruptions. There may be simple 

 erythema, and more rarely they may assume the severer forms, 



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