66 THE ANIMAL PARASITES OF MAN 



nucleus. There is multiplication and cyst formation as before. The 

 organism is easily cultivated, especially in the condensation water of 

 nutrose agar and maltose agar. The pathogenicity is stated to be nil. 



Prowazekia javanensis, Flu, 1912. 



Found in agar cultures from the motions of patients at Welte- 

 vreden, Dutch East Indies. 1 The flagellates are 12 JJL long and 5 //, broad. 

 The lateral flagellum is stated to be attached to the cell body for a 

 short distance. Regarding the karyosome in the nucleus, the author 

 states that the smaller the karyosome the more chromatin is deposited 

 on the nuclear membrane. Flu mentions that the specific name 

 javanensis is a temporary one, as in the course of time it may be 

 shown that there is only one species of Prowazekia. 



Prowazekia cruzi, Hartmann and Chagas, 1910. 



Found in a culture from human faeces on an agar plate in Brazil, 

 and considered to be a free-living form. 2 The organism is oval or 

 pear-shaped, 8 /* to 12 p long and 5 //, to 6 //, broad. In human stools 

 at Tsingtau, China, a Prowazekia has been found by Martini which 

 he thinks is the same as Prowazekia crnzi. He considers it to be a 

 cause of human diarrhoea and intestinal catarrh. 



Prowazekia weinbergi, Mathis and Leger, 1910. 



This species was found in the faeces of men, both healthy and 

 diarrhceic, in Tonkin. 8 It is pear-shaped, 8/x to 15/4 long by 4 yu, to 

 6-5 //, broad. The flagella occur at the broad end. 



The discoverers think that Prowazekia weinbergi is an intestinal 

 inhabitant, but non-pathogenic, since it was found to occur in the 

 faeces even when obtained with aseptic precautions. 



Prowazekia parva, Nagler, 1910. 



A free-living form found in the slime on the stones at the biological 

 station at Lunz. Another Prowazekia was found in 1914 in tap-water 

 in Calcutta. 



Family. Trypanosomidae, Doflein. 



The Trypanosomidae, broadly considered, are uniflagellate 

 organisms, the flagellum being at the anterior end. The flagellum 

 arises near the blepharoplast (kinetic nucleus), which lies anterior, 

 near or posterior to the nucleus. 



1 Geneesk. Tijdschr. v. Nederl. Ind., Hi, p. 659; Med. v. d. Burg. Geneesk. d. Nederl. 

 Ind,, iii, p. I, 



2 Mem. Inst. Osw. Cruz., ii, p. 64. 



8 Bull. Soc. Med. Chir. Indo-Chine, i, p. 471. 



