742 THE ANIMAL PARASITES OF MAN 



Montgomery, rinderpest can be transmitted by blood inoculation, 

 while coccidiosis cannot be so transmitted, but may be diagnosed by 

 the microscope. These differences should be remembered as the two 

 diseases are often found to be associated and are difficult to separate 

 clinically. Coccidia have also been found in Australian cattle. 



The Haemosporidia. It is likely that this order (see p. 151) may 

 be soon abolished. Mesnil 1 (April, 1915) considers that the grouping 

 of the three families, Plasmodiidae (or Haemamcebidae), Haemogreg- 

 arinidae and Piroplasmidae in the order Haemosporidia is no longer 

 possible, because of the coccidian nature of the Haemogregarines 

 (see p. 154). The Coccidia are divisible into the Adeleidea and the 

 Eimeridea (see p. 141). The Haemogregarinidae are allied to the 

 former, and the Plasmodiidae to the latter. The Piroplasmidae, until 

 more is known of their life-cycle in the invertebrate host, cannot be 

 more definitely placed. 



The Leucocytozoa of Birds. Regarding the statement, on p. 153, 

 that Laveran and Franga consider that avian leucocytozoa may inhabit 

 red blood cells, it may be added that Franga 2 (April, 1915) remarks 

 that the action of the parasites on the red cells is very rapid and 

 very intense. The host cells become so altered that it is difficult 

 to -recognize their true nature. He used very young birds in his 

 researches. Two shapes of host cell are considered, namely, those 

 with fusiform prolongations, and those which are rounded and with- 

 out such prolongations (see p. 153). The movements and form of 

 the Leucocytozoa determine the shape of the host cell, as was pointed 

 out by Fantham 8 in 1910. 



Schizogony. of these parasites has been seen by Franca (1915) and 

 by Coles (1914), in addition to Fantham (1910), and to Moldovan 

 (1913), mentioned on p. 153. Schizogony may also take place in the 

 lungs of the host. The genus Leucocytozodn, established by Ziemann 

 in 1898, belongs to the family Haemamcebidae. 



II. FORMULAE OF SOME CULTURE MEDIA. 



(i) Culture Media for growing Amoebae. There has been much 

 discussion as to whether the true parasitic Entamcebce or Endamceba 

 can be grown on culture media (see p. 42). Undoubtedly certain 

 free-living amoebae can be so grown, and it is considered that some 

 of the earlier researches on the so-called artificial growth of the 

 dysenteric amoebae were really due to contaminations with free-living 

 forms. The following media are worthy of note : 



1 Bull. Soc. Path. Exot., viii, p. 241. 



- Ibid., p. 229. 3 p roft Zoo l. Soc. Land., 1910, p. 694 



