INFECTION SOURCES OVERLOOKED 189 



stalks of grass and in imported hay, and adults have 

 been reared from the same in England. There is 

 not much doubt that these larvae would have 

 developed equally well in an English cowshed. 

 Another source of infection often overlooked is the 

 hoofs of animals. Small larvae, both of ticks and of 

 worms, have been found in the cracks of hoofs of 

 cattle and between their toes, while scarcely discern- 

 ible spaces between the hoofs and shoes of horses 

 have been found to contain minute parasites that 

 might be of very serious import later on. It is 

 obvious that great care needs to be exercised both in 

 the buying of foreign stock and of foreign hay. 

 The cattle trade of Great Britain is of very great 

 importance, and all support should be given to aid 

 thoroughly scientific investigations of the cattle 

 diseases in the various parts of the world trading 

 with Great Britain. 



In this chapter we have dealt with the parasites 

 affecting the blood-corpuscles of the larger numbers 

 of cattle, but it should be mentioned that other 

 parasites allied to Piroplasma, and named Nicollia,, 

 Nuttallia, etc., have been described and differenti- 

 ated from time to time, and have been classified on 

 the basis of morphology and pathology by Professor 

 Franga, whose work we commend to the notice of 

 those interested in the cattle, sheep, and horse 

 industry of Greater Britain. 



