1910.] DR. IT. 11. FANTJIAM OX AVIAX COCCIDIOJIS. 721 



fortnight's intervnl, the cysts appeared to be slightly shrmikoii, 

 while fecal odour was noticeable. A month later, the oocysts 

 were more shrunken and a few free sporocysts Avere found, while 

 ten weeks after treatment, a slight smell was still perceptible, and 

 the oocysts present were shrunken and showed oily contents. 



Ferrous sulphate (coppei-as) had much the same efi'ect as sodium 

 salicylate, but did not deliquesce. Though its action at fir-st 

 seemed to be rather less eflective, it secured the .same result 

 ultimately. 



IX. Concluding Remarks. 



The ravages of coccidiosis among grouse chicks may be under- 

 estimated on the moors, since the tiny corpses of the birds lie 

 hidden among the heather. 



While it is relatively easy to take pi'eventive measures in the 

 case of coccidiosis in fowls, it is most difficult to take active 

 measures in the case of grouse. The remedy of heather burning 

 is drastic and coccidian spores, which are present in the tract 

 burnt, are then destroyed. However, heather is rather slow- 

 growing, and so heather-burning, while efficacious, is somewhat 

 restricted in its area of application. Lime dressing is destructive 

 to spores of coccidia, and could probably be utilised in the case of 

 limited outbreaks of disease among grouse chicks. The effect 

 of lime on the heather on the moors should first be carefully 

 investigated on a large scale (see p. 720). Any condition tending 

 to raise the general vitality of the birds also makes them much 

 more resistant to disease. An abundant supply of healthy young 

 heather, by raising the general standard of health of the birds, 

 is probably one of the best safeguards against the insidious disease, 

 coccidiosis. 



References to Literature. 



CoBBETT, L., and Graham-Smith, G. S. (1910). — "An Investigation 



of the Pathology of ' Grouse Disease.' " Journ. Hygiene, x. 



pp. 1-36, 5 pis. 

 Fantham, H. B. (1910).—" The Morphology and Life History of 



Eimeria (Coccidium) aviimn; a Spoi-ozobn causing a fatal 



disease among young Grouse." Proc. Zool. Soc. Lond., 



pp. 672-691, 4 pis. 

 Hadley, p. B. (1909). — " Studies in Avian Coccirliosis. I. White 



Diarrhea of Chicks. II. Roup of Fowls." Centralbl. f. 



Bakteriol, Abt. I., Orig., 50, pp. 348-.353. 

 Morse, G. B. (1908).-" White Diarrhea of Chicks, with Notes on 



Coccidiosis in Birds." Circular 128. U. S. Dept. Agricult., 



Bnreavi of Animal Industry. 

 Rettger. L. F. (1909). — " Further Studies on Fatal Septicr-emia 



in young Chickens, or ' White Diarihea.' " Journ. Med. 



Research, xxi., pp. 115 123. 



