686 



EXPERIMENT STATION EECOBD. 



Lad the opportunity of obtaining fresh material from rabbits dying rapidly of 

 acute coccidiosis, I fed a healthy young pigeon directly with oocysts of C. cimi- 

 ciili. At first oocysts were voided by the pigeon, then none were found in the 

 feces, and no symptoms associated with coccidiosis appeared at any time. The 

 first oocysts voided were merely those supplied to the bird which had passed 

 unchanged through its alimentary tract. Though this pigeon received several 

 doses of the oocysts of Eimcria (Coccidimn) cunicuJi, it never developed cocci- 

 diosis, and the post-mortem examination made immediately after killing the bird 

 showed a perfectly normal condition of every organ. I consider that these ex- 

 periments show conclusively that E. aviiiw and E. cuniculi are distinct species 

 of Eimeria and are not identical. There are also morphological differences be- 

 tween the two, chiefly of size {E. avium is the smaller)." 



The author discusses experimental methods, the symptoms of coccidiosis, 

 internal organs, relative resistance of different breeds of fowls and pigeons to 

 coccidiosis, the dissemination of coccidiosis over tracts of country, the duration 

 of vitality of coccidian oocysts, and the effects of certain reagents on coccidian 

 oocysts. 



Observations on the blood of grouse, H. B. Fantham {Proc. Zool. Soc. 

 London, 1910, III, pp. 722-731, jjI. 1). — In blood-counts of 50 birds the number of 

 erythrocytes was found to vary from 3,600.000 to 5,800,000, averaging 4,300,000 

 per cubic millimeter. The number of red cells was apparently higher in the 

 cock grouse (4,400,000 per cubic millimeter) than in the hen grouse (3,800,000 

 per cubic millimeter). The number of leucocytes found per cubic millimeter 

 in the blood of apparently healthy grouse varied from 22,000 to 50,000, averaging 

 about 32,000 per cubic millimeter. 



Classification of the leucocytes of healthy and diseased grouse. 



Lymphocytes 



Large mononuclears 

 Polymorphonuclears 



Eosinophiles 



Mast cells 



Apparently 

 healthy 

 grouse. 



Per cent. 



67 



19 



20 



3 



1 



Lmcocyto- 

 zobn lovati 

 in blood of 

 a grouse. 



Two grouse 



chicks 

 dying from 

 coccidiosis. 



Per cent. 



63.0 



28.0 



5.5 



2.5 



1.0 



Per cent. 

 26. 0-50. 

 13.0-31.0 

 31.5-39.5 



3.5- 5.5 



0.6 



A fowl 

 chick dy- 

 ing from 

 coccidiosis. 



Three adult 



grouse 



killed by 



Tricho- 



strongylus 



pergra- 



cilis. 



Per cent. 



20.5 



29.5 



47.0 



2.0 



1.0 



Per cent. 



44. 0-62. 5 

 6. 0-10. 

 7.5-14.0 



23. 5-42. 

 0.5 



" The number of red cells found in an adult cock grouse dying from helmin- 

 thiasis was 3,250,000 per cubic millimeter, the number of red cells for a normal 

 cock grouse being about 1,000,000 more. The hemoglobin value estimated by 

 Tallquist's scale was 60 for a gi-ouse suffering from helminthiasis and 80 to 90 

 for healthy adult grouse." 



A list of 13 references to literature is appended. 



Antifowl cholera serum and its practical significance, P. W. Sisoff {Arch. 

 Yet. Nauk [St. Pctersh.], iO {1910), No. 7, pp. S0.',-818; ads. in Ztschr. Im- 

 munitatsf. n. Expt. Thcr., II, Rcf., 3 {1910), No. 7, p. 822).— This is an exten- 

 sive report in regard to the preparation of a polyvalent, antif owl-cholera serum 

 and the practical, therapeutical results obtained with it. 



It is shown that by immunizing a bovine over an extended period (over 2 

 years) with virulent, fowl-cholera cultures, an active prophylactic and curative 

 serum can be obtained. Using this serum prophylactically in a great many 

 epizootics (3,870 birds) it was noted that the disease can be easily held in 

 check. As a curative agent the figures show that there was a reduction in the 

 mortality from 90 to 22 per cent where the serum was used. 



