Apr. 1, 1925 
Investigations of Infectious Equine Anemia 
691 
months. The etiological factor is 
-apparently ultramicroscopic, since the 
disease can be reproduced by the 
injection of Berkefeld filtrates, and is 
not recognizable by ordinary staining 
methods in smears from the blood, 
tissues or exudates and transudates. 
The natural mode of transmission is 
not known, but is most likely through 
the bites of insects. Methods of 
treatment thus far used have proved 
unsuccessful, killing the infected ani¬ 
mals being necessary to prevent spread 
of the disease. A positive diagnosis 
can only be secured by animal inocu¬ 
lation. Animals other than equines are 
not susceptible to the disease. 
LITERATURE CITED 
(1) Carre, H., and Vallee, II. 
1904. SUR L’ANEMIE INFECTIEUSE DU CHEVAL. 
Compt. Rend. Acad. Sci. [Paris] 139: 1239-1241. 
<2)-and Vallee, H. 
1905. RAPPORT SUR L’ANEMIE INFECTIEUSE DU 
cheval. Bill. Mens. Off. Renseig. Agr. 
[Paris] 4: 1075-1077. 
<3) -and Vallee, H. 
1900-07. recherches cliniques et experi- 
MENTALES SUR L'ANEMIE PERNICIEUSE DU 
CHEVAL (TYPHO-ANEMIE INFECTIEUSE). ReV. 
G6n. M6d. Vtt 8: 593-608, illus., 1906; 9: 113- 
124, illus., 1907. 
<4) -and Vallee, H. 
1916. SUR L’ETIOLOGIE DE L’ANEMIE INFECTIEUSE 
DU CHEVAL. Rec. Med. V6t. 92: 193-199. 
<5) Mack, W. B. 
1909. equine anemia. Nev. Agr. Exp. Sta. Bui. 
72: 46-47. 
< 6 ) - 
1909, EQUINE ANEMIA. AN ACCOUNT OF A RE¬ 
CENT INQUIRY INTO THE NATURE AND CAUSE OF 
AN OBSCURE AND FATAL DISEASE AMONG HORSES 
IN eastern Nevada. Nev. Agr. Exp. Sta. Bul. 
68 , 96 p., illus. 
<7) -• 
1909. A STUDY OF A SERIOUS ANEMIC DISEASE 
AMONG HORSES. Amer. Vet. Rev. 36: 222-247, 
illus. 
< 8 ) - 
1910. anemia in horses. Nev. Agr. Exp. Sta. 
Bul. (1908) 66: 65-68. 
<9) - 
1910. A FATAL ANAEMIC DISEASE AMONG HORSES. 
Proc. Amer. Vet. Med. Assoc. (1909) 46: 307-321, 
illus. 
< 10 )- 
1911. INTRACELLULAR BODIES ASSOCIATED WITH 
equine anemia. Proc. Amer. Vet. Med. 
Assoc. 48: 378-382, illus. 
<11) Miyagawa, Y., and others. 
[1918]. [ON THE MICROORGANISM CAUSING INFEC¬ 
TIOUS ANEMIA OF THE HORSE AND ITS PURE 
cultivation.] Saikingaku Zasshi, No. 267. 
[Japanese original not seen. Abstract in Jour. 
Amer. Vet. Med. Assoc, (n. s. 9) 56: 642-649, 
1920.1 
<12) Scott, J. W. 
1913-15. swamp fever. Wyo. Agr. Exp. Sta. 
Ann. Rpt. 24: 159. 1913/14; 25: 104, 1914/15. 
03) - 
1915-18. THE transmission of swamp fever in 
horses. Wyo. Agr. Exp. Sta. Ann. Rpt. 26: 
88 , 1915/16; 27: 153-154, 1916/17; 28: 84-85, 
1917/18. 
04) -- 
1915. INSECT TRANSMISSION OF SWAMP FEVER. 
Science 42: 659. 
(15) - 
1917. SOME EXPERIMENTS ON THE TRANSMISSION 
of swamp fever by insects. (Abstract) Anat. 
Rec. 11: 540-541. _ 
(16) Scott, J. W. 
1918. FURTHER EXPERIMENTS ON THE TRANSMIS¬ 
SION of swamp fever. (Abstract) Anat. Rec. 
14: 98-99. 
6 
£5 
(17) - 
1920. EXPERIMENTAL TRANSMISSION OF SWAMP 
FEVER OR INFECTIOUS ANEMIA BY MEANS OF 
insects. Jour. Amer. Vet. Med. Assoc, (n. s. 9) 
56: 448-454. 
(18) Wright, L. II. 
1920. A COMPARATIVE STUDY OF THE LONG BONES 
IN INFECTIOUS EQUINE ANEMIA AND OTHER 
conditions. Jour. Amer. Vet. Med. Assoc, 
(n. s. 9) 56: 444-447. 
O 
