182 EXPERIMENT STATION RECORD. I Vol. 37 



under conditions in which transference of Onchocerca might be expected to 

 take place, supposing this insect to be tlie vector, failed to convey infection. 

 This renders it apparently unlikely that S. calcitrans is the vector. Similar 

 experiments of a less satisfactory nature with mosquitoes failed to convey in- 

 fection. Transmission by mosquitoes can not, however, as yet be ruled out of 

 court. A control calf protected in a fly- and mosquito-proof cage failed to be- 

 come infected with Onchocerca. A calf, penned in an earthen floored cage, in 

 the open, level with the ground, and exposed to the attacks of mosquitoes, 

 Stomoxys, and tabanids showed the presence of a worm nest. In one of the 

 stock animals examined, an arrested ' traveling ' worm, 2.5 to 3 in. long, was 

 found in a delicate fibrous tunnel. Circumstantial evidence appears to indicate 

 that a tabanid may be the vector, which is supporte<l to some extent by the ap- 

 parent distribution of worm nests and of tabanids in Australia. Worm nests 

 are more common in local cattle in the Sydney and Newcastle districts than was 

 anticipated." 



Shipping fever of horses. J. K. Mohij:r (Jour. Amer. Vet. Med. Assoc, 50 

 0917), No. 7. pp. 817-828). — This paper, presented at the meeting of the 

 American Veterinary Medical Association held at Detroit, Mich., in August, 1916, 

 has been .substantially noted (E. S. R., 36, p. 85). 



Vesicular stomatitis contagiosa, J. Gregg, F. X. McGuire, G. J. Gloveb. 

 A. GiLi.E.SPiE, and G. Gregory (Amer. Jour. Vet. Med., 12 (1917), No. 4' PP- 2^/, 

 222). — This account of the disease is based upon observations during the last 

 four months of several thousand cases in horses and mules at the remount hos- 

 pitals at Newport News. Va. The authors describe it as a contagious, febrile 

 (li.sea.se affecting horses and mules, with the principal pathological changes con- 

 fined to the tongue, buccal mucous membrane, lijis, and occasionally the nose. 

 A large gram-positive micrococcus was obtained in pure culture by withdrawing 

 the material, under aseptic conditions, from unruptureil vesicles occurring 

 chiefly on the tongue. One attack appears to render an immunity. 



So-called staggers in horses caused by the ingestion of Pteris aquilina, 

 the common bracken, S. Harwen (Jour. Ariier. Vet. .Med. Assoe., 50 (1917), 

 No. 6. pp. 702-70 i). — The death of many horses during .lanuary and February, 

 1916, from what farmers have commonly known as staggers letl to an investiga- 

 tion. It appears that cases of this disease may be found in every country dis- 

 trict along the banks of the Fraser River and on Vancouver Island. The autlior's 

 experiments show that it can be reproduced by feeding bracken fern in both 

 winter and summer, and the designation "bracken poi.soning" is i)ropose<l for 

 the affection. 



A case of splenic abscess, secondary to invasion of the stomach wall of 

 a horse by Spiroptera megastoma, C. G. Dickenson (Vet. Jour., 73 (1917), 

 No. 502, pp. l-i, 15). — The ca.se here reported is said to be the first to come to 

 the author's attention in which a splenic abscess has been found as a secondary 

 infection. 



Bacillary white diarrhea or fatal septicemia of chicks and coccidiosis or 

 coccidial enteritis of chicks, J. R. Beach (California Sla. Cire. 162 (1917), 

 pp. 8). — It is stated that in California coccidiosis is very prevalent while out- 

 breaks of bacillary white diarrhea are comparatively infrecpient. In none of 

 the outbreaks of coccidiosis Investigated by the station have there been any 

 syniptoms or liistory which might be confuse<l with tho.se of bacillary white 

 diarrhea. In the present paper the author deals with the two diseases separately 

 and attempts to describe them In such a manner as to avoid any confusion 

 regarding their Identity. 



