VETERINARY MEDICINE. 785 



sclerostome alone secretes a substauce capable of pruduciug an ocular reaction ; 

 this reaction is less frequent and weaker tlian that produced by the perienteric 

 liquid of the ascarid. 



Locust poison, W. G. Cook (Vet. Alumni Quart. [Ohio State Oniv.], 1 (1913), 

 }fo. S, pp. 5Jf, 55). — A report of the fatiil poisoning of 2 horses, caused by chew- 

 ing the inner barli of a locust tree {liobinia pseudacacia) to which they had 

 been hitched. 



The vector of mal de caderas, F. W. Ukich il'roc. Agr. Sue. Trinidad and 

 Tobago, 1914, No. 1, pp. 8, 9). — In his discussion of the probable intermediate 

 agent in the transmission in Trinidad of this disease of the horse, the author 

 states that the stable fly {Stomoxys calcitrans) occurs all over the island. A 

 heniatophagous bug, Triatoma gaiicidatus, which may possibly convey the try- 

 panosome. is said to occur in Trinidad as well as in Brazil. 



The occurrence of distomes in the intestine of the dog at Montpellier, 

 G. R. Blanc and H. Hedin (Compt. Rend. Soc. Biol. [Parus], 74 {191S), No. IS, 

 pp. 884, 8S5; abs. in Rev. Boot., 3 {1913), No. 4, P- 87).— The authors report the 

 discovery of fluke parasites in the intestines of 2 of 50 dogs examined in Mont- 

 pellier. The parasite, which is very small, appears to be a new species and 

 has been named Echino.stoma pit'ifonne. 



Controlling chicken pox, sore head, or contagious epithelioma by vacci- 

 nation, F. B. IIadley and B. A. Beach {Proc. Atner. Vet. Med. Assoc, 50 

 (1913), pp. 104-112, pi. 1; Amer. Vet. Rev., 44 (1913), No. 3, pp. 350-339, fig. 

 1). — Chicken pox and roup are believed to be the same disease manifesting itself 

 in difl:erent forms. Repeated success was attained in transmitting the disease by 

 subcutaneous inoculation of a few drops of a normal salt solution of the virus 

 made by macerating the comb and wattle tissue from birds showing well- 

 marked lesions of sore head, although the disease could not be produced by 

 this method every time. 



The Incubation pericxl varied from 3 to 20 days and diphtheritic membranes 

 frequently appeared on the nasal, oral, and conjunctival surfaces when the virus 

 was placed on them or injected subcutaneously. The involved epithelium of 

 the comb showed an increase in the size of the epithelial cells, which appeared 

 to contain inclusions and inflammatory changes in the deeper layers. 



In the treatment of the disease autogenous vaccines gave very satisfactory 

 results. " Best results were obtained by two doses. The vaccine is especially 

 applicable in large commercial and valuable breeding flocks when used before 

 pathological changes become marked. The vaccination treatment for chicken 

 pox was most valuable when used as a preventive, where it was effective in 

 fully 98 per cent of the cases. One attack conferred immunity. The immunity 

 which resulted from the vaccination is estimated to be effective for 11 to 2 

 years. 



" It was found Impossible to transmit the disease at every attempt due to 

 certain peculiarities of the virus and the fowls. When the attempts were suc- 

 cessful the disease ran a benign course, as it also did in the few cases In which 

 it made an appearance after vaccination. Experiments to show that chicken 

 pox is caused by a filterable virus resulted negatively. 



"Although the Identity of chicken pox and roup has not been definitely 

 proved, the similarity of these diseases is so great tliat it seems possible to 

 control roup by vaccination." 



Edema of the wattles of fowls due to an organism of the Pasteurella 

 group, H. R. Seddon {Vet. Jour., 10 {1914), No. 4G3, pp. 24-34, figs. 5).— This 

 paper has been summarized by the author as follows : 



" The breed affected in the cases under review was White Leghorn, but prob- 

 ably any breed with large wattles would be liable to the complaint. It has 



