1917] VETERINARY MEDICINE. 779 



Andropogon aciculatus known as " enefuk " are troublesome to horses allowed 

 to run in pastures. The thorns of the former plant cause local inflammation 

 that results in the falling out of the hair, leaving raw sores, or the skin drying 

 and peeling off, leaving a disfigured appearance, while the adherent awn of the 

 latter plant causes conjunctivitis. 



Use of the arsenical dip kept the cattle free from ticks, which was found im- 

 possible through picking and the oil and kerosene treatment. The importance 

 of keeping the stock free from ticks is emphasized by the work of the year. 

 Charts of the temperatures of four animals suffering from tick infestation are 

 included. 



Brief mention is made of the kidney worm {Stephanurus dentatus), a lung- 

 worm {Metastrongylus apri), and a cecum worm (Trichuris crenata) in swine, 

 the first two of which were described in detail in a previous report of the station 

 (E. S. R., 35, p. 877). Infestation by the cecum worm results in emaciation and 

 a rough, scaly skin, and diarrhea is present in the early stages. Post-mortem 

 examination shows the mucus surface of the large intestines, especially that 

 of the cecum, to be covered with a thick yellowish crust, the removal of which 

 exposed many pitted ulcers, particularly in chronic cases. The parasites in 

 many instances show through the serous coat of the intestines, and a marked 

 cirrhosis of the liver is generally pre.sent. 



The nodular worm {CEsophagostomum columbianum) and the fourth stomach 

 worm {Ecemonchus contortus) appeared in the station herd of goats and caused 

 the death of several kids. But few of the chicks in the station flock were lost 

 during the year from diseases or intestinal parasites. A list of 7 external and 

 15 internal parasites collected, based upon identifications by the Bureau of 

 Animal Industry of the U. S. Department of Agriculture, is included. 



[Report of the veterinary department], J. W. Connaway and A. J. Durant 

 (Missouri Sta. Bui. I47 {1917), pp. 54-57). — Continuing the study of hog cholera 

 and the factors concerned in immunity against the disease (E. S. R., 35, p. 878), 

 a preliminary investigation indicated that " no relation exists between the com- 

 plement-fixation reaction and the potency of the antihog-cholera serum, and 

 that the reaction observed was due to other immune bodies than the specific 

 immune bodies of hog cholera." It is indicated, however, that these conclusions 

 should not be accepted as final until proved by further work. 



The contagious abortion investigations were continued in cooperation with 

 the dairy husbandry department and a number of cattle breeders in various 

 parts of the State. Of 42 herds tested during the year for contagious abortion 

 by the complement-fixation test, 31 proved to be infected. Of 688 animals tested, 

 212 yielded a positive reaction. Data on the question of the transmission of 

 contagious abortion infection from immune positive-reacting dams to their 

 apparently healthy offspring in utero or subsequent to birth through infected 

 milk and the permanency of this infection in the offspring are submitted. 

 While it is considered that more complete data will be necessary for final con- 

 clusions, from the data at hand it is provisionally concluded that " the proba- 

 bility of the abortion infection passing from an immune positive-reacting dam 

 to the calf in utero is not great ; or, if such apparently normal calf is infected 

 at birth, the abortion infection is probably not conserved in its tissues until the 

 first breeding period. Moreover, the danger of the permanent transmission of 

 abortion infection to the calf through raw milk is small." 



Annual report of proceedings under the diseases of animals acts, the mar- 

 kets and fairs (weighing of cattle) acts, etc., for the year 1916, A. W. An- 

 STKTJTHEE {Bd. Agr. and Fisheries [London], [Vet. Dept.], Ann. Rpts. Proc. 

 1916. pp. 28). — This reports upon the occurrence of and control work with foot- 

 and-mouth disease, of which there was one outbreak, and hog cholera during the 



