1917] VETERIXARY MEDICINE. 577 



The etiologry of Bocky Mountain spotted fever. — Occurrence of the parasite 

 in the tick, S. B. Wolbach {Jour. Med. Research, 35 {1916), No. 158, pp. 

 147-150). — "A parasite has been found in proved infected ticks in large numbers, 

 morphologically identical with the parasite found in the lesions of guinea pigs 

 and monkeys infected with Rocky Mountain spotted fever. This parasite does 

 not occur in the tissues of ticks proved to be noninfective. 



" The distribution of the parasite in the infected ticks indicates that the 

 transmission occurs by way of the salivary gland secretions. Transmission 

 by fecal contamination of the wound caused by the tick does not seem possible 

 because of the character of the tick's feces." 



Equine and bovine streptococci as causal agents of human Infections, A. J. 

 Chalmeks and A. Marshall {Jour. Trap. Med. and Hyg. [London'\, 19 {1916), 

 Nos. 18, pp. 213-215; 19, pp. 225-228) .—The authors here attempt to trace the 

 pathogenic streptococci found in puerperal fever and in sore throats to their 

 sources. 



The occurrence in the United States of certain nematodes of ruminants 

 transmissible to man, B. H. Ransom (New Orleans Med. and Surg. Jour., 69 

 {1916), No. 4, pp. 294-298). — In this article the author calls attention to the 

 occurrence in this country of three of the four species of Trichostrongjius 

 which have been recorded as parasites of man, namely, T. colubriformis, T. 

 vitrinus, and T. probohirus, reference to which has previously been noted 

 (E. S. R., 25, p. 387). 



Some notes on the encysted larva of the lung distome, S. Yoshida {Jour. 

 Parasitology, 2 {1916), No. 4, pp. 115-180, fig. i).— This further paper on the 

 .subject (E. S. R., 35, p. 384) reports some of the results obtained in a subse- 

 quent study on the cysts of the lung distome in crabs, especially Eriocheir 

 japonicus. 



Immunity studies on anthrax servun, A. Eichhobn, W. N. Bebg, and R. A. 

 Kelser {U. S. Dept. Ayr., Jour. Agr. Research, 8 {1917), No. 2, pp. 37-56, 

 fig. 1). — The authors have fractionated anthrax serum obtained by the hyperim- 

 munization technique previously described by the senior author (E. S. R., 34, 

 p. 579) by the methods commonly used in the fractionation of diphtheria anti- 

 toxin. The anthrax antibodies were found in the pseudoglobulin fraction. 

 The globulin preparations contained the antibodies in a concentrated form, as 

 shown by numerous tests on laboratory animals. Tests on larger animals also 

 proved the presence of antibodies in this preparation. Preliminary data 

 obtained from the use of the serum and globulin in the treatment of anthrax 

 in man showed it to yield very satisfactory results. 



The methods of analysis of serum and similar preparations with some slight 

 modifications and improvements are described in detail. For the separation of 

 globulin precipitates from their filtrates centrifugalization has been found to 

 be more effective and rapid than filtration. 



Experiments to determine the changes in the serum proteins during immuni- 

 zation (mule) showed a pronounced rise in the content of total coagulable 

 protein and total globulin, as has been noted by other investigators immunizing 

 against diphtheria, tetanus, and rinderpest virus. 



The value of a preparation as described, in that a much smaller dose is 

 required which may be safely inoculated intravenously and also as minimizing 

 the danger of anaphylactic shock, is pointed out. The complement-fixation test 

 has been applied to the standardization of the anthrax serum, and while it is 

 considered still to be in an experimental stage its value as an accurate method 

 of standardization Is indicated. 



The analytical and immunization data are submitted in tabular and graphical 

 form. 



