1917] VETERINARY MEDICINE. 881 



the experimeutal animals. TJie daily subcutaneous administration of 25-niR. 

 doses of tethelin to guinea pigs sensitized by dead and living human tubercle 

 bacilli had no appreciable effect on the development, recession, or rupture of 

 intracutaneous tubercles produced by dead human tubercle bacilli nor on deep 

 puncture wounds of the skin in the animals used. 



Observations on the presence of the Bacillus abortus bovinus in certified 

 milk, E. C. Flkischnek and K. P. Meyer {Amer. Jour. Diseases Children, 14 

 {J 917), No. 3, pp. 157-173). — This is a report of preliminary studies at San 

 Francisco, Cal., accompanied by a list of references to the literature. 



The authors conclude from the examination of a limited amount of material 

 that "B. abortus is, for practical purposes, always present in the certified milk 

 produced in the San Francisco Bay regions. Tubercle bacilli are not present 

 in this same milk in sufficient number to give tuberculosis to guinea pigs, 

 although this conclusion may prove incorrect on further experimentation. If 

 the above conclusion is correct, thei'e is no necessity for pasteurizing certified 

 milk on account of any danger that it may possess as a disseminator of bovine 

 tuberculosis to infants. 



" It is not unlikely that, in many previous milk tests for tubercle bacilli, the 

 anatomic lesions of bovine abortion disease in the guinea pig were mistaken for 

 tuberculosis. If the B. abortus is present in certified mflk to the extent evident 

 from these experiments, it is difficult to consider it pathogenic for infants, 

 without, so far as is known, ever having produced recognizable lesions on 

 post-mortem examination. The result of this work, however, is one more 

 definite indication that it is of greatest importance to study the abortus 

 problem from every angle to be absolutely certain of its bearing on the health 

 of infants." 



Tick eradication laws and regulations of the State of Arkansas, R. M. 

 Gow (Arkansas Sta. Bui. 132 {1917), pp. 8).— The text of the State tick eradi- 

 cation laws and regulations is given, with notes. 



A note on the immunity of suckling pigs to hog cholera, R. R. Biech 

 {Cornell Vet., 7 {1917), No. 3, pp. 199, 200) —The author notes an instance in 

 which two pigs of a hyperimmune sow died from natural exposure to hog 

 cholera at the ages of 31 and 37 days, respectively. Another pig from the same 

 litter died at the age of 27 days, but there was some doubt as to the definite 

 cause of death in this animal. The pigs were all nursed by a hyperimmune 

 mother until they refused food on account of sickness. 



It is indicated that " these observations add emphasis to the fact that, 

 although pigs of immune sows are often immune while being sucked, it is not 

 always safe to depend on this immunity." 



A serum test influenced by Ascaris infestation, R. R. Birch {Jour. Amor. 

 Vet. Med. Assoc, 51 {1917), No. 5, pp. 694-696) .—The author, who has fre- 

 quently observed that when exposed to hog cholera pigs infested with ascarids 

 die much more quickly than normal ones, especially if the parasites have en- 

 tered the gall duct, has found that ascarids are responsible for the differences 

 obtained from serum and virus. He thinks it quite probable that disastrous 

 results would follow simultaneous treatment of pigs badly infested if light doses 

 of serum were administered. 



Experiments in filtration of antihog-cholera serum, B. H. Edgington, A. 

 Broerman, and E. W. Porter {Jour. Infect. Diseases, 21 {1917), No. 3, pp. 258- 

 26//). — In the study reported attempts were made to produce bacteria-free anti- 

 hog-cholera serum by passage through Berkefeld and Chamberland P filters. 



The results obtained indicate that the immune bodies of antihog-cholera 

 serum are restrained by filtration through Chamberland F filters. The Berke- 



